Rust Documentation Query Agent

This Model Context Protocol (MCP) service exposes an interface to the rich documentation corpus available on docs.rs for the Rust language. It empowers AI agents to investigate Rust libraries, type structures, versioning schemes, and source file locations.

Capabilities

• Execute searches across the docs.rs crate registry.
• Retrieve detailed documentation for specific libraries and their versions.
• Inspect type signatures (structs, traits, enums, etc.).
• Determine active feature gates/flags for a given crate.
• List all published versions for a library.
• Fetch the actual source code snippet for an item.
• Perform symbol lookups across the documented codebase.

Setup Prerequisites

The toolchain relies on Bun for development tasks, though the final deployed artifact runs under Node.js.

bash

Obtain the repository

git clone https://github.com/yourusername/rust-docs-mcp-server.git cd rust-docs-mcp-server

Install necessary dependencies

bun install

Compilation Process

bash

Build the operational server artifact

bun run build

This command results in compiled JavaScript assets within the build directory.

Execution

bash

Start in development mode

bun run dev

Or execute the compiled release version

bun run start

Integration with MCP Consumers

As an MCP implementation, this server is consumable by any compliant client by directing the client's configuration to this service's endpoint.

Exposed Toolset

The following functions are available via the protocol:

• search_crates: For registry-wide crate searching.
• get_crate_documentation: Retrieves narrative docs for a specified crate/version.
• get_type_info: Provides structural details on a symbol.
• get_feature_flags: Lists enabled features for a package.
• get_crate_versions: Enumerates available releases.
• get_source_code: Fetches the corresponding source material.
• search_symbols: Finds symbols within a specific library context.

Verification

bash

Execute automated tests

bun test

Licensing

This software is distributed under the MIT License.