MCP Rust SDK

MCP Rust SDK is a Rust software development kit to build Model Context Protocol servers and clients.

The rmcp crate provides the official Rust SDK for the Model Context Protocol. Developers use it to build MCP servers that expose tools, resources, and prompts to AI assistants, or to build clients that connect to those servers. The SDK supports features like resources, prompts, sampling, roots, logging, completions, and subscriptions. It includes a pluggable transport layer with built-in support and helper traits for various stream, sink, read, and write conversions. It also offers attribute macros for prompts and tools, basic data types, and transport options including TLS backends.

MCP Rust SDK at a glance

Best for: Software engineer
Pricing: Free
Released: February 2025
Category: AI coding tool
Website: docs.rs

Key features

Build Model Context Protocol servers
Build Model Context Protocol clients
Expose tools to AI assistants
Expose resources and prompts
Pluggable transport layer
Attribute macros for prompts and tools
Basic data types in MCP specification

Use it for

Build MCP servers for AI assistants
Build MCP clients to connect to servers
Expose tools and resources via Rust

Alternatives to MCP Rust SDK

MCP Python SDK — Builds protocol servers and clients using standard Python type hints.
MCP Java SDK — Official Java implementation with core STDIO, SSE, and Streamable HTTP transports.
MCP TypeScript SDK — Official TypeScript implementation of the Model Context Protocol.
Official MCP Servers — Find trusted official MCP servers without unofficial forks or abandoned projects.
FastMCP — The standard framework for building Model Context Protocol servers and clients.
MCP C# SDK — Official C# implementation for the Model Context Protocol.
Coding Tools MCP — Turns any chat app into a coding agent with strict workspace safety boundaries.
FastMCP TS — Provides an open-source TypeScript framework for Model Context Protocol servers.
MCP Server Finder — It provides a comprehensive directory with detailed profiles and compatibility matrices.
MCP Toolbox for Databases — Connects AI agents to diverse enterprise databases with built-in security and observability.
Spec Workflow MCP — It brings sequential spec creation and real-time tracking to your AI workflow.
AWS MCP Servers — Provides real-time access to official AWS documentation and infrastructure tools.

All MCP Rust SDK alternatives