tRPC <-> MCP Server

What is tRPC <-> MCP?

tRPC <-> MCP is a library that allows you to serve tRPC routes via the Model Context Protocol (MCP). It is designed for developers who want to expose their tRPC procedures as MCP tools using a standard transport like stdio.

How to use tRPC <-> MCP?

First, add McpMeta to your tRPC initialization and enable openapi meta on each procedure. Then use createMcpServer from the trpc-mcp package to build an MCP server, passing your app router. Finally, connect the server to a transport (e.g., StdioServerTransport) and start listening.

Key features of tRPC <-> MCP

• Integrates tRPC routes with the Model Context Protocol
• Uses openapi meta for route metadata and documentation
• Supports stdio transport via StdioServerTransport
• Lightweight setup with minimal code changes
• Works with existing tRPC v11+ routers

Use cases of tRPC <-> MCP

• Expose tRPC query procedures as MCP tools for AI agents
• Bridge tRPC backends with MCP clients using standard transport
• Create a simple MCP server from an existing tRPC application

FAQ from tRPC <-> MCP

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