diff --git a/README.md b/README.md
index 5fb20d75..8a312148 100644
--- a/README.md
+++ b/README.md
@@ -140,7 +140,9 @@ export const appRouter = trpc.router<Context, OpenApiMeta>().query('sayHello', {
 });
 
 // Client
-const res = await fetch('http://localhost:3000/say-hello/James?greeting=Hello' /* 👈 */, { method: 'GET' });
+const res = await fetch('http://localhost:3000/say-hello/James?greeting=Hello' /* 👈 */, {
+  method: 'GET',
+});
 const body = await res.json(); /* { ok: true, data: { greeting: 'Hello James!' } } */
 ```
 
@@ -243,7 +245,7 @@ export const appRouter = trpc.router<Context, OpenApiMeta>().query('sayHello', {
 ```typescript
 const res = await fetch('http://localhost:3000/say-hello', {
   method: 'GET',
-  headers: { 'Authorization': 'Bearer usr_123' }, /* 👈 */
+  headers: { Authorization: 'Bearer usr_123' } /* 👈 */,
 });
 const body = await res.json(); /* { ok: true, data: { greeting: 'Hello James!' } } */
 ```
@@ -311,7 +313,8 @@ Please see [full typings here](src/types.ts).
 | `protect`     | `boolean`    | Requires this endpoint to use an `Authorization` header credential with `Bearer` scheme on OpenAPI document.       | `false`  | `false`     |
 | `summary`     | `string`     | A short summary of the endpoint included in the OpenAPI document.                                                  | `false`  | `undefined` |
 | `description` | `string`     | A verbose description of the endpoint included in the OpenAPI document.                                            | `false`  | `undefined` |
-| `tag`         | `string`     | A tag used for logical grouping of endpoints in the OpenAPI document.                                              | `false`  | `undefined` |
+| `tag`         | `string`     | A single tag used for logical grouping of endpoints in the OpenAPI document.                                       | `false`  | `undefined` |
+| `tags`        | `string[]`   | A list of tags used for logical grouping of endpoints in the OpenAPI document.                                     | `false`  | `undefined` |
 
 #### CreateOpenApiNodeHttpHandlerOptions
 
diff --git a/examples/with-express/src/router.ts b/examples/with-express/src/router.ts
index 8255e0f0..cfe72d67 100644
--- a/examples/with-express/src/router.ts
+++ b/examples/with-express/src/router.ts
@@ -63,7 +63,7 @@ const authRouter = createRouter()
         enabled: true,
         method: 'POST',
         path: '/auth/register',
-        tag: 'auth',
+        tags: ['auth'],
         summary: 'Register as a new user',
       },
     },
@@ -107,7 +107,7 @@ const authRouter = createRouter()
         enabled: true,
         method: 'POST',
         path: '/auth/login',
-        tag: 'auth',
+        tags: ['auth'],
         summary: 'Login as an existing user',
       },
     },
@@ -147,7 +147,7 @@ const usersRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/users',
-        tag: 'users',
+        tags: ['users'],
         summary: 'Read all users',
       },
     },
@@ -177,7 +177,7 @@ const usersRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/users/{id}',
-        tag: 'users',
+        tags: ['users'],
         summary: 'Read a user by id',
       },
     },
@@ -212,7 +212,7 @@ const postsRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/posts',
-        tag: 'posts',
+        tags: ['posts'],
         summary: 'Read all posts',
       },
     },
@@ -246,7 +246,7 @@ const postsRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/posts/{id}',
-        tag: 'posts',
+        tags: ['posts'],
         summary: 'Read a post by id',
       },
     },
@@ -281,7 +281,7 @@ const postsProtectedRouter = createProtectedRouter()
         enabled: true,
         method: 'POST',
         path: '/posts',
-        tag: 'posts',
+        tags: ['posts'],
         protect: true,
         summary: 'Create a new post',
       },
@@ -314,7 +314,7 @@ const postsProtectedRouter = createProtectedRouter()
         enabled: true,
         method: 'PUT',
         path: '/posts/{id}',
-        tag: 'posts',
+        tags: ['posts'],
         protect: true,
         summary: 'Update an existing post',
       },
@@ -357,7 +357,7 @@ const postsProtectedRouter = createProtectedRouter()
         enabled: true,
         method: 'DELETE',
         path: '/posts/{id}',
-        tag: 'posts',
+        tags: ['posts'],
         protect: true,
         summary: 'Delete a post',
       },
diff --git a/examples/with-nextjs/src/server/router.ts b/examples/with-nextjs/src/server/router.ts
index 7006a58e..364e2426 100644
--- a/examples/with-nextjs/src/server/router.ts
+++ b/examples/with-nextjs/src/server/router.ts
@@ -60,7 +60,7 @@ const authRouter = createRouter()
         enabled: true,
         method: 'POST',
         path: '/auth/register',
-        tag: 'auth',
+        tags: ['auth'],
         summary: 'Register as a new user',
       },
     },
@@ -104,7 +104,7 @@ const authRouter = createRouter()
         enabled: true,
         method: 'POST',
         path: '/auth/login',
-        tag: 'auth',
+        tags: ['auth'],
         summary: 'Login as an existing user',
       },
     },
@@ -144,7 +144,7 @@ const usersRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/users',
-        tag: 'users',
+        tags: ['users'],
         summary: 'Read all users',
       },
     },
@@ -174,7 +174,7 @@ const usersRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/users/{id}',
-        tag: 'users',
+        tags: ['users'],
         summary: 'Read a user by id',
       },
     },
