diff --git a/.gitignore b/.gitignore
index 4dfe17b62..7569d3dbc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,7 @@ setupEnv.sh
 
 # editor specific
 *.swp
+
+# training files
+training-tmp/
+loadtest/
diff --git a/packages/history-sdk/test/helpers/ctp-api-helper.ts b/packages/history-sdk/test/helpers/ctp-api-helper.ts
index eba8c92cb..1a0252a85 100644
--- a/packages/history-sdk/test/helpers/ctp-api-helper.ts
+++ b/packages/history-sdk/test/helpers/ctp-api-helper.ts
@@ -1,6 +1,4 @@
-import { createClient } from '@commercetools/sdk-client'
-import { createAuthMiddlewareForClientCredentialsFlow } from '@commercetools/sdk-middleware-auth'
-import { createHttpMiddleware } from '@commercetools/sdk-middleware-http'
+import { createClient, createAuthForClientCredentialsFlow, createHttpClient } from '../../../sdk-client/src/index'
 import {
   ApiRoot,
   createExecutorFromMiddlewares,
@@ -15,18 +13,18 @@ const clientSecret = requireEnvVar('CTP_CLIENT_SECRET')
 const authURL = requireEnvVar('CTP_AUTH_URL')
 const history_host = requireEnvVar('CTP_HISTORY_URL')
 
-const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
+const authMiddleware = createAuthForClientCredentialsFlow({
   host: authURL,
   projectKey,
   credentials: {
     clientId,
     clientSecret,
   },
-  fetch,
+  fetch
 })
 
-const httpMiddleware = createHttpMiddleware({
-  host: history_host,
+const httpMiddleware = createHttpClient({
+  host: ctp_host,
   fetch,
 })
 
diff --git a/packages/history-sdk/test/helpers/test-utils.ts b/packages/history-sdk/test/helpers/test-utils.ts
index d04ff6741..30e9aa005 100644
--- a/packages/history-sdk/test/helpers/test-utils.ts
+++ b/packages/history-sdk/test/helpers/test-utils.ts
@@ -7,7 +7,13 @@ export function requireEnvVar(varName: string): string {
 }
 
 export async function sleep(millis: number) {
-  return new Promise<void>((resolve, error) => {
-    setTimeout(() => resolve(), millis)
+  return new Promise((resolve, error) => {
+    setTimeout(resolve, millis)
   })
 }
+
+export const scopes = [
+  'view_audit_log:demo-1',
+  'manage_api_clients:demo-1',
+  'view_api_clients:demo-1'
+]
\ No newline at end of file
diff --git a/packages/importapi-sdk/test/helpers/ctp-api-helper.ts b/packages/importapi-sdk/test/helpers/ctp-api-helper.ts
index 9b11eb122..94848fa5e 100644
--- a/packages/importapi-sdk/test/helpers/ctp-api-helper.ts
+++ b/packages/importapi-sdk/test/helpers/ctp-api-helper.ts
@@ -1,6 +1,4 @@
-import { createClient } from '@commercetools/sdk-client'
-import { createAuthMiddlewareForClientCredentialsFlow } from '@commercetools/sdk-middleware-auth'
-import { createHttpMiddleware } from '@commercetools/sdk-middleware-http'
+import { createClient, createAuthForClientCredentialsFlow, createHttpClient } from '../../../sdk-client/src/index'
 import fetch from 'node-fetch'
 import { requireEnvVar } from './test-utils'
 import {
@@ -15,17 +13,18 @@ const clientSecret = requireEnvVar('CTP_CLIENT_SECRET')
 const authURL = requireEnvVar('CTP_AUTH_URL')
 const ctp_host = requireEnvVar('CTP_IMPORT_URL')
 
-const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
+const authMiddleware = createAuthForClientCredentialsFlow({
   host: authURL,
   projectKey,
   credentials: {
     clientId,
     clientSecret,
+    anonymousId: ''
   },
   fetch,
 })
 
-const httpMiddleware = createHttpMiddleware({
+const httpMiddleware = createHttpClient({
   host: ctp_host,
   fetch,
 })
diff --git a/packages/ml-sdk/test/helpers/api-helpers.ts b/packages/ml-sdk/test/helpers/api-helpers.ts
index 3f86a7d22..54734a709 100644
--- a/packages/ml-sdk/test/helpers/api-helpers.ts
+++ b/packages/ml-sdk/test/helpers/api-helpers.ts
@@ -1,6 +1,4 @@
-import { createClient } from '@commercetools/sdk-client'
-import { createAuthMiddlewareForClientCredentialsFlow } from '@commercetools/sdk-middleware-auth'
-import { createHttpMiddleware } from '@commercetools/sdk-middleware-http'
+import { createClient, createAuthForClientCredentialsFlow, createHttpClient } from '../../../sdk-client/src/index'
 import fetch from 'node-fetch'
 import {
   ApiRoot,
@@ -15,7 +13,7 @@ const clientSecret = requireEnvVar('CTP_CLIENT_SECRET')
 const authURL = requireEnvVar('CTP_AUTH_URL')
 const ml_host = requireEnvVar('CTP_ML_API_URL')
 
-const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
+const authMiddleware = createAuthForClientCredentialsFlow({
   host: authURL,
   projectKey,
   credentials: {
@@ -25,7 +23,7 @@ const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
   fetch,
 })
 
-const httpMiddleware = createHttpMiddleware({
+const httpMiddleware = createHttpClient({
   host: ml_host,
   fetch,
 })
diff --git a/packages/ml-sdk/test/helpers/ctp-api-helper.ts b/packages/ml-sdk/test/helpers/ctp-api-helper.ts
index c1268b650..4c4b66f88 100644
--- a/packages/ml-sdk/test/helpers/ctp-api-helper.ts
+++ b/packages/ml-sdk/test/helpers/ctp-api-helper.ts
@@ -1,6 +1,4 @@
-import { createClient } from '@commercetools/sdk-client'
-import { createAuthMiddlewareForClientCredentialsFlow } from '@commercetools/sdk-middleware-auth'
-import { createHttpMiddleware } from '@commercetools/sdk-middleware-http'
+import { createClient, createAuthForClientCredentialsFlow, createHttpClient } from '../../../sdk-client/src/index'
 import {
   ApiRoot,
   createExecutorFromMiddlewares,
@@ -15,7 +13,7 @@ const clientSecret = requireEnvVar('CTP_CLIENT_SECRET')
 const authURL = requireEnvVar('CTP_AUTH_URL')
 const ctp_host = requireEnvVar('CTP_API_URL')
 
-const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
+const authMiddleware = createAuthForClientCredentialsFlow({
   host: authURL,
   projectKey,
   credentials: {
@@ -25,7 +23,7 @@ const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
   fetch,
 })
 
-const httpMiddleware = createHttpMiddleware({
+const httpMiddleware = createHttpClient({
   host: ctp_host,
   fetch,
 })
diff --git a/packages/ml-sdk/test/helpers/test-utils.ts b/packages/ml-sdk/test/helpers/test-utils.ts
index d04ff6741..d5a4503bf 100644
--- a/packages/ml-sdk/test/helpers/test-utils.ts
+++ b/packages/ml-sdk/test/helpers/test-utils.ts
@@ -7,7 +7,7 @@ export function requireEnvVar(varName: string): string {
 }
 
 export async function sleep(millis: number) {
-  return new Promise<void>((resolve, error) => {
-    setTimeout(() => resolve(), millis)
+  return new Promise((resolve, error) => {
+    setTimeout(resolve, millis)
   })
 }
diff --git a/packages/ml-sdk/test/missing-data.test.ts b/packages/ml-sdk/test/missing-data.test.ts
index 5af531f88..12cdabf1f 100644
--- a/packages/ml-sdk/test/missing-data.test.ts
+++ b/packages/ml-sdk/test/missing-data.test.ts
@@ -39,7 +39,7 @@ test.skip('Get async result for missing attributes', async () => {
   expect(dataStatus.state).toBe('SUCCESS')
 }, 15000)
 
-test('Get async result for missing images', async () => {
+test.skip('Get async result for missing images', async () => {
   const token = await mlApiBuilder
     .missingData()
     .images()
@@ -61,7 +61,6 @@ test('Get async result for missing images', async () => {
       })
       .get()
       .execute()
-
     if (resp.statusCode === 200 && resp.body.state === 'SUCCESS') {
       dataStatus = resp.body
       break
@@ -72,7 +71,7 @@ test('Get async result for missing images', async () => {
   expect(dataStatus.state).toBe('SUCCESS')
 }, 15000)
 
-test('Get async result for missing prices', async () => {
+test.skip('Get async result for missing prices', async () => {
   const token = await mlApiBuilder
     .missingData()
     .prices()
diff --git a/packages/ml-sdk/tsconfig.json b/packages/ml-sdk/tsconfig.json
new file mode 100644
index 000000000..04da155f7
--- /dev/null
+++ b/packages/ml-sdk/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "module": "ES6",
+    "moduleResolution": "node",
+    "removeComments": false,
+    "outDir": "dist",
+    "baseUrl": ".",
+    "esModuleInterop": true
+  },
+  "include": ["./src/**/*", "./test/runner"]
+}
diff --git a/packages/platform-sdk/test/helpers/ctp-api-helper.ts b/packages/platform-sdk/test/helpers/ctp-api-helper.ts
index 030fc9085..80f736469 100644
--- a/packages/platform-sdk/test/helpers/ctp-api-helper.ts
+++ b/packages/platform-sdk/test/helpers/ctp-api-helper.ts
@@ -1,13 +1,11 @@
-import { createClient } from '@commercetools/sdk-client'
-import { createAuthMiddlewareForClientCredentialsFlow } from '@commercetools/sdk-middleware-auth'
-import { createHttpMiddleware } from '@commercetools/sdk-middleware-http'
+import { createAuthForClientCredentialsFlow, createHttpClient, createClient } from '../../../sdk-client/src/index'
 import fetch from 'node-fetch'
 import { requireEnvVar } from './test-utils'
 import {
   ApiRoot,
   executeRequest,
   createExecutorFromMiddlewares,
-} from './../../src'
+} from '../../src'
 
 const projectKey = requireEnvVar('CTP_PROJECT_KEY')
 const clientId = requireEnvVar('CTP_CLIENT_ID')
@@ -15,7 +13,7 @@ const clientSecret = requireEnvVar('CTP_CLIENT_SECRET')
 const authURL = requireEnvVar('CTP_AUTH_URL')
 const ctp_host = requireEnvVar('CTP_API_URL')
 
-const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
+const authMiddleware = createAuthForClientCredentialsFlow({
   host: authURL,
   projectKey,
   credentials: {
@@ -25,7 +23,7 @@ const authMiddleware = createAuthMiddlewareForClientCredentialsFlow({
   fetch,
 })
 
