diff --git a/packages/server/package.json b/packages/server/package.json
index 3db74cc38..053acf7a7 100644
--- a/packages/server/package.json
+++ b/packages/server/package.json
@@ -22,7 +22,8 @@
         "nextjs",
         "sveltekit",
         "nuxtjs",
-        "elysia"
+        "elysia",
+        "tanstack-start"
     ],
     "author": "ZenStack Team",
     "license": "MIT",
@@ -74,6 +75,7 @@
         "./nestjs": "./nestjs/index.js",
         "./hono": "./hono/index.js",
         "./elysia": "./elysia/index.js",
+        "./tanstack-start": "./tanstack-start/index.js",
         "./types": "./types.js"
     }
 }
diff --git a/packages/server/src/tanstack-start/handler.ts b/packages/server/src/tanstack-start/handler.ts
new file mode 100644
index 000000000..63a98e10b
--- /dev/null
+++ b/packages/server/src/tanstack-start/handler.ts
@@ -0,0 +1,83 @@
+/* eslint-disable @typescript-eslint/no-non-null-assertion */
+
+import { DbClientContract } from '@zenstackhq/runtime';
+import { TanStackStartOptions } from '.';
+import { RPCApiHandler } from '../api';
+import { loadAssets } from '../shared';
+
+/**
+ * Creates a TanStack Start server route handler which encapsulates Prisma CRUD operations.
+ *
+ * @param options Options for initialization
+ * @returns A TanStack Start server route handler
+ */
+export default function factory(
+    options: TanStackStartOptions
+): ({ request, params }: { request: Request; params: Record<string, string> }) => Promise<Response> {
+    const { modelMeta, zodSchemas } = loadAssets(options);
+
+    const requestHandler = options.handler || RPCApiHandler();
+
+    return async ({ request, params }: { request: Request; params: Record<string, string> }) => {
+        const prisma = (await options.getPrisma(request, params)) as DbClientContract;
+        if (!prisma) {
+            return new Response(JSON.stringify({ message: 'unable to get prisma from request context' }), {
+                status: 500,
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+            });
+        }
+
+        const url = new URL(request.url);
+        const query = Object.fromEntries(url.searchParams);
+
+        // Extract path from params._splat for catch-all routes
+        const path = params._splat;
+
+        if (!path) {
+            return new Response(JSON.stringify({ message: 'missing path parameter' }), {
+                status: 400,
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+            });
+        }
+
+        let requestBody: unknown;
+        if (request.body) {
+            try {
+                requestBody = await request.json();
+            } catch {
+                // noop
+            }
+        }
+
+        try {
+            const r = await requestHandler({
+                method: request.method!,
+                path,
+                query,
+                requestBody,
+                prisma,
+                modelMeta,
+                zodSchemas,
+                logger: options.logger,
+            });
+            return new Response(JSON.stringify(r.body), {
+                status: r.status,
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+            });
+        } catch (err) {
+            return new Response(JSON.stringify({ message: `An unhandled error occurred: ${err}` }), {
+                status: 500,
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+            });
+        }
+    };
+}
+
diff --git a/packages/server/src/tanstack-start/index.ts b/packages/server/src/tanstack-start/index.ts
new file mode 100644
index 000000000..ecb62543f
--- /dev/null
+++ b/packages/server/src/tanstack-start/index.ts
@@ -0,0 +1,23 @@
+import type { AdapterBaseOptions } from '../types';
+import { default as Handler } from './handler';
+
+/**
+ * Options for initializing a TanStack Start server route handler.
+ */
+export interface TanStackStartOptions extends AdapterBaseOptions {
+    /**
+     * Callback method for getting a Prisma instance for the given request and params.
+     */
+    getPrisma: (request: Request, params: Record<string, string>) => Promise<unknown> | unknown;
+}
+
+/**
+ * Creates a TanStack Start server route handler.
