Cargo MCP Server

A Model Context Protocol (MCP) server that provides safe access to Cargo operations for Rust projects.

Features

This MCP server exposes the following Cargo tools:

• cargo_check - Verify code compiles without producing executables
• cargo_clippy - Run the Clippy linter for code suggestions
• cargo_test - Execute project tests
• cargo_fmt_check - Check code formatting without modifying files
• cargo_build - Build the project (debug or release mode)
• cargo_bench - Run benchmarks
• cargo_add - Add dependencies to Cargo.toml
• cargo_remove - Remove dependencies from Cargo.toml
• cargo_update - Update dependencies
• cargo_clean - Remove artifacts that cargo has generated in the past
• cargo_run - Run a binary or example

All tools support setting custom environment variables via the cargo_env parameter and rust toolchain with the toolchain parameter.

Installation

cargo install cargo-mcp

Usage with Claude Desktop

Add this to your Claude Desktop MCP configuration:

{
  "mcpServers": {
    "cargo-mcp": {
      "command": "/path/to/cargo-mcp/cargo-mcp",
      "args": ["serve"]
    }
  }
}

Optionally, include "env": {"CARGO_MCP_DEFAULT_TOOLCHAIN": {{toolchain}} } in the arguments where {{toolchain}} is something like “nightly” or “stable”

Safety Features

• Only whitelisted Cargo commands are available
• Path validation ensures the target is a valid Rust project (has Cargo.toml)
• No arbitrary command execution
• All commands run in the specified project directory

License

MIT or APACHE-2.0