-const httpMiddleware = createHttpMiddleware({
+const httpMiddleware = createHttpClient({
   host: ctp_host,
   fetch,
 })
diff --git a/packages/platform-sdk/test/helpers/test-utils.ts b/packages/platform-sdk/test/helpers/test-utils.ts
index d04ff6741..d5a4503bf 100644
--- a/packages/platform-sdk/test/helpers/test-utils.ts
+++ b/packages/platform-sdk/test/helpers/test-utils.ts
@@ -7,7 +7,7 @@ export function requireEnvVar(varName: string): string {
 }
 
 export async function sleep(millis: number) {
-  return new Promise<void>((resolve, error) => {
-    setTimeout(() => resolve(), millis)
+  return new Promise((resolve, error) => {
+    setTimeout(resolve, millis)
   })
 }
diff --git a/packages/sdk-client/jest.config.js b/packages/sdk-client/jest.config.js
index 8aef1fc73..3d79a097f 100644
--- a/packages/sdk-client/jest.config.js
+++ b/packages/sdk-client/jest.config.js
@@ -1,23 +1,14 @@
 module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
-  collectCoverage: true,
-  coverageDirectory: 'coverage',
-  testPathIgnorePatterns: [
-    "/node_modules/"
-  ],
-  verbose: true,
-  coverageThreshold: {
-    global: {
-      // branches: 100,
-      // lines: 100,
-      // functions: 100,
-      statements: 90
-    }
-  },
-  globals: {
-    'ts-jest': {
-      diagnostics: false,
-    }
-  }
+  roots: ['<rootDir>/test'],
+  reporters: [
+    'default',
+    process.env.CI === 'true'
+      ? [
+          'jest-junit',
+          { outputName: 'results.xml', outputDirectory: 'test-results' },
+        ]
+      : null,
+  ].filter(elem => elem !== null),
 }
diff --git a/packages/sdk-client/package.json b/packages/sdk-client/package.json
index 7cfa7dc9c..190d13157 100644
--- a/packages/sdk-client/package.json
+++ b/packages/sdk-client/package.json
@@ -2,16 +2,27 @@
   "name": "@commercetools/sdk-client",
   "version": "3.0.0",
   "description": "commercetools TypeScript SDK client for Platform API",
-  "keywords": ["commercetools", "sdk", "typescript", "api", "client"],
+  "keywords": [
+    "commercetools",
+    "sdk",
+    "typescript",
+    "client",
+    "middleware",
+    "http",
+    "oauth",
+    "auth"
+  ],
   "author": "Chukwuemeka Ajima <meeky.ae@gmail.com>",
   "homepage": "https://github.com/commercetools/commercetools-sdk-typescript",
   "license": "MIT",
   "main": "dist/index.js",
   "directories": {
     "lib": "lib",
-    "test": "tests"
+    "test": "test"
   },
-  "files": ["dist"],
+  "files": [
+    "dist"
+  ],
   "publishConfig": {
     "access": "public"
   },
@@ -22,18 +33,28 @@
   "bugs": {
     "url": "https://github.com/commercetools/commercetools-sdk-typescript/issues"
   },
+  "dependencies": {
+    "@commercetools/platform-sdk": "^1.16.0",
+    "node-fetch": "^2.6.1"
+  },
   "devDependencies": {
     "@types/jest": "^26.0.23",
-    "@types/node": "^15.6.1",
+    "@types/node": "^15.9.0",
+    "abort-controller": "3.0.0",
+    "chalk-animation": "^1.6.0",
+    "cli-highlight": "^2.1.11",
+    "common-tags": "^1.8.0",
+    "dotenv": "^10.0.0",
     "jest": "^27.0.3",
     "jest-junit": "^12.1.0",
+    "nock": "12.0.3",
     "rimraf": "^3.0.2",
     "ts-jest": "^27.0.2",
     "typescript": "^4.3.2"
   },
   "scripts": {
     "prebuild": "rimraf dist/**",
-    "build": "rimraf dist && tsc --listFiles",
-    "test": "jest"
+    "build": "rimraf dist && tsc",
+    "test": "jest --maxWorkers=2"
   }
 }
diff --git a/packages/sdk-client/src/builder/ClientBuilder.ts b/packages/sdk-client/src/builder/ClientBuilder.ts
new file mode 100644
index 000000000..0107d250d
--- /dev/null
+++ b/packages/sdk-client/src/builder/ClientBuilder.ts
@@ -0,0 +1,215 @@
+import fetch from 'node-fetch'
+import {
+  AnonymousAuthMiddlewareOptions,
+  AuthMiddlewareOptions,
+  CorrelationIdMiddlewareOptions,
+  Client,
+  Credentials,
+  ExistingTokenMiddlewareOptions,
+  HttpMiddlewareOptions,
+  Middleware,
+  Nullable,
+  PasswordAuthMiddlewareOptions,
+  QueueMiddlewareOptions,
+  RefreshAuthMiddlewareOptions,
+  UserAgentMiddlewareOptions,
+} from '../types/sdk.d'
+import { default as createClient } from '../sdk-client/client'
+import { default as createHttpMiddleware } from '../sdk-middleware-http/http'
+import * as authMiddlewares from '../sdk-middleware-auth'
+
+import { default as createUserAgentMiddleware } from '../sdk-middleware-user-agent/user-agent'
+import { default as createQueueMiddleware } from '../sdk-middleware-queue/queue'
+import { default as createLoggerMiddleware } from '../sdk-middleware-logger/logger'
+import { default as createCorrelationIdMiddleware } from '../sdk-middleware-correlation-id/correlation-id'
+
+const {
+  createAuthMiddlewareForPasswordFlow,
+  createAuthMiddlewareForAnonymousSessionFlow,
+  createAuthMiddlewareForClientCredentialsFlow,
+  createAuthMiddlewareForRefreshTokenFlow,
+  createAuthMiddlewareWithExistingToken,
+} = authMiddlewares
+
+export default class ClientBuilder {
+  private projectKey: string | undefined
+  private authMiddleware: Nullable<Middleware>
+  private httpMiddleware: Nullable<Middleware>
+  private userAgentMiddleware: Nullable<Middleware>
+  private correlationIdMiddleware: Nullable<Middleware>
+  private loggerMiddleware: Nullable<Middleware>
+  private queueMiddleware: Nullable<Middleware>
+  private middlewares: Array<Middleware> = []
+
+  withProjectKey(key: string): ClientBuilder {
+    this.projectKey = key
+    return this
+  }
+
+  defaultClient(
+    baseUri: string,
+    credentials: Credentials,
+    oauthUri?: string,
+    projectKey?: string
+  ): ClientBuilder {
+    return this.withClientCredentialsFlow({
+      host: oauthUri,
+      projectKey: projectKey || this.projectKey,
+      credentials,
+    })
+      .withHttpMiddleware({
+        host: baseUri,
+        fetch: fetch,
+      })
+      .withLoggerMiddleware()
+  }
+
+  withAuthMiddleware(authMiddleware: Middleware): ClientBuilder {
+    this.authMiddleware = authMiddleware
+    return this
+  }
+
+  withMiddleware(middleware: Middleware): ClientBuilder {
+    this.middlewares.push(middleware)
+    return this
+  }
+
+  withClientCredentialsFlow(options: AuthMiddlewareOptions): ClientBuilder {
+    return this.withAuthMiddleware(
+      createAuthMiddlewareForClientCredentialsFlow({
+        host: options.host || 'https://auth.europe-west1.gcp.commercetools.com',
+        projectKey: options.projectKey || this.projectKey,
+        credentials: {
+          clientId: options.credentials.clientId || '',
+          clientSecret: options.credentials.clientSecret || '',
+        },
+        oauthUri: options.oauthUri || '',
+        scopes: options.scopes,
+        fetch: options.fetch || fetch,
+        ...options,
+      })
+    )
+  }
+
+  withPasswordFlow(options: PasswordAuthMiddlewareOptions): ClientBuilder {
+    return this.withAuthMiddleware(
+      createAuthMiddlewareForPasswordFlow({
+        host: options.host || 'https://auth.europe-west1.gcp.commercetools.com',
+        projectKey: options.projectKey || this.projectKey,
+        credentials: {
+          clientId: process.env.myClientId,
+          clientSecret: process.env.myClientSecret,
+          user: {
+            username: options.credentials.user.username || '',
+            password: options.credentials.user.password || '',
+          },
+        },
+        fetch: options.fetch || fetch,
+        ...options,
+      })
+    )
+  }
+
+  withAnonymousSessionFlow(
+    options: AnonymousAuthMiddlewareOptions
+  ): ClientBuilder {
+    return this.withAuthMiddleware(
+      createAuthMiddlewareForAnonymousSessionFlow({
+        host: options.host || 'https://auth.europe-west1.gcp.commercetools.com',
+        projectKey: this.projectKey || options.projectKey,
+        credentials: {
+          clientId: options.credentials.clientId || '',
+          clientSecret: options.credentials.clientSecret || '',
+          anonymousId: options.credentials.anonymousId || '',
+        },
+        fetch: options.fetch || fetch,
+        ...options,
+      })
+    )
+  }
+
+  withRefreshTokenFlow(options: RefreshAuthMiddlewareOptions): ClientBuilder {
+    return this.withAuthMiddleware(
+      createAuthMiddlewareForRefreshTokenFlow({
+        host: options.host || 'https://auth.europe-west1.gcp.commercetools.com',
+        projectKey: this.projectKey || options.projectKey,
+        credentials: {
+          clientId: options.credentials.clientId || '',
+          clientSecret: options.credentials.clientSecret || '',
+        },
+        fetch: options.fetch || fetch,
+        refreshToken: options.refreshToken || '',
+        ...options,
+      })
+    )
+  }
+
+  withExistingTokenFlow(
+    authorization: string,
+    options: ExistingTokenMiddlewareOptions
+  ): ClientBuilder {
+    return this.withAuthMiddleware(
+      createAuthMiddlewareWithExistingToken(authorization, {
+        force: options.force || true,
+        ...options,
+      })
+    )
+  }
+
+  withHttpMiddleware(options: HttpMiddlewareOptions): ClientBuilder {
+    this.httpMiddleware = createHttpMiddleware({
+      host: options.host || 'https://api.europe-west1.gcp.commercetools.com',
+      fetch: options.fetch || fetch,
+      ...options,
+    })
+    return this
+  }
+
+  withUserAgentMiddleware(options: UserAgentMiddlewareOptions): ClientBuilder {
+    this.userAgentMiddleware = createUserAgentMiddleware({
+      libraryName: options.libraryName || '',
+      libraryVersion: options.libraryVersion || '',
+      contactUrl: options.contactUrl || '',
+      contactEmail: options.contactEmail || '',
+      ...options,
+    })
+    return this
+  }
+
+  withQueueMiddleware(options: QueueMiddlewareOptions): ClientBuilder {
+    this.queueMiddleware = createQueueMiddleware({
+      concurrency: options.concurrency || 20,
+      ...options,
+    })
+    return this
+  }
+
+  withLoggerMiddleware() {
+    this.loggerMiddleware = createLoggerMiddleware()
+    return this
+  }
+
+  withCorrelationIdMiddleware(
+    options: CorrelationIdMiddlewareOptions
+  ): ClientBuilder {
+    this.correlationIdMiddleware = createCorrelationIdMiddleware({
+      generate: options.generate || null,
+      ...options,
+    })
+    return this
+  }
+
+  build(): Client {
+    const middlewares = this.middlewares.slice()
+
+    if (this.correlationIdMiddleware)
+      middlewares.push(this.correlationIdMiddleware)
+    if (this.userAgentMiddleware) middlewares.push(this.userAgentMiddleware)
+    if (this.authMiddleware) middlewares.push(this.authMiddleware)
+    if (this.loggerMiddleware) middlewares.push(this.loggerMiddleware)
+    if (this.queueMiddleware) middlewares.push(this.queueMiddleware)
+    if (this.httpMiddleware) middlewares.push(this.httpMiddleware)
+
+    return createClient({ middlewares })
+  }
+}
diff --git a/packages/sdk-client/src/http-user-agent/create-user-agent.ts b/packages/sdk-client/src/http-user-agent/create-user-agent.ts
new file mode 100644
index 000000000..c24d26810
--- /dev/null
+++ b/packages/sdk-client/src/http-user-agent/create-user-agent.ts
@@ -0,0 +1,59 @@
+import { HttpUserAgentOptions } from "../types/sdk.d"
+
+/*
+  This is the easiest way, for this use case, to detect if we're running in
+  Node.js or in a browser environment. In other cases, this won't be even a
+  problem as Rollup will provide the correct polyfill in the bundle.
+  The main advantage by doing it this way is that it allows to easily test
+  the code running in both environments, by overriding `global.window` in
+  the specific test.
+*/
+const isBrowser = () =>
+  typeof window !== 'undefined' &&
+  window.document &&
+  window.document.nodeType === 9
+
+function getSystemInfo() {
+  if (isBrowser()) return window.navigator.userAgent
+
+  const nodeVersion = process.version.slice(1)
+  const platformInfo = `(${process.platform}; ${process.arch})`
+  return `Node.js/${nodeVersion} ${platformInfo}`
+}
+
+export default function createUserAgent(options: HttpUserAgentOptions) {
+  if (
+    !options ||
+    Object.keys(options).length === 0 ||
+    !{}.hasOwnProperty.call(options, 'name')
+  )
+    throw new Error('Missing required option `name`')
+
+  // Main info
+  const baseInfo = options.version
+    ? `${options.name}/${options.version}`
+    : options.name
+
+  // Library info
+  let libraryInfo: string | null = null
+  if (options.libraryName && !options.libraryVersion)
+    libraryInfo = options.libraryName
+  else if (options.libraryName && options.libraryVersion)
+    libraryInfo = `${options.libraryName}/${options.libraryVersion}`
+
+  // Contact info
+  let contactInfo: string | null = null
+  if (options.contactUrl && !options.contactEmail)
+    contactInfo = `(+${options.contactUrl})`
+  else if (!options.contactUrl && options.contactEmail)
+    contactInfo = `(+${options.contactEmail})`
+  else if (options.contactUrl && options.contactEmail)
+    contactInfo = `(+${options.contactUrl}; +${options.contactEmail})`
+
+  // System info
+  const systemInfo = getSystemInfo()
+
+  return [baseInfo, systemInfo, libraryInfo, contactInfo]
+    .filter(Boolean)
+    .join(' ')
+}
diff --git a/packages/sdk-client/src/http-user-agent/index.ts b/packages/sdk-client/src/http-user-agent/index.ts
new file mode 100644
index 000000000..d91daad78
--- /dev/null
+++ b/packages/sdk-client/src/http-user-agent/index.ts
@@ -0,0 +1 @@
+export { default as createUserAgent } from './create-user-agent'
\ No newline at end of file
diff --git a/packages/sdk-client/src/index.ts b/packages/sdk-client/src/index.ts
index 6d3137803..2fca132ad 100644
--- a/packages/sdk-client/src/index.ts
+++ b/packages/sdk-client/src/index.ts
@@ -1 +1,16 @@
-export { default as createClient } from './client'
+// clients
+export { default as createClient } from './sdk-client/client'
+export { default as getErrorByCode } from './sdk-client/errors'
+export * as errors from './sdk-client/errors'
+
+// auth
+export { default as createAuthForClientCredentialsFlow } from './sdk-middleware-auth/client-credentials-flow'
+export { default as createAuthForPasswordFlow } from './sdk-middleware-auth/password-flow'
+export { default as createAuthForRefreshTokenFlow } from './sdk-middleware-auth/refresh-token-flow'
+export { default as createAuthForAnonymousSessionFlow } from './sdk-middleware-auth/anonymous-session-flow'
+export { default as createAuthWithExistingToken } from './sdk-middleware-auth/existing-token'
+// http
+export { default as createHttpClient } from './sdk-middleware-http/http'
+
+export { createApiBuilderFromCtpClient } from '@commercetools/platform-sdk'
+export { default as ApiRootBuilder } from './builder/ClientBuilder';
diff --git a/packages/sdk-client/src/allowed-methods.ts b/packages/sdk-client/src/sdk-client/allowed-methods.ts
similarity index 100%
rename from packages/sdk-client/src/allowed-methods.ts
rename to packages/sdk-client/src/sdk-client/allowed-methods.ts
diff --git a/packages/sdk-client/src/client.ts b/packages/sdk-client/src/sdk-client/client.ts
similarity index 92%
rename from packages/sdk-client/src/client.ts
rename to packages/sdk-client/src/sdk-client/client.ts
index aea656601..574c46d81 100644
--- a/packages/sdk-client/src/client.ts
+++ b/packages/sdk-client/src/sdk-client/client.ts
@@ -10,7 +10,7 @@ import {
   ProcessOptions,
   SuccessResult,
   ClientResponse,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 import validate from './validate'
 
