crates-mcp

A local MCP server used to fetch Rust crate information and docs from crates.io and docs.rs

5 stars RustDeveloper Kits Updated Sep 8, 2025

Documentation

Crates MCP Server

MCP server for querying Rust crates from crates.io and docs.rs. Search crates, get info, versions, dependencies, and documentation.

Quick Start

bash

# Build and run
cargo build --release
cargo run --release

Tools

`search_crates` - Find crates by name
`get_crate_info` - Get details about a crate
`get_crate_versions` - List versions
`get_crate_dependencies` - Show dependencies
`get_crate_documentation` - Get docs from docs.rs

Claude Code Integration

Add to your Claude Code MCP configuration:

Option 1: Run directly

json

{
  "mcpServers": {
    "crates": {
      "command": "cargo",
      "args": ["run", "--release"],
      "cwd": "/path/to/crates-mcp"
    }
  }
}

Option 2: Use binary

bash

# Build first
cargo build --release

# Add to config
{
  "mcpServers": {
    "crates": {
      "command": "/path/to/crates-mcp/target/release/crates-mcp"
    }
  }
}

Config file locations:

macOS: `~/Library/Application Support/Claude/claude_desktop_config.json`
Windows: `%APPDATA%\Claude\claude_desktop_config.json`
Linux: `~/.config/claude/claude_desktop_config.json`

Restart Claude Code after adding the config.

Usage Examples

code

# Search for HTTP clients
> Search for "http client" crates

# Get info about reqwest
> What is the reqwest crate?

# Check tokio dependencies  
> Show me tokio's dependencies

# View serde documentation
> Show me the docs for serde

Development

bash

# Test
cargo test

# Format  
cargo fmt

# Lint
cargo clippy

License

MIT

Frequently asked questions

What is crates-mcp?

crates-mcp is A local MCP server used to fetch Rust crate information and docs from crates.io and docs.rs

How do I install crates-mcp?

Open the GitHub repository and follow its README. Most MCP servers are added to your client's MCP config, then called by your agent.

Is crates-mcp open source?

Yes — it is hosted on GitHub at https://github.com/pato/crates-mcp and has 5 stars.

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