Crate crates_docs 

Crates Docs MCP Server

A high-performance Rust crate documentation query MCP server, supporting multiple transport protocols and OAuth authentication.

Main Features

• Crate Documentation Query: Fetch complete documentation for a crate from docs.rs
• Crate Search: Search Rust crates from crates.io
• Item Documentation Lookup: Find specific types, functions, or modules in a crate
• Health Check: Check server and external service status

Transport Protocol Support

• stdio: Standard input/output (suitable for MCP client integration)
• http: HTTP transport (Streamable HTTP)
• sse: Server-Sent Events
• hybrid: Hybrid mode (HTTP + SSE)

Cache Support

• Memory Cache: High-performance memory cache based on moka, supporting TinyLFU eviction strategy and per-entry TTL
• Redis Cache: Supports distributed deployment (requires cache-redis feature)

Example

use crates_docs::{AppConfig, CratesDocsServer};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Create server with default configuration
    let config = AppConfig::default();
    let server = CratesDocsServer::new(config)?;

    // Run HTTP server
    server.run_http().await?;

    Ok(())
}

Re-exports

pub use crate::config::AppConfig;

pub use crate::config::ServerConfig;

pub use crate::error::Error;

pub use crate::error::Result;

pub use crate::server::CratesDocsServer;

Modules

cache

Cache module

cli

CLI module

config

Configuration module

config_reload

Configuration hot-reload functionality

error

Error handling module

metrics

Metrics module for Prometheus monitoring

server

Server module

tools

MCP tool module

utils

Utility functions module

Constants

NAME

Server name

VERSION

Server version

Functions

init_logging_with_config

Initialize logging system with configuration