rust-docs-mcp-server

Overview

This MCP server solves the problem of outdated AI suggestions for Rust code by providing current documentation on demand. It fetches crate docs, generates embeddings, and exposes a query tool that LLM assistants can use to get accurate information before writing code. The server supports multiple instances for different crates, allows feature-specific documentation generation, and implements caching to improve performance and reduce API costs.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• query_rust_docs

  Query documentation for the specific Rust crate the server was started for, using semantic search and LLM summarization.

  Try:How do I make a simple GET request with reqwest?Try:Show me an example of serializing a struct with serde

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Installation

git clone https://github.com/Govcraft/rust-docs-mcp-server.git
cd rust-docs-mcp-server
cargo build --release

{
  "mcpServers": {
    "rust-docs-serde": {
      "command": "/path/to/rustdocs_mcp_server",
      "args": ["serde@^1.0"]
    },
    "rust-docs-tokio": {
      "command": "rustdocs_mcp_server",
      "args": ["tokio"]
    }
  }
}

FAQ

What API key is required?

The server requires an OpenAI API key available in the OPENAI_API_KEY environment variable for generating embeddings and summarizing answers.

How are different crate features handled?

Use the -F or --features flag to specify required crate features. Different feature sets are cached separately.

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