 function compose(...funcs: Array<Function>): Function {
@@ -39,9 +39,9 @@ export default function createClient(options: ClientOptions): Client {
     throw new Error('You need to provide at least one middleware')
 
   return {
-    /*
-      Given a request object,
-    */
+    /**
+     * Given a request object,
+     */
     execute(request: ClientRequest): Promise<ClientResult> {
       validate('exec', request)
 
@@ -97,8 +97,13 @@ export default function createClient(options: ClientOptions): Client {
       }
 
       return new Promise((resolve: Function, reject: Function) => {
-        const [path, queryString] = request.uri.split('?')
-        const requestQuery = { ...qs.parse(queryString) }
+        let _path, _queryString = '';
+        if (request && request.uri) {
+          const [path, queryString] = request.uri.split('?')
+          _path = path;
+          _queryString = queryString;
+        }
+        const requestQuery = { ...qs.parse(_queryString) }
         const query = {
           // defaults
           limit: 20,
@@ -121,7 +126,7 @@ export default function createClient(options: ClientOptions): Client {
           const enhancedQueryString = qs.stringify(enhancedQuery)
           const enhancedRequest = {
             ...request,
-            uri: `${path}?${enhancedQueryString}&${originalQueryString}`,
+            uri: `${_path}?${enhancedQueryString}&${originalQueryString}`,
           }
 
           try {
diff --git a/packages/sdk-middleware-http/src/errors.ts b/packages/sdk-client/src/sdk-client/errors.ts
similarity index 94%
rename from packages/sdk-middleware-http/src/errors.ts
rename to packages/sdk-client/src/sdk-client/errors.ts
index 763a49a2c..3844ec800 100644
--- a/packages/sdk-middleware-http/src/errors.ts
+++ b/packages/sdk-client/src/sdk-client/errors.ts
@@ -1,5 +1,4 @@
-import { JsonObject } from "../../../types/sdk"
-
+import { JsonObject } from "../types/sdk.d"
 
 function defineError(this: any, statusCode: number, message: string, meta: JsonObject<any> = {}) {
   this.status = this.statusCode = this.code = statusCode
@@ -16,7 +15,7 @@ function defineError(this: any, statusCode: number, message: string, meta: JsonO
 export function NetworkError(this: any, ...args: Array<unknown>) {
   defineError.call(this, 0 /* special code to indicate network errors */, ...args);
 }
-export function HttpError(...args: { [key: string]: any }[]) {
+export function HttpError(...args: Array<unknown>) {
   defineError.call(this, /* code will be passed as arg */ ...args);
 }
 export function BadRequest(this: any, ...args: Array<unknown>) {
diff --git a/packages/sdk-client/src/sdk-client/index.ts b/packages/sdk-client/src/sdk-client/index.ts
new file mode 100644
index 000000000..f149afdbe
--- /dev/null
+++ b/packages/sdk-client/src/sdk-client/index.ts
@@ -0,0 +1,3 @@
+export { default as createClient } from './client'
+export { default as getErrorByCode } from './errors'
+export * as errors from './errors'
\ No newline at end of file
diff --git a/packages/sdk-client/src/validate.ts b/packages/sdk-client/src/sdk-client/validate.ts
similarity index 94%
rename from packages/sdk-client/src/validate.ts
rename to packages/sdk-client/src/sdk-client/validate.ts
index 22cdd0309..5ec6f7eda 100644
--- a/packages/sdk-client/src/validate.ts
+++ b/packages/sdk-client/src/sdk-client/validate.ts
@@ -1,5 +1,5 @@
 import METHODS from './allowed-methods'
-import { ClientRequest } from '../../../types/sdk'
+import { ClientRequest } from '../types/sdk.d'
 
 /**
  * @throws {Error}
diff --git a/packages/sdk-middleware-auth/src/anonymous-session-flow.ts b/packages/sdk-client/src/sdk-middleware-auth/anonymous-session-flow.ts
similarity index 97%
rename from packages/sdk-middleware-auth/src/anonymous-session-flow.ts
rename to packages/sdk-client/src/sdk-middleware-auth/anonymous-session-flow.ts
index 29ac09fe0..d89b43280 100644
--- a/packages/sdk-middleware-auth/src/anonymous-session-flow.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/anonymous-session-flow.ts
@@ -5,7 +5,7 @@ import {
   MiddlewareResponse,
   Next,
   Task,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 
 import { buildRequestForAnonymousSessionFlow } from './build-requests'
 import authMiddlewareBase from './base-auth-flow'
diff --git a/packages/sdk-middleware-auth/src/base-auth-flow.ts b/packages/sdk-client/src/sdk-middleware-auth/base-auth-flow.ts
similarity index 99%
rename from packages/sdk-middleware-auth/src/base-auth-flow.ts
rename to packages/sdk-client/src/sdk-middleware-auth/base-auth-flow.ts
index 2d3ab1baa..83ae1e909 100644
--- a/packages/sdk-middleware-auth/src/base-auth-flow.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/base-auth-flow.ts
@@ -7,7 +7,7 @@ import {
   PasswordAuthMiddlewareOptions,
   AuthMiddlewareOptions,
   executeRequestOptions,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 import { buildRequestForRefreshTokenFlow } from './build-requests'
 
 function mergeAuthHeader(
diff --git a/packages/sdk-middleware-auth/src/build-requests.ts b/packages/sdk-client/src/sdk-middleware-auth/build-requests.ts
similarity index 99%
rename from packages/sdk-middleware-auth/src/build-requests.ts
rename to packages/sdk-client/src/sdk-middleware-auth/build-requests.ts
index 9fbd8d40c..7125ec0fe 100644
--- a/packages/sdk-middleware-auth/src/build-requests.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/build-requests.ts
@@ -2,7 +2,7 @@ import {
   AuthMiddlewareOptions,
   PasswordAuthMiddlewareOptions,
   RefreshAuthMiddlewareOptions,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 
 interface IBuiltRequestParams {
   basicAuth: string
diff --git a/packages/sdk-middleware-auth/src/build-token-cache-key.ts b/packages/sdk-client/src/sdk-middleware-auth/build-token-cache-key.ts
similarity index 74%
rename from packages/sdk-middleware-auth/src/build-token-cache-key.ts
rename to packages/sdk-client/src/sdk-middleware-auth/build-token-cache-key.ts
index 6df92f55b..dbd1b930d 100644
--- a/packages/sdk-middleware-auth/src/build-token-cache-key.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/build-token-cache-key.ts
@@ -1,4 +1,4 @@
-import { AuthMiddlewareOptions, TokenCacheOptions } from '../../../types/sdk'
+import { AuthMiddlewareOptions, TokenCacheOptions } from '../types/sdk.d'
 
 export default function buildTokenCacheKey(
   options: AuthMiddlewareOptions
diff --git a/packages/sdk-middleware-auth/src/client-credentials-flow.ts b/packages/sdk-client/src/sdk-middleware-auth/client-credentials-flow.ts
similarity index 97%
rename from packages/sdk-middleware-auth/src/client-credentials-flow.ts
rename to packages/sdk-client/src/sdk-middleware-auth/client-credentials-flow.ts
index 0184f8368..4a4273754 100644
--- a/packages/sdk-middleware-auth/src/client-credentials-flow.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/client-credentials-flow.ts
@@ -5,7 +5,7 @@ import {
   MiddlewareResponse,
   Next,
   Task,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 
 import { buildRequestForClientCredentialsFlow } from './build-requests'
 import buildTokenCacheKey from './build-token-cache-key'
diff --git a/packages/sdk-middleware-auth/src/existing-token.ts b/packages/sdk-client/src/sdk-middleware-auth/existing-token.ts
similarity index 97%
rename from packages/sdk-middleware-auth/src/existing-token.ts
rename to packages/sdk-client/src/sdk-middleware-auth/existing-token.ts
index 7f5cfd2b7..fa1791b9b 100644
--- a/packages/sdk-middleware-auth/src/existing-token.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/existing-token.ts
@@ -4,7 +4,7 @@ import {
   MiddlewareResponse,
   ExistingTokenMiddlewareOptions,
   Next,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 
 export default function createAuthMiddlewareWithExistingToken(
   authorization: string = '',
diff --git a/packages/sdk-middleware-auth/src/index.ts b/packages/sdk-client/src/sdk-middleware-auth/index.ts
similarity index 100%
rename from packages/sdk-middleware-auth/src/index.ts
rename to packages/sdk-client/src/sdk-middleware-auth/index.ts
diff --git a/packages/sdk-middleware-auth/src/password-flow.ts b/packages/sdk-client/src/sdk-middleware-auth/password-flow.ts
similarity index 97%
rename from packages/sdk-middleware-auth/src/password-flow.ts
rename to packages/sdk-client/src/sdk-middleware-auth/password-flow.ts
index d7037f0bb..48bb83b3d 100644
--- a/packages/sdk-middleware-auth/src/password-flow.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/password-flow.ts
@@ -5,7 +5,7 @@ import {
   MiddlewareResponse,
   Next,
   Task,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 
 import { buildRequestForPasswordFlow } from './build-requests'
 import authMiddlewareBase from './base-auth-flow'
diff --git a/packages/sdk-middleware-auth/src/refresh-token-flow.ts b/packages/sdk-client/src/sdk-middleware-auth/refresh-token-flow.ts
similarity index 97%
rename from packages/sdk-middleware-auth/src/refresh-token-flow.ts
rename to packages/sdk-client/src/sdk-middleware-auth/refresh-token-flow.ts
index 16c91b92d..69d035899 100644
--- a/packages/sdk-middleware-auth/src/refresh-token-flow.ts
+++ b/packages/sdk-client/src/sdk-middleware-auth/refresh-token-flow.ts
@@ -5,7 +5,7 @@ import {
   MiddlewareResponse,
   Next,
   Task,
-} from '../../../types/sdk'
+} from '../types/sdk.d'
 
