trpc-mcp

trpc-mcp

20
developer_tools

The project enables serving tRPC routes using the Model Context Protocol, making it easier to integrate with existing MCP systems. It focuses on transforming tRPC procedures into MCP compatible formats.

tRPC <-> MCP

Serve tRPC routes via MCP.

Usage

2. Add to meta

import { initTRPC } from '@trpc/server';
import { type McpMeta } from 'trpc-to-openapi';

const t = initTRPC.meta<McpMeta>().create();

3. Enable for routes

export const appRouter = t.router({
  sayHello: t.procedure
    .meta({ openapi: { enabled: true, description: 'Greet the user' } })
    .input(z.object({ name: z.string() }))
    .output(z.object({ greeting: z.string() }))
    .query(({ input }) => {
      return { greeting: `Hello ${input.name}!` };
    });
});

4. Serve

import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import { createMcpServer } from 'trpc-mcp';

const mcpServer = createMcpServer(
  { name: 'trpc-mcp-example', version: '0.0.1' },
  appRouter,
);

const transport = new StdioServerTransport();
await mcpServer.connect(transport);