+ * @see https://zenstack.dev/docs/reference/server-adapters/tanstack-start
+ */
+export function TanStackStartHandler(options: TanStackStartOptions): ReturnType<typeof Handler> {
+    return Handler(options);
+}
+
+export default TanStackStartHandler;
+
diff --git a/packages/server/tests/adapter/tanstack-start.test.ts b/packages/server/tests/adapter/tanstack-start.test.ts
new file mode 100644
index 000000000..db34c1ca7
--- /dev/null
+++ b/packages/server/tests/adapter/tanstack-start.test.ts
@@ -0,0 +1,269 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { loadSchema } from '@zenstackhq/testtools';
+import path from 'path';
+import Rest from '../../src/api/rest';
+import { TanStackStartHandler, TanStackStartOptions } from '../../src/tanstack-start';
+
+function makeRequest(method: string, url: string, body?: any): Request {
+    const payload = body ? JSON.stringify(body) : undefined;
+    return new Request(url, { method, body: payload });
+}
+
+async function unmarshal(response: Response): Promise<any> {
+    const text = await response.text();
+    return JSON.parse(text);
+}
+
+interface TestClient {
+    get: () => Promise<{ status: number; body: any }>;
+    post: () => { send: (data: any) => Promise<{ status: number; body: any }> };
+    put: () => { send: (data: any) => Promise<{ status: number; body: any }> };
+    del: () => Promise<{ status: number; body: any }>;
+}
+
+function makeTestClient(apiPath: string, options: TanStackStartOptions, qArg?: unknown, otherArgs?: any): TestClient {
+    const pathParts = apiPath.split('/').filter((p) => p);
+    const path = pathParts.join('/');
+
+    const handler = TanStackStartHandler(options);
+
+    const params = {
+        _splat: path,
+        ...otherArgs,
+    };
+
+    const buildUrl = (method: string) => {
+        const baseUrl = `http://localhost${apiPath}`;
+        if (method === 'GET' || method === 'DELETE') {
+            const url = new URL(baseUrl);
+            if (qArg) {
+                url.searchParams.set('q', JSON.stringify(qArg));
+            }
+            if (otherArgs) {
+                Object.entries(otherArgs).forEach(([key, value]) => {
+                    url.searchParams.set(key, String(value));
+                });
+            }
+            return url.toString();
+        }
+        return baseUrl;
+    };
+
+    const executeRequest = async (method: string, body?: any) => {
+        const url = buildUrl(method);
+        const request = makeRequest(method, url, body);
+        const response = await handler({ request, params });
+        const responseBody = await unmarshal(response);
+        return {
+            status: response.status,
+            body: responseBody,
+        };
+    };
+
+    return {
+        get: async () => executeRequest('GET'),
+        post: () => ({
+            send: async (data: any) => executeRequest('POST', data),
+        }),
+        put: () => ({
+            send: async (data: any) => executeRequest('PUT', data),
+        }),
+        del: async () => executeRequest('DELETE'),
+    };
+}
+
+describe('TanStack Start adapter tests - rpc handler', () => {
+    let origDir: string;
+
+    beforeEach(() => {
+        origDir = process.cwd();
+    });
+
+    afterEach(() => {
+        process.chdir(origDir);
+    });
+
+    it('simple crud', async () => {
+        const model = `
+model M {
+    id String @id @default(cuid())
+    value Int
+}
+        `;
+
+        const { prisma } = await loadSchema(model);
+
+        const client = await makeTestClient('/m/create', { getPrisma: () => prisma }).post().send({ data: { id: '1', value: 1 } });
+        expect(client.status).toBe(201);
+        expect(client.body.data.value).toBe(1);
+