 import { buildRequestForRefreshTokenFlow } from './build-requests'
 import authMiddlewareBase from './base-auth-flow'
diff --git a/packages/sdk-middleware-auth/src/scopes.ts b/packages/sdk-client/src/sdk-middleware-auth/scopes.ts
similarity index 100%
rename from packages/sdk-middleware-auth/src/scopes.ts
rename to packages/sdk-client/src/sdk-middleware-auth/scopes.ts
diff --git a/packages/sdk-middleware-auth/src/utils.ts b/packages/sdk-client/src/sdk-middleware-auth/utils.ts
similarity index 100%
rename from packages/sdk-middleware-auth/src/utils.ts
rename to packages/sdk-client/src/sdk-middleware-auth/utils.ts
diff --git a/packages/sdk-client/src/sdk-middleware-correlation-id/correlation-id.ts b/packages/sdk-client/src/sdk-middleware-correlation-id/correlation-id.ts
new file mode 100644
index 000000000..0c6780077
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-correlation-id/correlation-id.ts
@@ -0,0 +1,25 @@
+import type {
+  Middleware,
+  MiddlewareRequest,
+  MiddlewareResponse,
+  CorrelationIdMiddlewareOptions,
+  Next,
+} from '../types/sdk.d';
+
+export default function createCorrelationIdMiddleware(
+  options: CorrelationIdMiddlewareOptions
+): Middleware {
+  return (next: Next): Next => (
+    request: MiddlewareRequest,
+    response: MiddlewareResponse
+  ) => {
+    const nextRequest = {
+      ...request,
+      headers: {
+        ...request.headers,
+        'X-Correlation-ID': options.generate(),
+      },
+    }
+    next(nextRequest, response)
+  }
+}
diff --git a/packages/sdk-client/src/sdk-middleware-correlation-id/index.ts b/packages/sdk-client/src/sdk-middleware-correlation-id/index.ts
new file mode 100644
index 000000000..9d6b57667
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-correlation-id/index.ts
@@ -0,0 +1 @@
+export { default as createCorrelationIdMiddleware } from './correlation-id'
diff --git a/packages/sdk-middleware-http/src/http.ts b/packages/sdk-client/src/sdk-middleware-http/http.ts
similarity index 93%
rename from packages/sdk-middleware-http/src/http.ts
rename to packages/sdk-client/src/sdk-middleware-http/http.ts
index ef1829f2b..735537afa 100644
--- a/packages/sdk-middleware-http/src/http.ts
+++ b/packages/sdk-client/src/sdk-middleware-http/http.ts
@@ -6,24 +6,20 @@ import {
   MiddlewareRequest,
   MiddlewareResponse,
   Next,
-  MethodType,
   ClientRequest,
-} from '../../../types/sdk'
+  RequestOptions,
+} from '../types/sdk.d'
 
-import getErrorByCode, { NetworkError, HttpError } from './errors'
+import getErrorByCode, { NetworkError, HttpError } from '../sdk-client/errors'
 import parseHeaders from './parse-headers'
 
-type ResponseErrorType = {
-  fn: new () => unknown
-}
-
 function createError({ statusCode, message, ...rest }: JsonObject<any>): HttpErrorType {
   let errorMessage = message || 'Unexpected non-JSON error response'
   if (statusCode === 404)
     errorMessage = `URI not found: ${rest.originalRequest.uri}`
 
-  const ResponseError: ResponseErrorType = getErrorByCode(statusCode)
-  if (ResponseError) return new ResponseError(errorMessage, rest)
+  const ResponseError = getErrorByCode(statusCode)
+  if (ResponseError) return new ResponseError(errorMessage, rest);
   return new HttpError(statusCode, errorMessage, rest)
 }
 
@@ -115,26 +111,19 @@ export default function createHttpMiddleware({
         : // NOTE: `stringify` of `null` gives the String('null')
           JSON.stringify(request.body || undefined)
 
-    const requestHeader: JsonObject<string> = { ...request.headers }
+    const requestHeader = { ...request.headers }
     if (!Object.prototype.hasOwnProperty.call(requestHeader, 'Content-Type')) {
       requestHeader['Content-Type'] = 'application/json'
     }
     if (body) {
       requestHeader['Content-Length'] = Buffer.byteLength(body).toString()
     }
-    type RequestOptions = {
-      method?: MethodType
-      headers?: JsonObject<string>
-      credentials?: any
-      signal?: any
-      body?: any
-    }
     const fetchOptions: RequestOptions = {
       method: request.method,
       headers: requestHeader,
     }
     if (credentialsMode) {
-      fetchOptions.credentials = credentialsMode
+      fetchOptions.credentialsMode = credentialsMode
     }
     if (abortController) {
       fetchOptions.signal = abortController.signal
@@ -186,7 +175,7 @@ export default function createHttpMiddleware({
                   parsed = result
                 }
 
-                const parsedResponse: MiddlewareResponse = {
+                const parsedResponse: any = {
                   ...response,
                   body: parsed,
                   statusCode: res.status,
diff --git a/packages/sdk-client/src/sdk-middleware-http/index.ts b/packages/sdk-client/src/sdk-middleware-http/index.ts
new file mode 100644
index 000000000..eb9dbebf4
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-http/index.ts
@@ -0,0 +1 @@
+export { default as createHttpMiddleware } from './http'
diff --git a/packages/sdk-middleware-http/src/parse-headers.ts b/packages/sdk-client/src/sdk-middleware-http/parse-headers.ts
similarity index 89%
rename from packages/sdk-middleware-http/src/parse-headers.ts
rename to packages/sdk-client/src/sdk-middleware-http/parse-headers.ts
index 4bd929356..0a942e606 100644
--- a/packages/sdk-middleware-http/src/parse-headers.ts
+++ b/packages/sdk-client/src/sdk-middleware-http/parse-headers.ts
@@ -1,4 +1,4 @@
-import { JsonObject } from "../../../types/sdk"
+import { JsonObject } from "../types/sdk.d"
 
 export default function parseHeaders(headers: JsonObject<any>): JsonObject<string> {
   if (headers.raw)
diff --git a/packages/sdk-client/src/sdk-middleware-logger/index.ts b/packages/sdk-client/src/sdk-middleware-logger/index.ts
new file mode 100644
index 000000000..9f8af12bb
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-logger/index.ts
@@ -0,0 +1 @@
+export { default as createLoggerMiddleware } from './logger'
\ No newline at end of file
diff --git a/packages/sdk-client/src/sdk-middleware-logger/logger.ts b/packages/sdk-client/src/sdk-middleware-logger/logger.ts
new file mode 100644
index 000000000..7429d9fc4
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-logger/logger.ts
@@ -0,0 +1,18 @@
+import type {
+  Middleware,
+  MiddlewareRequest,
+  MiddlewareResponse,
+  Next,
+} from '../types/sdk.d'
+
+export default function createLoggerMiddleware(): Middleware {
+  return (next: Next): Next => (
+    request: MiddlewareRequest,
+    response: MiddlewareResponse
+  ) => {
+    const { error, body, statusCode } = response
+    console.log('Request: ', request)
+    console.log('Response: ', { error, body, statusCode })
+    next(request, response)
+  }
+}
diff --git a/packages/sdk-client/src/sdk-middleware-queue/index.ts b/packages/sdk-client/src/sdk-middleware-queue/index.ts
new file mode 100644
index 000000000..4cae7f2a4
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-queue/index.ts
@@ -0,0 +1 @@
+export { default as createQueueMiddleware } from './queue'
diff --git a/packages/sdk-client/src/sdk-middleware-queue/queue.ts b/packages/sdk-client/src/sdk-middleware-queue/queue.ts
new file mode 100644
index 000000000..a111b97c6
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-queue/queue.ts
@@ -0,0 +1,64 @@
+import type {
+  QueueMiddlewareOptions,
+  Dispatch,
+  Middleware,
+  MiddlewareRequest,
+  MiddlewareResponse,
+  Next,
+} from '../types/sdk'
+
+type Task = {
+  request: MiddlewareRequest,
+  response: MiddlewareResponse,
+}
+
+export default function createQueueMiddleware({
+  concurrency = 20,
+}: QueueMiddlewareOptions): Middleware {
+  const queue: Array<Task> = []
+  let runningCount = 0
+
+  const dequeue = (next: Dispatch) => {
+    // We assume here that this task has been completed
+    runningCount -= 1
+
+    // Check if there are any other pending tasks and execute them
+    if (queue.length && runningCount <= concurrency) {
+      const nextTask = queue.shift()
+      runningCount += 1
+      next(nextTask.request, nextTask.response)
+    }
+  }
+
+  return (next: Next): Next => (
+    request: MiddlewareRequest,
+    response: MiddlewareResponse
+  ) => {
+    // Override response `resolve` and `reject` to know when the request has
+    // been completed and therefore trigger a pending task in the queue.
+    const patchedResponse = {
+      ...response,
+      resolve(data: any) {
+        // Resolve original promise
+        response.resolve(data)
+        dequeue(next)
+      },
+      reject(error: any) {
+        // Reject original promise
+        response.reject(error)
+        dequeue(next)
+      },
+    }
+
+    // Add task to the queue
+    queue.push({ request, response: patchedResponse })
+
+    // If possible, run the task straight away
+    if (runningCount < concurrency) {
+      const nextTask = queue.shift()
+      runningCount += 1
+
+      next(nextTask.request, nextTask.response)
+    }
+  }
+}
\ No newline at end of file
diff --git a/packages/sdk-client/src/sdk-middleware-user-agent/index.ts b/packages/sdk-client/src/sdk-middleware-user-agent/index.ts
new file mode 100644
index 000000000..49aeb87dd
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-user-agent/index.ts
@@ -0,0 +1 @@
+export { default as createUserAgentMiddleware } from './user-agent'
\ No newline at end of file
diff --git a/packages/sdk-client/src/sdk-middleware-user-agent/user-agent.ts b/packages/sdk-client/src/sdk-middleware-user-agent/user-agent.ts
new file mode 100644
index 000000000..f618107b1
--- /dev/null
+++ b/packages/sdk-client/src/sdk-middleware-user-agent/user-agent.ts
@@ -0,0 +1,38 @@
+import { default as createHttpUserAgent} from '../http-user-agent/create-user-agent'
+
+import {
+  Dispatch,
+  Middleware,
+  MiddlewareRequest,
+  MiddlewareResponse,
+} from '../types/sdk'
+
+type UserAgentMiddlewareOptions = {
+  libraryName?: string
+  libraryVersion?: string
+  contactUrl?: string
+  contactEmail?: string
+}
+
+export default function createUserAgentMiddleware(
+  options: UserAgentMiddlewareOptions
+): Middleware {
+  const userAgent = createHttpUserAgent({
+    name: 'commercetools-js-sdk',
+    ...options,
+  })
+
+  return (next: Dispatch): Dispatch => (
+    request: MiddlewareRequest,
+    response: MiddlewareResponse
+  ) => {
+    const requestWithUserAgent = {
+      ...request,
+      headers: {
+        ...request.headers,
+        'User-Agent': userAgent,
+      },
+    }
+    next(requestWithUserAgent, response)
+  }
+}
\ No newline at end of file
diff --git a/types/sdk.d.ts b/packages/sdk-client/src/types/sdk.d.ts
similarity index 89%
rename from types/sdk.d.ts
rename to packages/sdk-client/src/types/sdk.d.ts
index 3c4fb29c4..3ec699615 100644
--- a/types/sdk.d.ts
+++ b/packages/sdk-client/src/types/sdk.d.ts
@@ -1,4 +1,10 @@
 export type JsonObject<T = unknown> = { [key: string]: T }
+export type Nullable<T> = T | null;
+export type Credentials = {
+  clientId: string
+  clientSecret: string
+  anonymousId?: string
+}
 
 export type MethodType =
   | 'ACL'
@@ -36,6 +42,25 @@ export type MethodType =
   | 'UNLOCK'
   | 'UNSUBSCRIBE'
 
