Rust Analyzer
A Model Context Protocol (MCP) server that provides integration with rust-analyzer
What is Rust Analyzer?
Rust Analyzer is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to model context protocol (mcp) server that provides integration with rust-analyzer
A Model Context Protocol (MCP) server that provides integration with rust-analyzer
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- A Model Context Protocol (MCP) server that provides integrat
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx rust-analyzerConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Rust Analyzer
Rust Analyzer MCP Server integrates the rust-analyzer language server into MCP-compatible AI clients, giving models IDE-grade understanding of Rust codebases. Through ten exposed tools, AI assistants can list symbols in a file, jump to definitions, find all references, get hover documentation, trigger code completions, run diagnostics, apply quick fixes, format code, and switch workspace roots. This enables Claude and other models to reason about real Rust code with the same accuracy as a developer using VS Code or IntelliJ.
Prerequisites
- Rust toolchain (1.70 or higher) with Cargo installed via rustup
- rust-analyzer installed: run 'rustup component add rust-analyzer'
- A Rust project with a valid Cargo.toml in the workspace root
- An MCP-compatible client such as Claude Desktop or Claude Code
Install rust-analyzer-mcp from crates.io
Install the MCP server binary using Cargo. This is the recommended installation method as it pulls the latest published release.
cargo install rust-analyzer-mcpEnsure rust-analyzer is available
The MCP server delegates analysis to the rust-analyzer binary, which must be in your PATH.
rustup component add rust-analyzer
# Verify it is accessible:
rust-analyzer --versionConfigure Claude Desktop
Add rust-analyzer-mcp to your Claude Desktop configuration. No environment variables or API keys are needed — the server works entirely with your local Rust toolchain.
{
"mcpServers": {
"rust-analyzer": {
"command": "rust-analyzer-mcp"
}
}
}Set the workspace root
Before analyzing code, use the rust_analyzer_set_workspace tool to point the server at your Rust project directory containing Cargo.toml.
Run diagnostics to verify everything works
Ask Claude to run workspace diagnostics on your Rust project to confirm the server is connected and rust-analyzer is functioning correctly.
Rust Analyzer Examples
Client configuration
Claude Desktop or Claude Code configuration for the Rust Analyzer MCP server.
{
"mcpServers": {
"rust-analyzer": {
"command": "rust-analyzer-mcp"
}
}
}Prompts to try
Example prompts that exercise the rust-analyzer MCP tools for code analysis and navigation.
- "List all functions and structs defined in src/main.rs"
- "Find the definition of the 'Router' struct in this workspace"
- "Show me all places where the 'parse_config' function is called"
- "Get the documentation and type signature for the variable at line 42 in src/server.rs"
- "Run diagnostics on src/lib.rs and show me any errors or warnings"
- "Format the code in src/handlers.rs using rustfmt rules"Troubleshooting Rust Analyzer
rust-analyzer-mcp fails with 'rust-analyzer not found'
Run 'rustup component add rust-analyzer' to install the component, then verify with 'rust-analyzer --version'. If installed via rustup, make sure ~/.cargo/bin is in your PATH.
Diagnostics return 'workspace not set' or empty results
Call rust_analyzer_set_workspace with the absolute path to your project's Cargo.toml directory before running any other tools. The server needs to know which workspace to analyze.
Server takes a long time to respond on the first query
rust-analyzer needs to index the project on startup, which can take 30-60 seconds for large workspaces. Subsequent queries will be much faster once the index is built and cached.
Frequently Asked Questions about Rust Analyzer
What is Rust Analyzer?
Rust Analyzer is a Model Context Protocol (MCP) server that model context protocol (mcp) server that provides integration with rust-analyzer It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Rust Analyzer?
Follow the installation instructions on the Rust Analyzer GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Rust Analyzer?
Rust Analyzer works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Rust Analyzer free to use?
Yes, Rust Analyzer is open source and available under the MIT license. You can use it freely in both personal and commercial projects.
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