Rust MCP SDK: Complete Developer Guide

Overview

The Rust MCP SDK is the official library for building MCP servers in Rust. It supports tools, resources, prompts, transports, and the stdio and streamable-http transport.

Installation

cargo add rmcp

Minimal Server Example

# See https://modelcontextprotocol.io/sdks/rust for examples

Adding a Tool

Tools are the primary way MCP servers expose functionality to clients. Each tool has a name, input schema, and handler function.

# Tool registration varies by SDK

Supported Features

Testing Your Server

1. Start the server and verify it prints no startup errors.
2. Run npx @modelcontextprotocol/inspector and connect over stdio.
3. Call your tools and verify they return the expected responses.
4. Connect from Claude Desktop and confirm tool visibility.