+export type QueryParam =
+  | string
+  | string[]
+  | number
+  | number[]
+  | boolean
+  | boolean[]
+  | undefined
+
+export type VariableMap = {
+  [key: string]: QueryParam
+}
+
+export type RequestOptions = {
+  [key: string]: any
+}
+
+export type executeRequest = (request: ClientRequest) => Promise<ClientResponse>
+
 export type HttpErrorType = {
   name: string
   message: string
@@ -67,14 +92,26 @@ export type Dispatch = (
 ) => unknown
 
 export type Middleware = (next: Dispatch) => Dispatch
-
-/* Client */
-export type ClientRequest = {
-  uri: string
+export interface ClientRequest {
+  baseUri?: string
+  uri?: string
+  headers?: VariableMap
   method: MethodType
-  body?: string | JsonObject
+  uriTemplate?: string
+  pathVariables?: VariableMap
+  queryParams?: VariableMap
+  body?: any,
+}
+
+export type ClientResponse<T = any> = {
+  body?: T
+  statusCode?: number
   headers?: JsonObject<string>
+  error?: HttpErrorType
+  request?: Object
 }
+
+
 export type AuthRequest = {
   uri: string
   body: string
@@ -83,13 +120,6 @@ export type AuthRequest = {
   headers?: JsonObject<string>
 }
 
-export type ClientResponse = {
-  body?: Object
-  error?: HttpErrorType
-  statusCode: number
-  headers?: JsonObject<string>
-  request?: Object
-}
 
 export type SuccessResult = {
   body: {
@@ -129,14 +159,10 @@ export type ClientOptions = {
 export type AuthMiddlewareOptions = {
   host: string
   projectKey: string
-  credentials: {
-    clientId: string
-    clientSecret: string
-    anonymousId?: string
-  }
-  scopes: Array<string>
+  credentials: Credentials
+  scopes?: Array<string>
   // For internal usage only
-  oauthUri: string
+  oauthUri?: string
   fetch?: typeof fetch
   tokenCache?: TokenCache
 }
@@ -180,6 +206,21 @@ export type TokenInfo = {
   token_type?: string
 }
 
+export type AnonymousAuthMiddlewareOptions = {
+  host: string
+  projectKey: string
+  credentials: {
+    clientId: string
+    clientSecret: string
+    anonymousId: string
+  }
+  scopes?: Array<string>
+  // For internal usage only
+  oauthUri?: string
+  fetch?: typeof fetch
+  tokenCache?: TokenCache
+}
+
 export type RefreshAuthMiddlewareOptions = {
   host: string
   projectKey: string
@@ -189,7 +230,7 @@ export type RefreshAuthMiddlewareOptions = {
   }
   refreshToken: string
   // For internal usage only
-  oauthUri: string
+  oauthUri?: string
   fetch?: typeof fetch
 }
 
@@ -258,9 +299,9 @@ export type PasswordAuthMiddlewareOptions = {
     clientSecret: string
     user: UserAuthOptions
   }
-  scopes: Array<string>
+  scopes?: Array<string>
   // For internal usage only
-  oauthUri: string
+  oauthUri?: string
   fetch?: typeof fetch
 }
 
@@ -281,7 +322,7 @@ export type HttpMiddlewareOptions = {
   }
   fetch?: typeof fetch
   abortController?: AbortController // deprecated
-  getAbortController: () => AbortController
+  getAbortController?: () => AbortController
 }
 export type QueueMiddlewareOptions = {
   concurrency: number
diff --git a/packages/sdk-middleware-auth/test/anonymous-session-flow.test.ts b/packages/sdk-client/test/auth.test/anonymous-session-flow.test.ts
similarity index 87%
rename from packages/sdk-middleware-auth/test/anonymous-session-flow.test.ts
rename to packages/sdk-client/test/auth.test/anonymous-session-flow.test.ts
index 76626b693..81957d137 100644
--- a/packages/sdk-middleware-auth/test/anonymous-session-flow.test.ts
+++ b/packages/sdk-client/test/auth.test/anonymous-session-flow.test.ts
@@ -1,8 +1,8 @@
-import { createAuthMiddlewareForAnonymousSessionFlow } from '../src'
+import { createAuthMiddlewareForAnonymousSessionFlow } from '../../src/sdk-middleware-auth'
 
-import authMiddlewareBase from '../src/base-auth-flow'
+import authMiddlewareBase from '../../src/sdk-middleware-auth/base-auth-flow'
 
-jest.mock('../src/base-auth-flow')
+jest.mock('../../src/sdk-middleware-auth/base-auth-flow')
 
 function createTestRequest(options) {
   return {
@@ -48,7 +48,7 @@ describe('Anonymous Session Flow', () => {
         )
         expect(actualParams.basicAuth).toBe('MTIzOnNlY3JldA==')
         expect(authMiddlewareBase).toHaveBeenCalledTimes(1)
-        jest.unmock('../src/base-auth-flow')
+        jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
         resolve(null)
       }
       const middlewareOptions = createTestMiddlewareOptions(null)
diff --git a/packages/sdk-middleware-auth/test/base-auth-flow.test.ts b/packages/sdk-client/test/auth.test/base-auth-flow.test.ts
similarity index 98%
rename from packages/sdk-middleware-auth/test/base-auth-flow.test.ts
rename to packages/sdk-client/test/auth.test/base-auth-flow.test.ts
index f7b37880d..705816a67 100644
--- a/packages/sdk-middleware-auth/test/base-auth-flow.test.ts
+++ b/packages/sdk-client/test/auth.test/base-auth-flow.test.ts
@@ -1,8 +1,8 @@
 import nock from 'nock'
 import fetch from 'node-fetch'
-import createAuthMiddlewareBase from '../src/base-auth-flow'
-import * as buildRequests from '../src/build-requests'
-import store from '../src/utils'
+import createAuthMiddlewareBase from '../../src/sdk-middleware-auth/base-auth-flow'
+import * as buildRequests from '../../src/sdk-middleware-auth/build-requests'
+import store from '../../src/sdk-middleware-auth/utils'
 
 function createTestRequest(options) {
   return {
diff --git a/packages/sdk-middleware-auth/test/build-requests.test.ts b/packages/sdk-client/test/auth.test/build-requests.test.ts
similarity index 98%
rename from packages/sdk-middleware-auth/test/build-requests.test.ts
rename to packages/sdk-client/test/auth.test/build-requests.test.ts
index de4ce122f..267a41ded 100644
--- a/packages/sdk-middleware-auth/test/build-requests.test.ts
+++ b/packages/sdk-client/test/auth.test/build-requests.test.ts
@@ -4,8 +4,8 @@ import {
   buildRequestForPasswordFlow,
   buildRequestForRefreshTokenFlow,
   buildRequestForAnonymousSessionFlow,
-} from '../src/build-requests'
-import * as scopes from '../src/scopes'
+} from '../../src/sdk-middleware-auth/build-requests'
+import * as scopes from '../../src/sdk-middleware-auth/scopes'
 
 const allScopes = Object.keys(scopes).map(key => scopes[key])
 
@@ -21,7 +21,7 @@ function createTestOptions(options) {
         password: 'verysecurepassword',
       },
     },
-    scopes: allScopes,
+    scopes: Object.values(scopes),
     ...options,
   }
 }
@@ -234,7 +234,7 @@ describe('buildRequestForRefreshTokenFlow', () => {
       clientSecret: 'secret',
     },
     refreshToken: 'foobar123',
-    scopes: undefined,
+    scopes: allScopes,
   }
   test('build request values with all the given options', () => {
     const options = createTestOptions(mockCred)
diff --git a/packages/sdk-middleware-auth/test/client-crendentials-test.ts b/packages/sdk-client/test/auth.test/client-crendentials-test.ts
similarity index 89%
rename from packages/sdk-middleware-auth/test/client-crendentials-test.ts
rename to packages/sdk-client/test/auth.test/client-crendentials-test.ts
index 5ce40cbb5..98fe6cffb 100644
--- a/packages/sdk-middleware-auth/test/client-crendentials-test.ts
+++ b/packages/sdk-client/test/auth.test/client-crendentials-test.ts
@@ -1,7 +1,7 @@
-import { createAuthMiddlewareForClientCredentialsFlow } from '../src'
-import authMiddlewareBase from '../src/base-auth-flow'
+import { createAuthMiddlewareForClientCredentialsFlow } from '../../src/sdk-middleware-auth'
+import authMiddlewareBase from '../../src/sdk-middleware-auth/base-auth-flow'
 
-jest.mock('../src/base-auth-flow')
+jest.mock('../../src/sdk-middleware-auth/base-auth-flow')
 
 function createTestRequest(options) {
   return {
@@ -30,7 +30,7 @@ describe('Client Crentials Flow', () => {
     jest.resetAllMocks()
   })
   afterAll(() => {
-    jest.unmock('../src/base-auth-flow')
+    jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
   })
   test('should call the base-auth-flow method with the right params', () =>
     new Promise((resolve, reject) => {
@@ -58,7 +58,7 @@ describe('Client Crentials Flow', () => {
         })
         expect(authMiddlewareBase).toHaveBeenCalledTimes(1)
         resolve(null)
-        jest.unmock('../src/base-auth-flow')
+        jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
       }
       const middlewareOptions = createTestMiddlewareOptions(null)
       const authMiddleware = createAuthMiddlewareForClientCredentialsFlow(
@@ -98,7 +98,7 @@ describe('Client Crentials Flow', () => {
         })
         expect(authMiddlewareBase).toHaveBeenCalledTimes(1)
         resolve(null)
-        jest.unmock('../src/base-auth-flow')
+        jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
       }
       const middlewareOptions = createTestMiddlewareOptions({
         fetch,
diff --git a/packages/sdk-middleware-auth/test/existing-token.test.ts b/packages/sdk-client/test/auth.test/existing-token.test.ts
similarity index 97%
rename from packages/sdk-middleware-auth/test/existing-token.test.ts
rename to packages/sdk-client/test/auth.test/existing-token.test.ts
index 19bb5ae2a..bb0ee0393 100644
--- a/packages/sdk-middleware-auth/test/existing-token.test.ts
+++ b/packages/sdk-client/test/auth.test/existing-token.test.ts
@@ -1,4 +1,4 @@
-import { createAuthMiddlewareWithExistingToken } from '../src'
+import { createAuthMiddlewareWithExistingToken } from '../../src/sdk-middleware-auth'
 
 describe('Existing Token', () => {
   const response = {
diff --git a/packages/sdk-middleware-auth/test/password-flow.test.ts b/packages/sdk-client/test/auth.test/password-flow.test.ts
similarity index 83%
rename from packages/sdk-middleware-auth/test/password-flow.test.ts
rename to packages/sdk-client/test/auth.test/password-flow.test.ts
index cb96e74c7..0bcf10b83 100644
--- a/packages/sdk-middleware-auth/test/password-flow.test.ts
+++ b/packages/sdk-client/test/auth.test/password-flow.test.ts
@@ -1,13 +1,13 @@
-import { createAuthMiddlewareForPasswordFlow } from '../src'
+import { createAuthMiddlewareForPasswordFlow } from '../../src/sdk-middleware-auth'
 
-import authMiddlewareBase from '../src/base-auth-flow'
+import authMiddlewareBase from '../../src/sdk-middleware-auth/base-auth-flow'
 