@@ -209,7 +209,7 @@ const postsRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/posts',
-        tag: 'posts',
+        tags: ['posts'],
         summary: 'Read all posts',
       },
     },
@@ -243,7 +243,7 @@ const postsRouter = createRouter()
         enabled: true,
         method: 'GET',
         path: '/posts/{id}',
-        tag: 'posts',
+        tags: ['posts'],
         summary: 'Read a post by id',
       },
     },
@@ -278,7 +278,7 @@ const postsProtectedRouter = createProtectedRouter()
         enabled: true,
         method: 'POST',
         path: '/posts',
-        tag: 'posts',
+        tags: ['posts'],
         protect: true,
         summary: 'Create a new post',
       },
@@ -311,7 +311,7 @@ const postsProtectedRouter = createProtectedRouter()
         enabled: true,
         method: 'PUT',
         path: '/posts/{id}',
-        tag: 'posts',
+        tags: ['posts'],
         protect: true,
         summary: 'Update an existing post',
       },
@@ -354,7 +354,7 @@ const postsProtectedRouter = createProtectedRouter()
         enabled: true,
         method: 'DELETE',
         path: '/posts/{id}',
-        tag: 'posts',
+        tags: ['posts'],
         protect: true,
         summary: 'Delete a post',
       },
diff --git a/src/generator/paths.ts b/src/generator/paths.ts
index c1c7bd38..52dce093 100644
--- a/src/generator/paths.ts
+++ b/src/generator/paths.ts
@@ -14,7 +14,7 @@ export const getOpenApiPathsObject = (
 
   forEachOpenApiProcedure(queries, ({ path: queryPath, procedure, openapi }) => {
     try {
-      const { method, protect, summary, description, tag } = openapi;
+      const { method, protect, summary, description, tags, tag } = openapi;
       if (method !== 'GET' && method !== 'DELETE') {
         throw new TRPCError({
           message: 'Query method must be GET or DELETE',
@@ -40,7 +40,7 @@ export const getOpenApiPathsObject = (
           operationId: queryPath,
           summary,
           description,
-          tags: tag ? [tag] : undefined,
+          tags: tags ?? (tag ? [tag] : undefined),
           security: protect ? [{ Authorization: [] }] : undefined,
           parameters: getParameterObjects(inputParser, pathParameters, 'all'),
           responses: getResponsesObject(outputParser),
@@ -55,7 +55,7 @@ export const getOpenApiPathsObject = (
 
   forEachOpenApiProcedure(mutations, ({ path: mutationPath, procedure, openapi }) => {
     try {
-      const { method, protect, summary, description, tag } = openapi;
+      const { method, protect, summary, description, tags, tag } = openapi;
       if (method !== 'POST' && method !== 'PATCH' && method !== 'PUT') {
         throw new TRPCError({
           message: 'Mutation method must be POST, PATCH or PUT',
@@ -81,7 +81,7 @@ export const getOpenApiPathsObject = (
           operationId: mutationPath,
           summary,
           description,
-          tags: tag ? [tag] : undefined,
+          tags: tags ?? (tag ? [tag] : undefined),
           security: protect ? [{ Authorization: [] }] : undefined,
           requestBody: getRequestBodyObject(inputParser, pathParameters),
           parameters: getParameterObjects(inputParser, pathParameters, 'path'),
diff --git a/src/types.ts b/src/types.ts
index b9f7525e..2a52d1b4 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -15,8 +15,7 @@ export type OpenApiMeta<TMeta = Record<string, any>> = TMeta & {
     summary?: string;
     description?: string;
     protect?: boolean;
-    tag?: string;
-  };
+  } & ({ tag?: never; tags?: string[] } | { tag?: string; tags?: never });
 };
 
 export type OpenApiProcedureRecord<TMeta = Record<string, any>> = ProcedureRecord<
diff --git a/test/generator.test.ts b/test/generator.test.ts
index 82d7e382..14cd5086 100644
--- a/test/generator.test.ts
+++ b/test/generator.test.ts
@@ -888,7 +888,7 @@ describe('generator', () => {
     expect(Object.keys(openApiDocument.paths).length).toBe(0);
   });
 
-  test('with summary, description & tag', () => {
+  test('with summary, description & single tag', () => {
     const appRouter = trpc.router<any, OpenApiMeta>().query('all.metadata', {
       meta: {
         openapi: {
@@ -917,6 +917,35 @@ describe('generator', () => {
     expect(openApiDocument.paths['/metadata/all']!.get!.tags).toEqual(['tag']);
   });
 
+  test('with summary, description & multiple tags', () => {
+    const appRouter = trpc.router<any, OpenApiMeta>().query('all.metadata', {
+      meta: {
+        openapi: {
+          enabled: true,
+          path: '/metadata/all',
+          method: 'GET',
+          summary: 'Short summary',
+          description: 'Verbose description',
+          tags: ['tagA', 'tagB'],
+        },
+      },
+      input: z.object({ name: z.string() }),
+      output: z.object({ name: z.string() }),
+      resolve: ({ input }) => ({ name: input.name }),
+    });
+
+    const openApiDocument = generateOpenApiDocument(appRouter, {
+      title: 'tRPC OpenAPI',
+      version: '1.0.0',
+      baseUrl: 'http://localhost:3000/api',
+    });
+
+    expect(openApiSchemaValidator.validate(openApiDocument).errors).toEqual([]);
+    expect(openApiDocument.paths['/metadata/all']!.get!.summary).toBe('Short summary');
+    expect(openApiDocument.paths['/metadata/all']!.get!.description).toBe('Verbose description');
+    expect(openApiDocument.paths['/metadata/all']!.get!.tags).toEqual(['tagA', 'tagB']);
+  });
+
   test('with security', () => {
     const appRouter = trpc.router<any, OpenApiMeta>().mutation('protectedEndpoint', {
       meta: {