MCP Docs Rust Server

Fetches Rust crate docs from docs.rs via rustdoc JSON API with caching and item-level lookups.

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Language

4 months ago

First Indexed

3 weeks ago

Catalog Refreshed

Documentation & install

Readme and setup notes from the catalogue, plus a client-ready config you can copy for your MCP host.

Installation

Add the following to your MCP client configuration file.

Configuration

View docs

{
  "mcpServers": {
    "vexxvakan-mcp-docsrs": {
      "command": "node",
      "args": [
        "/path/to/mcp-docsrs/dist/index.js"
      ],
      "env": {
        "DB_PATH": ":memory:",
        "CACHE_TTL": "3600000",
        "MAX_CACHE_SIZE": "100",
        "REQUEST_TIMEOUT": "30000"
      }
    }
  }
}

You deploy and run an MCP server that fetches Rust crate documentation from docs.rs via the rustdoc JSON API. It provides fast, item-level lookups with built-in caching, supports multiple platforms, and ships as a single executable or via Docker. It is designed to give you fast access to Rust documentation for crates and their items, with easy integration into your own MCP client workflows.

How to use

You use this MCP server by configuring it as a local (stdio) server or by pointing an MCP client at a remote HTTP MCP endpoint. The server exposes tools to fetch crate documentation, specific items within crates, and to search crates on crates.io. You can run it in production or development mode and then query it from your MCP client to retrieve rustdoc JSON data for crates, versions, and items.

To fetch documentation for an entire crate, you call the crate docs lookup tool and provide the crate name and optional version or semver range. To fetch a single item, you call the item docs lookup tool and provide the crate name and the item path such as a struct or function name. To discover crates by name, you use the crate search tool and provide a query string.

Available tools

lookup_crate_docs

Fetches comprehensive documentation for an entire Rust crate. Parameters include crateName, version, target, and formatVersion.

lookup_item_docs

Fetches documentation for a specific item within a crate. Parameters include crateName and itemPath, plus optional version and target.

search_crates

Search crates on crates.io with fuzzy or partial name matching. Parameters include query and limit.