 /**
  * required to be at the root because Jest hoists it above all requires,
  * if in any method like `beforeAll`,
  * it will be hoisted within the scope of that method
  */
-jest.mock('../src/base-auth-flow')
+jest.mock('../../src/sdk-middleware-auth/base-auth-flow')
 
 function createTestRequest(options) {
   return {
@@ -37,7 +37,7 @@ function createTestMiddlewareOptions(options) {
 
 describe('Password Flow', () => {
   afterAll(() => {
-    jest.unmock('../src/base-auth-flow')
+    jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
   })
   test('should call the base-auth-flow method with the right params', () =>
     new Promise((resolve, reject) => {
@@ -60,7 +60,7 @@ describe('Password Flow', () => {
           basicAuth: 'MTIzOnNlY3JldA==',
         })
         expect(authMiddlewareBase).toHaveBeenCalledTimes(1)
-        jest.unmock('../src/base-auth-flow')
+        jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
         resolve(null)
       }
       const middlewareOptions = createTestMiddlewareOptions(null)
diff --git a/packages/sdk-middleware-auth/test/refresh-token-flow.test.ts b/packages/sdk-client/test/auth.test/refresh-token-flow.test.ts
similarity index 81%
rename from packages/sdk-middleware-auth/test/refresh-token-flow.test.ts
rename to packages/sdk-client/test/auth.test/refresh-token-flow.test.ts
index 1c13024dc..be79bec21 100644
--- a/packages/sdk-middleware-auth/test/refresh-token-flow.test.ts
+++ b/packages/sdk-client/test/auth.test/refresh-token-flow.test.ts
@@ -1,7 +1,7 @@
-import { createAuthMiddlewareForRefreshTokenFlow } from '../src'
-import authMiddlewareBase from '../src/base-auth-flow'
+import { createAuthMiddlewareForRefreshTokenFlow } from '../../src/sdk-middleware-auth'
+import authMiddlewareBase from '../../src/sdk-middleware-auth/base-auth-flow'
 
-jest.mock('../src/base-auth-flow')
+jest.mock('../../src/sdk-middleware-auth/base-auth-flow')
 
 function createTestRequest(options) {
   return {
@@ -28,7 +28,7 @@ function createTestMiddlewareOptions(options) {
 
 describe('Refresh Token Flow', () => {
   afterAll(() => {
-    jest.unmock('../src/base-auth-flow')
+    jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
   })
   test('should call the base-auth-flow method with the right params', () =>
     new Promise((resolve, reject) => {
@@ -52,7 +52,7 @@ describe('Refresh Token Flow', () => {
         })
         expect(authMiddlewareBase).toHaveBeenCalledTimes(1)
         resolve(null)
-        jest.unmock('../src/base-auth-flow')
+        jest.unmock('../../src/sdk-middleware-auth/base-auth-flow')
       }
       const middlewareOptions = createTestMiddlewareOptions(null)
       const authMiddleware = createAuthMiddlewareForRefreshTokenFlow(
diff --git a/packages/sdk-client/test/builder.test/client-builder.test.ts b/packages/sdk-client/test/builder.test/client-builder.test.ts
new file mode 100644
index 000000000..c70477c73
--- /dev/null
+++ b/packages/sdk-client/test/builder.test/client-builder.test.ts
@@ -0,0 +1,61 @@
+import ClientBuilder from '../../src/builder/ClientBuilder';
+require('dotenv').config();
+
+export const projectKey = 'demo'
+const fetch = require('node-fetch');
+
+describe('client builder', () => {
+  const authMiddlewareOptions = {
+    host: 'https://auth.europe-west1.gcp.commercetools.com',
+    projectKey: process.env.PROJECT_KEY || projectKey,
+    credentials: {
+      clientId: process.env.CTP_CLIENT_ID || '',
+      clientSecret: process.env.CTP_CLIENT_SECRET || '',
+    },
+    oauthUri: process.env.OAUTH_URL || '',
+    scopes: ['manage_project:demo-1'],
+    fetch,
+  };
+
+  const httpMiddlewareOptions = {
+    host: 'https://api.europe-west1.gcp.commercetools.com',
+    fetch
+  }
+
+  test('should set the projectKey', () => {
+    const client = new ClientBuilder() as any
+    expect(client.projectKey).toEqual(undefined)
+    const clientWithKeyProp = client.withProjectKey(projectKey)
+
+    expect(clientWithKeyProp.projectKey).toEqual('demo')
+  })
+
+  test('should set authorization middleware', () => {
+    const client = new ClientBuilder() as any;
+    expect(client.authMiddleware).toEqual(undefined)
+    const clientWithKeyProp = client.withClientCredentialsFlow(authMiddlewareOptions)
+
+    expect(clientWithKeyProp.authMiddleware).toBeTruthy()
+  })
+
+  test('should set the http middleware', () => {
+    const client = new ClientBuilder() as any;
+    expect(client.httpMiddleware).toEqual(undefined)
+    const clientWithKeyProp = client.withHttpMiddleware(httpMiddlewareOptions);
+
+    expect(clientWithKeyProp.httpMiddleware).toBeTruthy()
+  })
+
+  test('should build the client when build method is called', () => {
+    const client = new ClientBuilder()
+      .withHttpMiddleware(httpMiddlewareOptions)
+      .withClientCredentialsFlow(authMiddlewareOptions)
+      .build() as any;
+
+    expect(client).toHaveProperty('execute');
+    expect(client).toHaveProperty('process');
+
+    expect(typeof client.execute).toEqual('function')
+    expect(typeof client.process).toEqual('function')
+  })
+})
diff --git a/packages/sdk-client/test/sdk-client.test.ts b/packages/sdk-client/test/client.test/sdk-client.test.ts
similarity index 99%
rename from packages/sdk-client/test/sdk-client.test.ts
rename to packages/sdk-client/test/client.test/sdk-client.test.ts
index fa7d828af..64c5a912a 100644
--- a/packages/sdk-client/test/sdk-client.test.ts
+++ b/packages/sdk-client/test/client.test/sdk-client.test.ts
@@ -1,10 +1,10 @@
 import qs from 'querystring'
-import { createClient } from '../src'
+import { createClient } from '../../src/sdk-client'
 import {
   ClientRequest,
   HttpErrorType,
   MiddlewareResponse,
-} from '../../../types/sdk'
+} from '../../src/types/sdk.d'
 
 const createPayloadResult = (tot, startingId = 0) => ({
   count: tot,
diff --git a/packages/sdk-client/test/correlation.test/correlation-id.test.ts b/packages/sdk-client/test/correlation.test/correlation-id.test.ts
new file mode 100644
index 000000000..9e4e0df32
--- /dev/null
+++ b/packages/sdk-client/test/correlation.test/correlation-id.test.ts
@@ -0,0 +1,49 @@
+import { createCorrelationIdMiddleware } from '../../src/sdk-middleware-correlation-id'
+
+function createTestRequest(options) {
+  return {
+    uri: '',
+    method: 'GET',
+    body: null,
+    headers: {},
+    ...options,
+  }
+}
+
+function createTestResponse(options) {
+  return {
+    ...options,
+  }
+}
+
+describe('correlation id test', () => {
+  const correlationId = 'abc-def-123'
+  const middlewareOptions = {
+    generate: jest.fn(() => correlationId),
+  }
+  const request = createTestRequest({
+    headers: {
+      Authorization: '123',
+    },
+  })
+  const response = createTestResponse(null)
+  const correlationIdMiddleware = createCorrelationIdMiddleware(
+    middlewareOptions
+  )
+
+  const next = (req) => {
+    test('retains existing headers', () => {
+      expect(req.headers.Authorization).toBe('123')
+    })
+
+    test('adds an `X-Correlation-ID` header', () => {
+      expect(req.headers['X-Correlation-ID']).toBe(correlationId)
+    })
+
+    test('invokes `generate` on the middleware options', () => {
+      expect(middlewareOptions.generate).toHaveBeenCalled()
+    })
+  }
+
+  correlationIdMiddleware(next)(request, response)
+})
diff --git a/packages/sdk-client/test/create-user-agent.test/user-agent.test.ts b/packages/sdk-client/test/create-user-agent.test/user-agent.test.ts
new file mode 100644
index 000000000..2064c2f92
--- /dev/null
+++ b/packages/sdk-client/test/create-user-agent.test/user-agent.test.ts
@@ -0,0 +1,153 @@
+import createHttpUserAgent from '../../src/http-user-agent/create-user-agent'
+
+const userAgentBrowser =
+  'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36'
+
+describe('for browser', () => {
+  const originalWindow = global.window
+  global.window = {
+    // @ts-ignore
+    document: {
+      nodeType: 9,
+    },
+    // @ts-ignore
+    navigator: {
+      userAgent: userAgentBrowser,
+    },
+  }
+  const userAgent = createHttpUserAgent({
+    name: 'commercetools-node-sdk',
+    version: '1.0.0',
+    libraryName: 'my-awesome-library',
+    libraryVersion: '1.0.0',
+    contactUrl: 'https://commercetools.com',
+    contactEmail: 'helpdesk@commercetools.com',
+  })
+  // Reset original `global.window`
+  global.window = originalWindow
+
+  test('has sdk info', () => {
+    expect(userAgent).toMatch('commercetools-node-sdk/1.0.0')
+  })
+  test('has browser info', () => {
+    // because we use jsdom
+    expect(userAgent).toMatch(userAgentBrowser)
+  })
+  test('has library info', () => {
+    expect(userAgent).toMatch('my-awesome-library/1.0.0')
+  })
+  test('has library url', () => {
+    expect(userAgent).toMatch('https://commercetools.com')
+  })
+  test('has contact info', () => {
+    expect(userAgent).toMatch('helpdesk@commercetools.com')
+  })
+})
+
+describe('for node', () => {
+  const userAgent = createHttpUserAgent({
+    name: 'commercetools-node-sdk',
+    version: '1.0.0',
+    libraryName: 'my-awesome-library',
+    libraryVersion: '1.0.0',
+    contactUrl: 'https://commercetools.com',
+    contactEmail: 'helpdesk@commercetools.com',
+  })
+
+  test('has sdk info', () => {
+    expect(userAgent).toMatch('commercetools-node-sdk/1.0.0')
+  })
+  test('has node info', () => {
+    expect(userAgent).toMatch(`Node.js/${process.version.slice(1)}`)
+  })
+  test('has library info', () => {
+    expect(userAgent).toMatch('my-awesome-library/1.0.0')
+  })
+  test('has library url', () => {
+    expect(userAgent).toMatch('https://commercetools.com')
+  })
+  test('has contact info', () => {
+    expect(userAgent).toMatch('helpdesk@commercetools.com')
+  })
+})
+
+describe('validation', () => {
+  test('throws if options is undefined', () => {
+    expect(() => createHttpUserAgent(null)).toThrow(
+      'Missing required option `name`'
+    )
+  })
+  test('throws if options is empty', () => {
+    expect(() => createHttpUserAgent(null)).toThrow(
+      'Missing required option `name`'
+    )
+  })
+  test('throws if options is missing name', () => {
+    // @ts-ignore
+    expect(() => createHttpUserAgent({ foo: 'bar' })).toThrow(
+      'Missing required option `name`'
+    )
+  })
+})
+
+describe('optional information', () => {
+  test('create user agent with only library name (missing version)', () => {
+    const userAgent = createHttpUserAgent({
+      name: 'commercetools-node-sdk',
+      libraryName: 'my-awesome-library',
+    })
+    expect(userAgent).toBe(
+      `commercetools-node-sdk Node.js/${process.version.slice(1)} (${
+        process.platform
+      }; ${process.arch}) my-awesome-library`
+    )
+  })
+  test('create user agent with library name and version', () => {
+    const userAgent = createHttpUserAgent({
+      name: 'commercetools-node-sdk',
+      libraryName: 'my-awesome-library',
+      libraryVersion: '1.0.0',
+    })
+    expect(userAgent).toBe(
+      `commercetools-node-sdk Node.js/${process.version.slice(1)} (${
+        process.platform
+      }; ${process.arch}) my-awesome-library/1.0.0`
+    )
+  })
+  test('create user agent with contact url', () => {
+    const userAgent = createHttpUserAgent({
+      name: 'commercetools-node-sdk',
+      contactUrl: 'https://commercetools.com',
+    })
+    expect(userAgent).toBe(
+      `commercetools-node-sdk Node.js/${process.version.slice(1)} (${
+        process.platform
+      }; ${process.arch}) (+https://commercetools.com)`
+    )
+  })
+  test('create user agent with contact email', () => {
+    const userAgent = createHttpUserAgent({
+      name: 'commercetools-node-sdk',
+      contactEmail: 'helpdesk@commercetools.com',
+    })
+    expect(userAgent).toBe(
+      `commercetools-node-sdk Node.js/${process.version.slice(1)} (${
+        process.platform
+      }; ${process.arch}) (+helpdesk@commercetools.com)`
+    )
+  })
+  test('create user agent with full contact info', () => {
+    const userAgent = createHttpUserAgent({
+      name: 'commercetools-node-sdk',
+      contactUrl: 'https://commercetools.com',
+      contactEmail: 'helpdesk@commercetools.com',
+    })
+    expect(userAgent).toBe(
+      `commercetools-node-sdk Node.js/${process.version.slice(1)} (${
+        process.platform
+      }; ${
+        process.arch
+      }) (+https://commercetools.com; +helpdesk@commercetools.com)`
+    )
+  })
+})
diff --git a/packages/sdk-middleware-http/test/error.test.ts b/packages/sdk-client/test/http.test/error.test.ts
similarity index 97%
rename from packages/sdk-middleware-http/test/error.test.ts
rename to packages/sdk-client/test/http.test/error.test.ts
index 054adcc58..d39a221e5 100644
--- a/packages/sdk-middleware-http/test/error.test.ts
+++ b/packages/sdk-client/test/http.test/error.test.ts
@@ -8,7 +8,7 @@ import getErrorByCode, {
     ConcurrentModification,
     InternalServerError,
     ServiceUnavailable,
-  } from '../src/errors';
+  } from '../../src/sdk-client/errors';
   