+        const findUnique = await makeTestClient('/m/findUnique', { getPrisma: () => prisma }, { where: { id: '1' } }).get();
+        expect(findUnique.status).toBe(200);
+        expect(findUnique.body.data.value).toBe(1);
+
+        const findFirst = await makeTestClient('/m/findFirst', { getPrisma: () => prisma }, { where: { id: '1' } }).get();
+        expect(findFirst.status).toBe(200);
+        expect(findFirst.body.data.value).toBe(1);
+
+        const findMany = await makeTestClient('/m/findMany', { getPrisma: () => prisma }, {}).get();
+        expect(findMany.status).toBe(200);
+        expect(findMany.body.data).toHaveLength(1);
+
+        const update = await makeTestClient('/m/update', { getPrisma: () => prisma }).put().send({ where: { id: '1' }, data: { value: 2 } });
+        expect(update.status).toBe(200);
+        expect(update.body.data.value).toBe(2);
+
+        const updateMany = await makeTestClient('/m/updateMany', { getPrisma: () => prisma }).put().send({ data: { value: 4 } });
+        expect(updateMany.status).toBe(200);
+        expect(updateMany.body.data.count).toBe(1);
+
+        const upsert1 = await makeTestClient('/m/upsert', { getPrisma: () => prisma }).post().send({ where: { id: '2' }, create: { id: '2', value: 2 }, update: { value: 3 } });
+        expect(upsert1.status).toBe(201);
+        expect(upsert1.body.data.value).toBe(2);
+
+        const upsert2 = await makeTestClient('/m/upsert', { getPrisma: () => prisma }).post().send({ where: { id: '2' }, create: { id: '2', value: 2 }, update: { value: 3 } });
+        expect(upsert2.status).toBe(201);
+        expect(upsert2.body.data.value).toBe(3);
+
+        const count1 = await makeTestClient('/m/count', { getPrisma: () => prisma }, { where: { id: '1' } }).get();
+        expect(count1.status).toBe(200);
+        expect(count1.body.data).toBe(1);
+
+        const count2 = await makeTestClient('/m/count', { getPrisma: () => prisma }, {}).get();
+        expect(count2.status).toBe(200);
+        expect(count2.body.data).toBe(2);
+
+        const aggregate = await makeTestClient('/m/aggregate', { getPrisma: () => prisma }, { _sum: { value: true } }).get();
+        expect(aggregate.status).toBe(200);
+        expect(aggregate.body.data._sum.value).toBe(7);
+
+        const groupBy = await makeTestClient('/m/groupBy', { getPrisma: () => prisma }, { by: ['id'], _sum: { value: true } }).get();
+        expect(groupBy.status).toBe(200);
+        const data = groupBy.body.data;
+        expect(data).toHaveLength(2);
+        expect(data.find((item: any) => item.id === '1')._sum.value).toBe(4);
+        expect(data.find((item: any) => item.id === '2')._sum.value).toBe(3);
+
+        const deleteOne = await makeTestClient('/m/delete', { getPrisma: () => prisma }, { where: { id: '1' } }).del();
+        expect(deleteOne.status).toBe(200);
+        expect(await prisma.m.count()).toBe(1);
+
+        const deleteMany = await makeTestClient('/m/deleteMany', { getPrisma: () => prisma }, {}).del();
+        expect(deleteMany.status).toBe(200);
+        expect(deleteMany.body.data.count).toBe(1);
+        expect(await prisma.m.count()).toBe(0);
+    });
+
+    it('custom load path', async () => {
+        const model = `
+model M {
+    id String @id @default(cuid())
+    value Int
+}
+        `;
+
+        const { prisma, projectDir } = await loadSchema(model, { output: './zen' });
+
+        const client = await makeTestClient('/m/create', {
+            getPrisma: () => prisma,
+            modelMeta: require(path.join(projectDir, './zen/model-meta')).default,
+            zodSchemas: require(path.join(projectDir, './zen/zod')),
+        }).post().send({ data: { id: '1', value: 1 } });
+        
+        expect(client.status).toBe(201);
+        expect(client.body.data.value).toBe(1);
+    });
