diff --git a/src/jsTyping/jsTyping.ts b/src/jsTyping/jsTyping.ts
index 1278b8bff5b36..e647298f6762e 100644
--- a/src/jsTyping/jsTyping.ts
+++ b/src/jsTyping/jsTyping.ts
@@ -31,7 +31,6 @@ import {
     versionMajorMinor,
 } from "./_namespaces/ts";
 
-/** @internal */
 export interface TypingResolutionHost {
     directoryExists(path: string): boolean;
     fileExists(fileName: string): boolean;
diff --git a/src/jsTyping/types.ts b/src/jsTyping/types.ts
index f9db607a09f37..bf10bfa45105d 100644
--- a/src/jsTyping/types.ts
+++ b/src/jsTyping/types.ts
@@ -99,7 +99,6 @@ export interface EndInstallTypes extends InstallTypes {
     readonly installSuccess: boolean;
 }
 
-/** @internal */
 export interface InstallTypingHost extends JsTyping.TypingResolutionHost {
     useCaseSensitiveFileNames: boolean;
     writeFile(path: string, content: string): void;
diff --git a/src/server/_namespaces/ts.server.ts b/src/server/_namespaces/ts.server.ts
index 91d9a909ae7f8..62b2d8a3b563d 100644
--- a/src/server/_namespaces/ts.server.ts
+++ b/src/server/_namespaces/ts.server.ts
@@ -1,6 +1,7 @@
 /* Generated file to emulate the ts.server namespace. */
 
 export * from "../../jsTyping/_namespaces/ts.server";
+export * from "../../typingsInstallerCore/_namespaces/ts.server";
 export * from "../types";
 export * from "../utilitiesPublic";
 export * from "../utilities";
diff --git a/src/server/tsconfig.json b/src/server/tsconfig.json
index e7efc71154e55..22a1de22f93b9 100644
--- a/src/server/tsconfig.json
+++ b/src/server/tsconfig.json
@@ -8,6 +8,7 @@
     "references": [
         { "path": "../compiler" },
         { "path": "../jsTyping" },
+        { "path": "../typingsInstallerCore" },
         { "path": "../services" },
         { "path": "../deprecatedCompat" }
     ],
diff --git a/src/typingsInstallerCore/typingsInstaller.ts b/src/typingsInstallerCore/typingsInstaller.ts
index b57d585e2f9a9..bf2c4c90a9b35 100644
--- a/src/typingsInstallerCore/typingsInstaller.ts
+++ b/src/typingsInstallerCore/typingsInstaller.ts
@@ -107,7 +107,8 @@ export function getNpmCommandForInstallation(npmPath: string, tsVersion: string,
 }
 