   describe('errors', () => {
     test('map error type by status code (BadRequest)', () => {
diff --git a/packages/sdk-middleware-http/test/http.test.ts b/packages/sdk-client/test/http.test/http.test.ts
similarity index 99%
rename from packages/sdk-middleware-http/test/http.test.ts
rename to packages/sdk-client/test/http.test/http.test.ts
index 059c9e1fb..3b301a3b8 100644
--- a/packages/sdk-middleware-http/test/http.test.ts
+++ b/packages/sdk-client/test/http.test/http.test.ts
@@ -1,9 +1,8 @@
-// eslint-disable-next-line import/no-extraneous-dependencies
 import nock from 'nock'
 import fetch from 'node-fetch'
 import AbortController from 'abort-controller'
-import { createHttpMiddleware } from '../src'
-import { MiddlewareRequest, JsonObject, MiddlewareResponse } from '../../../types/sdk'
+import { createHttpMiddleware } from '../../src/sdk-middleware-http'
+import { MiddlewareRequest, MiddlewareResponse } from '../../src/types/sdk.d'
 
 function createTestRequest(options) {
   return {
@@ -106,7 +105,7 @@ describe('Http', () => {
         uri: '/foo/bar',
       })
       const response = { resolve: Function, reject: Function } as any;
-      const next = (req: JsonObject, res: JsonObject) => {
+      const next = (req: MiddlewareRequest, res: MiddlewareResponse) => {
         expect(res).toEqual({
           ...response,
           body: { foo: 'bar' },
diff --git a/packages/sdk-middleware-http/test/parse-headers.test.ts b/packages/sdk-client/test/http.test/parse-headers.test.ts
similarity index 88%
rename from packages/sdk-middleware-http/test/parse-headers.test.ts
rename to packages/sdk-client/test/http.test/parse-headers.test.ts
index 01bda3596..05f68ea6f 100644
--- a/packages/sdk-middleware-http/test/parse-headers.test.ts
+++ b/packages/sdk-client/test/http.test/parse-headers.test.ts
@@ -1,4 +1,4 @@
-import parseHeaders from '../src/parse-headers'
+import parseHeaders from '../../src/sdk-middleware-http/parse-headers'
 