+
+    it('access policy crud', async () => {
+        const model = `
+model M {
+    id String @id @default(cuid())
+    value Int
+
+    @@allow('create', true)
+    @@allow('read', value > 0)
+    @@allow('update', future().value > 1)
+    @@allow('delete', value > 2)
+}
+        `;
+
+        const { enhance } = await loadSchema(model);
+
+        const createForbidden = await makeTestClient('/m/create', { getPrisma: () => enhance() }).post().send({ data: { value: 0 } });
+        expect(createForbidden.status).toBe(403);
+        expect(createForbidden.body.error.reason).toBe('RESULT_NOT_READABLE');
+
+        const create = await makeTestClient('/m/create', { getPrisma: () => enhance() }).post().send({ data: { id: '1', value: 1 } });
+        expect(create.status).toBe(201);
+
+        const findMany = await makeTestClient('/m/findMany', { getPrisma: () => enhance() }).get();
+        expect(findMany.status).toBe(200);
+        expect(findMany.body.data).toHaveLength(1);
+
+        const updateForbidden1 = await makeTestClient('/m/update', { getPrisma: () => enhance() }).put().send({ where: { id: '1' }, data: { value: 0 } });
+        expect(updateForbidden1.status).toBe(403);
+
+        const update1 = await makeTestClient('/m/update', { getPrisma: () => enhance() }).put().send({ where: { id: '1' }, data: { value: 2 } });
+        expect(update1.status).toBe(200);
+
+        const deleteForbidden = await makeTestClient('/m/delete', { getPrisma: () => enhance() }, { where: { id: '1' } }).del();
+        expect(deleteForbidden.status).toBe(403);
+
+        const update2 = await makeTestClient('/m/update', { getPrisma: () => enhance() }).put().send({ where: { id: '1' }, data: { value: 3 } });
+        expect(update2.status).toBe(200);
+
+        const deleteOne = await makeTestClient('/m/delete', { getPrisma: () => enhance() }, { where: { id: '1' } }).del();
+        expect(deleteOne.status).toBe(200);
+    });
+});
+
+describe('TanStack Start adapter tests - rest handler', () => {
+    let origDir: string;
+
+    beforeEach(() => {
+        origDir = process.cwd();
+    });
+
+    afterEach(() => {
+        process.chdir(origDir);
+    });
+
+    it('adapter test - rest', async () => {
+        const model = `
+model M {
+    id String @id @default(cuid())
+    value Int
+}
+        `;
+
+        const { prisma, modelMeta } = await loadSchema(model);
+
+        const options = { getPrisma: () => prisma, handler: Rest({ endpoint: 'http://localhost/api' }), modelMeta };
+
+        const create = await makeTestClient('/m', options).post().send({ data: { type: 'm', attributes: { id: '1', value: 1 } } });
+        expect(create.status).toBe(201);
+        expect(create.body.data.attributes.value).toBe(1);
+
+        const getOne = await makeTestClient('/m/1', options).get();
+        expect(getOne.status).toBe(200);
+        expect(getOne.body.data.id).toBe('1');
+
+        const findWithFilter1 = await makeTestClient('/m', options, undefined, { 'filter[value]': '1' }).get();
+        expect(findWithFilter1.status).toBe(200);
+        expect(findWithFilter1.body.data).toHaveLength(1);
+
+        const findWithFilter2 = await makeTestClient('/m', options, undefined, { 'filter[value]': '2' }).get();
+        expect(findWithFilter2.status).toBe(200);
+        expect(findWithFilter2.body.data).toHaveLength(0);
+
+        const update = await makeTestClient('/m/1', options).put().send({ data: { type: 'm', attributes: { value: 2 } } });
+        expect(update.status).toBe(200);
+        expect(update.body.data.attributes.value).toBe(2);
+
+        const deleteOne = await makeTestClient('/m/1', options).del();
+        expect(deleteOne.status).toBe(200);
+        expect(await prisma.m.count()).toBe(0);
+    });
+});
+