 export type RequestCompletedAction = (success: boolean) => void;
-interface PendingRequest {
+
+export interface PendingRequest {
     requestId: number;
     packageNames: string[];
     cwd: string;
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 8507f14d8afd5..4f9785d123f55 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -79,6 +79,14 @@ declare namespace ts {
             readonly kind: EventEndInstallTypes;
             readonly installSuccess: boolean;
         }
+        interface InstallTypingHost extends JsTyping.TypingResolutionHost {
+            useCaseSensitiveFileNames: boolean;
+            writeFile(path: string, content: string): void;
+            createDirectory(path: string): void;
+            getCurrentDirectory?(): string;
+            watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number, options?: WatchOptions): FileWatcher;
+            watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean, options?: WatchOptions): FileWatcher;
+        }
         interface SetTypings extends ProjectResponse {
             readonly typeAcquisition: TypeAcquisition;
             readonly compilerOptions: CompilerOptions;
@@ -2965,6 +2973,55 @@ declare namespace ts {
                 bigintLiteral = 25
             }
         }
+        namespace typingsInstaller {
+            interface Log {
+                isEnabled(): boolean;
+                writeLine(text: string): void;
+            }
+            type RequestCompletedAction = (success: boolean) => void;
+            interface PendingRequest {
+                requestId: number;
+                packageNames: string[];
+                cwd: string;
+                onRequestCompleted: RequestCompletedAction;
+            }
+            abstract class TypingsInstaller {
+                protected readonly installTypingHost: InstallTypingHost;
+                private readonly globalCachePath;
+                private readonly safeListPath;
+                private readonly typesMapLocation;
+                private readonly throttleLimit;
+                protected readonly log: Log;
+                private readonly packageNameToTypingLocation;
+                private readonly missingTypingsSet;
+                private readonly knownCachesSet;
+                private readonly projectWatchers;
+                private safeList;
+                readonly pendingRunRequests: PendingRequest[];
+                private readonly toCanonicalFileName;
+                private readonly globalCachePackageJsonPath;
+                private installRunCount;
+                private inFlightRequestCount;
+                abstract readonly typesRegistry: Map<string, MapLike<string>>;
+                constructor(installTypingHost: InstallTypingHost, globalCachePath: string, safeListPath: Path, typesMapLocation: Path, throttleLimit: number, log?: Log);
+                closeProject(req: CloseProject): void;
+                private closeWatchers;
+                install(req: DiscoverTypings): void;
+                private initializeSafeList;
+                private processCacheLocation;
+                private filterTypings;
+                protected ensurePackageDirectoryExists(directory: string): void;
+                private installTypings;
+                private ensureDirectoryExists;
+                private watchFiles;
+                private createSetTypings;
+                private installTypingsAsync;
+                private executeWithThrottling;
+                protected abstract installWorker(requestId: number, packageNames: string[], cwd: string, onRequestCompleted: RequestCompletedAction): void;
+                protected abstract sendResponse(response: SetTypings | InvalidateCachedTypings | BeginInstallTypes | EndInstallTypes): void;
+                protected readonly latestDistTag = "latest";
+            }
+        }
         interface CompressedData {
             length: number;
             compressionKind: string;
@@ -9789,6 +9846,14 @@ declare namespace ts {
         emit(writeFile?: WriteFileCallback, customTransformers?: CustomTransformers): EmitResult | BuildInvalidedProject<T> | undefined;
     }
     type InvalidatedProject<T extends BuilderProgram> = UpdateOutputFileStampsProject | BuildInvalidedProject<T> | UpdateBundleProject<T>;
+    namespace JsTyping {
+        interface TypingResolutionHost {
+            directoryExists(path: string): boolean;
+            fileExists(fileName: string): boolean;
+            readFile(path: string, encoding?: string): string | undefined;
+            readDirectory(rootDir: string, extensions: readonly string[], excludes: readonly string[] | undefined, includes: readonly string[] | undefined, depth?: number): string[];
+        }
+    }
     function getDefaultFormatCodeSettings(newLineCharacter?: string): FormatCodeSettings;
     /**
      * Represents an immutable snapshot of a script at a specified time.Once acquired, the
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index a7ad7f9448614..2f46e1ddf2456 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -5846,6 +5846,14 @@ declare namespace ts {
         emit(writeFile?: WriteFileCallback, customTransformers?: CustomTransformers): EmitResult | BuildInvalidedProject<T> | undefined;
     }
     type InvalidatedProject<T extends BuilderProgram> = UpdateOutputFileStampsProject | BuildInvalidedProject<T> | UpdateBundleProject<T>;
+    namespace JsTyping {
+        interface TypingResolutionHost {
+            directoryExists(path: string): boolean;
+            fileExists(fileName: string): boolean;
+            readFile(path: string, encoding?: string): string | undefined;
+            readDirectory(rootDir: string, extensions: readonly string[], excludes: readonly string[] | undefined, includes: readonly string[] | undefined, depth?: number): string[];
+        }
+    }
     namespace server {
         type ActionSet = "action::set";
         type ActionInvalidate = "action::invalidate";
@@ -5911,6 +5919,14 @@ declare namespace ts {
             readonly kind: EventEndInstallTypes;
             readonly installSuccess: boolean;
         }
+        interface InstallTypingHost extends JsTyping.TypingResolutionHost {
+            useCaseSensitiveFileNames: boolean;
+            writeFile(path: string, content: string): void;
+            createDirectory(path: string): void;
+            getCurrentDirectory?(): string;
+            watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number, options?: WatchOptions): FileWatcher;
+            watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean, options?: WatchOptions): FileWatcher;
+        }
         interface SetTypings extends ProjectResponse {
             readonly typeAcquisition: TypeAcquisition;
             readonly compilerOptions: CompilerOptions;