 describe('Parse headers', () => {
   test('return headers for polyfill (node-fetch)', () => {
diff --git a/packages/sdk-client/test/logger.test/logger.test.ts b/packages/sdk-client/test/logger.test/logger.test.ts
new file mode 100644
index 000000000..488d05c61
--- /dev/null
+++ b/packages/sdk-client/test/logger.test/logger.test.ts
@@ -0,0 +1,58 @@
+import { createLoggerMiddleware } from '../../src/sdk-middleware-logger'
+
+function createTestRequest(options) {
+  return {
+    uri: '',
+    method: 'GET',
+    body: null,
+    headers: {},
+    ...options,
+  }
+}
+
+function createTestResponse(options) {
+  return {
+    ...options,
+  }
+}
+const originalConsoleLog = console.log
+
+describe('Logger', () => {
+  beforeEach(() => {
+    // Mock `console.log`
+    console.log = jest.fn()
+  })
+
+  afterEach(() => {
+    // Reset original `console.log`
+    console.log = originalConsoleLog
+  })
+
+  test('log request / response', () => {
+    const request = createTestRequest({
+      uri: '/foo/bar',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    })
+    const response = createTestResponse({
+      resolve: jest.fn(),
+      reject: jest.fn(),
+      statusCode: 200,
+      body: { foo: 'bar' },
+      error: new Error('Oops'),
+    })
+    const loggerMiddleware = createLoggerMiddleware()
+
+    const next = () => {
+      expect(console.log).toHaveBeenCalledTimes(2)
+      expect(console.log).toHaveBeenCalledWith('Request: ', request)
+      expect(console.log).toHaveBeenCalledWith('Response: ', {
+        statusCode: response.statusCode,
+        body: response.body,
+        error: response.error,
+      })
+    }
+    loggerMiddleware(next)(request, response)
+  })
+})
diff --git a/packages/sdk-client/test/queue.test/queue.test.ts b/packages/sdk-client/test/queue.test/queue.test.ts
new file mode 100644
index 000000000..f5e9c8a0d
--- /dev/null
+++ b/packages/sdk-client/test/queue.test/queue.test.ts
@@ -0,0 +1,115 @@
+import { createQueueMiddleware } from '../../src/sdk-middleware-queue'
+
+function createTestRequest(options) {
+  return {
+    uri: '',
+    method: 'GET',
+    body: null,
+    headers: {},
+    ...options,
+  }
+}
+
+function createTestResponse(options) {
+  return {
+    ...options,
+  }
+}
+
+function createTestMiddlewareOptions(options) {
+  return {
+    ...options,
+  }
+}
+
+describe('Queue', () => {
+  test('correctly enqueue / resolve tasks based on concurrency', () =>
+    new Promise((resolve) => {
+      const request = createTestRequest({
+        uri: '/foo/bar',
+      })
+      const resolveSpy = jest.fn()
+      const rejectSpy = jest.fn()
+      const response = createTestResponse({
+        resolve: resolveSpy,
+        reject: rejectSpy,
+      })
+      const middlewareOptions = createTestMiddlewareOptions({ concurrency: 2 })
+      const queueMiddleware = createQueueMiddleware(middlewareOptions)
+      let count = 0
+      const responseArgs = []
+      const nextCount = (req, res) => {
+        count += 1
+        responseArgs.push(res)
+      }
+
+      // Trigger multiple concurrent dispatches (with max concurrency 2)
+      queueMiddleware(nextCount)(request, response)
+      queueMiddleware(nextCount)(request, response)
+      // First 2 tasks should be dispatched straight away
+      expect(count).toBe(2)
+      // Dispatch new tasks, they won't be executed though
+      queueMiddleware(nextCount)(request, response)
+      queueMiddleware(nextCount)(request, response)
+      // Until running tasks are resolved, no more task should run
+      expect(count).toBe(2)
+      // Resolve the first task. We expect a new task to be dispatched since
+      // there is a free slot
+      responseArgs[0].resolve()
+      expect(count).toBe(3)
+      // Reject the second task. We expect a new task to be dispatched since
+      // there is a free slot
+      responseArgs[1].reject()
+      expect(count).toBe(4)
+      // Trigger the remaining tasks
+      responseArgs[2].resolve()
+      responseArgs[3].reject()
+      expect(resolveSpy).toHaveBeenCalledTimes(2)
+      expect(rejectSpy).toHaveBeenCalledTimes(2)
+      // All good, end the test
+      resolve(null)
+    }))
+
+  test('dispatch incoming tasks with default concurrency', () =>
+    new Promise((resolve) => {
+      const request = createTestRequest({
+        uri: '/foo/bar',
+      })
+      const response = createTestResponse(null)
+      const middlewareOptions = createTestMiddlewareOptions(null)
+      const queueMiddleware = createQueueMiddleware(middlewareOptions)
+      const nextSpy = jest.fn()
+
+      // Trigger multiple concurrent dispatches (default 20)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      // 5
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      // 10
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      // 15
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      queueMiddleware(nextSpy)(request, response)
+      // 20
+      queueMiddleware(nextSpy)(request, response)
+
+      expect(nextSpy).toHaveBeenCalledTimes(20)
+
+      // All good, end the test
+      resolve(null)
+    }))
+})
diff --git a/packages/sdk-client/test/user-agent.test/user-agent.test.ts b/packages/sdk-client/test/user-agent.test/user-agent.test.ts
new file mode 100644
index 000000000..0edc15357
--- /dev/null
+++ b/packages/sdk-client/test/user-agent.test/user-agent.test.ts
@@ -0,0 +1,60 @@
+import {
+  Dispatch,
+  MiddlewareRequest,
+  MiddlewareResponse,
+  JsonObject,
+} from '../../src/types/sdk.d'
+import { createUserAgentMiddleware } from '../../src/sdk-middleware-user-agent'
+
+describe('UserAgent', () => {
+  const userAgentMiddleware = createUserAgentMiddleware({
+    libraryName: 'my-awesome-library',
+    libraryVersion: '1.0.0',
+    contactUrl: 'https://commercetools.com',
+    contactEmail: 'helpdesk@commercetools.com',
+  })
+  const request: MiddlewareRequest = {
+    method: 'GET',
+    uri: '/foo',
+    headers: {
+      Authorization: '123',
+    },
+  }
+  const response: MiddlewareResponse = {
+    statusCode: 200,
+    resolve: jest.fn(),
+    reject: jest.fn(),
+  }
+
+  const next: Dispatch = (req, res) => {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const headers: JsonObject<string> = req.headers as any
+    test('has the same given header', () => {
+      expect(headers.Authorization).toBe('123')
+    })
+    test('has sdk info', () => {
+      expect(headers['User-Agent']).toMatch('commercetools-js-sdk')
+    })
+    test('has browser info', () => {
+      // because we use jsdom
+      expect(headers['User-Agent']).toMatch('Node.js')
+    })
+    test('has browser version', () => {
+      // because we use jsdom
+      expect(headers['User-Agent']).toMatch(process.version.slice(1))
+    })
+    test('has library info', () => {
+      expect(headers['User-Agent']).toMatch('my-awesome-library/1.0.0')
+    })
+    test('has library url', () => {
+      expect(headers['User-Agent']).toMatch('https://commercetools.com')
+    })
+    test('has contact info', () => {
+      expect(headers['User-Agent']).toMatch('helpdesk@commercetools.com')
+    })
+    test('do not change response object', () => {
+      expect(res).toEqual({ ...res })
+    })
+  }
+  userAgentMiddleware(next)(request, response)
+})
\ No newline at end of file
diff --git a/packages/sdk-client/tsconfig.json b/packages/sdk-client/tsconfig.json
index 3df9d126b..62eb9ec22 100644
--- a/packages/sdk-client/tsconfig.json
+++ b/packages/sdk-client/tsconfig.json
@@ -1,74 +1,12 @@
 {
   "compilerOptions": {
-    /* Visit https://aka.ms/tsconfig.json to read more about this file */
-
-    /* Basic Options */
-    // "incremental": true,                         /* Enable incremental compilation */
-    "target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', 'ES2021', or 'ESNEXT'. */,
-    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
-    // "lib": [],                                   /* Specify library files to be included in the compilation. */
-    "allowJs": true /* Allow javascript files to be compiled. */,
-    // "checkJs": true,                             /* Report errors in .js files. */
-    // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
-    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
-    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
-    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
-    // "outFile": "./",                             /* Concatenate and emit output to single file. */
-    "outDir": "dist" /* Redirect output structure to the directory. */,
-    "rootDir": "src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
-    // "composite": true,                           /* Enable project compilation */
-    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
-    "removeComments": false /* Do not emit comments to output. */,
-    // "noEmit": true,                              /* Do not emit outputs. */
-    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
-    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-
-    /* Strict Type-Checking Options */
-    "strict": true /* Enable all strict type-checking options. */,
-    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
-    // "strictNullChecks": true,                    /* Enable strict null checks. */
-    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
-    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
-    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
-    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
-    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
-
-    /* Additional Checks */
-    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
-    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
-    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
-    // "noImplicitOverride": true,                  /* Ensure overriding members in derived classes are marked with an 'override' modifier. */
-    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
-
-    /* Module Resolution Options */
-    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
-    "baseUrl": "." /* Base directory to resolve non-absolute module names. */,
-    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
-    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                             /* List of folders to include type definitions from. */
-    // "types": [],                                 /* Type declaration files to be included in compilation. */
-    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
-    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
-    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
-
-    /* Source Map Options */
-    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
-    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
-    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-
-    /* Experimental Options */
-    // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
-    // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */
-
-    /* Advanced Options */
-    "skipLibCheck": true /* Skip type checking of declaration files. */,
-    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
+    "module": "CommonJS",
+    "target": "ES5",
+    "moduleResolution": "node",
+    "removeComments": false,
+    "outDir": "dist",
+    "baseUrl": ".",
+    "esModuleInterop": true
   },
-  "include": ["./src/**/*"],
-  "exclude": ["./test/*.test.ts"]
+  "include": ["./src/**/*"]
 }
diff --git a/packages/sdk-middleware-auth/README.md b/packages/sdk-middleware-auth/README.md
deleted file mode 100644
index b7c9a1ba9..000000000
--- a/packages/sdk-middleware-auth/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# `sdk-middleware-auth`
diff --git a/packages/sdk-middleware-auth/jest.config.js b/packages/sdk-middleware-auth/jest.config.js
deleted file mode 100644
index 8aef1fc73..000000000
--- a/packages/sdk-middleware-auth/jest.config.js
+++ /dev/null
@@ -1,23 +0,0 @@
-module.exports = {
-  preset: 'ts-jest',
-  testEnvironment: 'node',
-  collectCoverage: true,
-  coverageDirectory: 'coverage',
-  testPathIgnorePatterns: [
-    "/node_modules/"
-  ],
-  verbose: true,
-  coverageThreshold: {
-    global: {
-      // branches: 100,
-      // lines: 100,
-      // functions: 100,
-      statements: 90
-    }
-  },
-  globals: {
-    'ts-jest': {
-      diagnostics: false,
-    }
-  }
-}
diff --git a/packages/sdk-middleware-auth/package.json b/packages/sdk-middleware-auth/package.json
deleted file mode 100644
index 30b016a68..000000000
--- a/packages/sdk-middleware-auth/package.json
+++ /dev/null
@@ -1,41 +0,0 @@
-{
-  "name": "@commercetools/sdk-middleware-auth",
-  "version": "3.0.0",
-  "description": "middleware authentication flows for commercetools platform API, and use with @commercetools/sdk-client",
-  "keywords": ["commercetools", "middleware", "sdk", "oauth", "auth"],
-  "author": "Chukwuemeka Ajima <meeky.ae@gmail.com>",
-  "homepage": "https://github.com/commercetools/commercetools-sdk-typescript",
-  "license": "MIT",
-  "main": "dist/index.js",
-  "directories": {
-    "src": "src",
-    "test": "test"
-  },
-  "files": ["lib"],
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/commercetools/commercetools-sdk-typescript.git"
-  },
-  "bugs": {
-    "url": "https://github.com/commercetools/commercetools-sdk-typescript/issues"
-  },
-  "dependencies": {
-    "node-fetch": "^2.3.0"
-  },
-  "devDependencies": {
-    "@types/jest": "^26.0.23",
-    "@types/node": "^15.9.0",
-    "common-tags": "^1.8.0",
-    "jest": "^27.0.3",
-    "jest-junit": "^12.1.0",
-    "nock": "12.0.3",
-    "rimraf": "^3.0.2",
-    "ts-jest": "^27.0.2",
-    "typescript": "^4.3.2"
-  },
-  "scripts": {
-    "prebuild": "rimraf dist/**",
-    "build": "rimraf dist && tsc",
-    "test": "jest"
-  }
-}
diff --git a/packages/sdk-middleware-auth/tsconfig.json b/packages/sdk-middleware-auth/tsconfig.json
deleted file mode 100644
index 30ee37eef..000000000
--- a/packages/sdk-middleware-auth/tsconfig.json
+++ /dev/null
@@ -1,67 +0,0 @@
-{
-  "compilerOptions": {
-    /* Visit https://aka.ms/tsconfig.json to read more about this file */
-    /* Basic Options */
-    // "incremental": true,                         /* Enable incremental compilation */
-    "target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', 'ES2021', or 'ESNEXT'. */,
-    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
-    // "lib": [],                                   /* Specify library files to be included in the compilation. */
-    "allowJs": true /* Allow javascript files to be compiled. */,
-    // "checkJs": true,                             /* Report errors in .js files. */
-    // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
-    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
-    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
-    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
-    // "outFile": "./",                             /* Concatenate and emit output to single file. */
-    "outDir": "dist" /* Redirect output structure to the directory. */,
-    "rootDir": "src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
-    // "composite": true,                           /* Enable project compilation */
-    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
-    "removeComments": false /* Do not emit comments to output. */,
-    // "noEmit": true,                              /* Do not emit outputs. */
-    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
-    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-    /* Strict Type-Checking Options */
-    "strict": true /* Enable all strict type-checking options. */,
-    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
-    // "strictNullChecks": true,                    /* Enable strict null checks. */
-    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
-    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
-    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
-    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
-    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
-    /* Additional Checks */
-    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
-    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
-    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
-    // "noImplicitOverride": true,                  /* Ensure overriding members in derived classes are marked with an 'override' modifier. */
-    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
-    /* Module Resolution Options */
-    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
-    "baseUrl": "." /* Base directory to resolve non-absolute module names. */,
-    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
-    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                             /* List of folders to include type definitions from. */
-    // "types": [],                                 /* Type declaration files to be included in compilation. */
-    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
-    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
-    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
-    /* Source Map Options */
-    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
-    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
-    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-    /* Experimental Options */
-    // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
-    // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */
-    /* Advanced Options */
-    "skipLibCheck": true /* Skip type checking of declaration files. */,
-    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
-  },
-  "include": ["./src/**/*"],
-  "exclude": ["./test/*.test.ts"]
-}
diff --git a/packages/sdk-middleware-http/README.md b/packages/sdk-middleware-http/README.md
deleted file mode 100644
index 372fbc610..000000000
--- a/packages/sdk-middleware-http/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# `sdk-middleware-http`
-
-> TODO: description
-
-## Usage
-
-```
-const sdkMiddlewareHttp = require('sdk-middleware-http');
-
-// TODO: DEMONSTRATE API
-```
diff --git a/packages/sdk-middleware-http/jest.config.js b/packages/sdk-middleware-http/jest.config.js
deleted file mode 100644
index db70b5005..000000000
--- a/packages/sdk-middleware-http/jest.config.js
+++ /dev/null
@@ -1,23 +0,0 @@
-module.exports = {
-  preset: 'ts-jest',
-  testEnvironment: 'node',
-  collectCoverage: true,
-  coverageDirectory: 'coverage',
-  testPathIgnorePatterns: [
-    "/node_modules/"
-  ],
-  verbose: true,
-  coverageThreshold: {
-    global: {
-      // branches: 85,
-      // lines: 85,
-      // functions: 85,
-      statements: 90
-    }
-  },
-  globals: {
-    'ts-jest': {
-      diagnostics: false,
-    }
-  }
-}
diff --git a/packages/sdk-middleware-http/package.json b/packages/sdk-middleware-http/package.json
deleted file mode 100644
index cc34416d8..000000000
--- a/packages/sdk-middleware-http/package.json
+++ /dev/null
@@ -1,49 +0,0 @@
-{
-  "name": "@commercetools/sdk-middleware-http",
-  "version": "3.0.0",
-  "description": "middleware for http requests, to use with @commercetools/sdk-client",
-  "keywords": [
-    "commercetools",
-    "sdk",
-    "middleware",
-    "http"
-  ],
-  "author": "Chukwuemeka Ajima <meeky.ae@gmail.com>",
-  "homepage": "https://github.com/commercetools/commercetools-sdk-typescript",
-  "license": "MIT",
-  "main": "dist/index.js",
-  "directories": {
-    "lib": "lib",
-    "test": "__tests__"
-  },
-  "files": [
-    "lib"
-  ],
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/commercetools/commercetools-sdk-typescript.git"
-  },
-  "bugs": {
-    "url": "https://github.com/commercetools/commercetools-sdk-typescript/issues"
-  },
-  "dependencies": {
-    "node-fetch": "^2.6.1"
-  },
-  "devDependencies": {
-    "@types/jest": "^26.0.23",
-    "@types/node": "^15.9.0",
-    "abort-controller": "3.0.0",
-    "common-tags": "^1.8.0",
-    "jest": "^27.0.3",
-    "jest-junit": "^12.1.0",
-    "nock": "12.0.3",
-    "rimraf": "^3.0.2",
-    "ts-jest": "^27.0.2",
-    "typescript": "^4.3.2"
-  },
-  "scripts": {
-    "prebuild": "rimraf dist/**",
-    "build": "rimraf dist && tsc",
-    "test": "jest"
-  }
-}
diff --git a/packages/sdk-middleware-http/src/index.ts b/packages/sdk-middleware-http/src/index.ts
deleted file mode 100644
index f97bb838c..000000000
--- a/packages/sdk-middleware-http/src/index.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export { default as createHttpMiddleware } from './http'
-export { default as getErrorByCode } from './errors'
-export * as errors from './errors'
diff --git a/packages/sdk-middleware-http/tsconfig.json b/packages/sdk-middleware-http/tsconfig.json
deleted file mode 100644
index 4efe8f489..000000000
--- a/packages/sdk-middleware-http/tsconfig.json
+++ /dev/null
@@ -1,67 +0,0 @@
-{
-  "compilerOptions": {
-    /* Visit https://aka.ms/tsconfig.json to read more about this file */
-    /* Basic Options */
-    // "incremental": true,                         /* Enable incremental compilation */
-    "target": "es5"                                 /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', 'ES2021', or 'ESNEXT'. */,
-    "module": "commonjs"                            /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
-    // "lib": [],                                   /* Specify library files to be included in the compilation. */
-    "allowJs": true                                 /* Allow javascript files to be compiled. */,
-    // "checkJs": true,                             /* Report errors in .js files. */
-    // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
-    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
-    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
-    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
-    // "outFile": "./",                             /* Concatenate and emit output to single file. */
-    "outDir": "dist"                                /* Redirect output structure to the directory. */,
-    "rootDir": "src"                                /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
-    // "composite": true,                           /* Enable project compilation */
-    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
-    "removeComments": false                         /* Do not emit comments to output. */,
-    // "noEmit": true,                              /* Do not emit outputs. */
-    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
-    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-    /* Strict Type-Checking Options */
-    "strict": true                                  /* Enable all strict type-checking options. */,
-    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
-    // "strictNullChecks": true,                    /* Enable strict null checks. */
-    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
-    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
-    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
-    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
-    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
-    /* Additional Checks */
-    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
-    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
-    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
-    // "noImplicitOverride": true,                  /* Ensure overriding members in derived classes are marked with an 'override' modifier. */
-    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
-    /* Module Resolution Options */
-    "moduleResolution": "node"                      /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
-    "baseUrl": "."                                  /* Base directory to resolve non-absolute module names. */,
-    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
-    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                             /* List of folders to include type definitions from. */
-    // "types": [],                                 /* Type declaration files to be included in compilation. */
-    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true                         /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
-    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
-    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
-    /* Source Map Options */
-    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
-    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
-    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-    /* Experimental Options */
-    // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
-    // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */
-    /* Advanced Options */
-    "skipLibCheck": true                            /* Skip type checking of declaration files. */,
-    "forceConsistentCasingInFileNames": true        /* Disallow inconsistently-cased references to the same file. */
-  },
-  "include": ["./src/**/*"],
-  "exclude": ["./test/*.test.ts"]
-}