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RMCP

Crates.io Version

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An official Rust Model Context Protocol SDK implementation with tokio async runtime.

This repository contains the following crates:

Usage

Import the crate

rmcp = { version = "0.2.0", features = ["server"] }
## or dev channel
rmcp = { git = "https://github.com/modelcontextprotocol/rust-sdk", branch = "main" }

Third Dependencies

Basic dependencies:

Build a Client

Start a client
use rmcp::{ServiceExt, transport::{TokioChildProcess, ConfigureCommandExt}};
use tokio::process::Command;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = ().serve(TokioChildProcess::new(Command::new("npx").configure(|cmd| {
        cmd.arg("-y").arg("@modelcontextprotocol/server-everything");
    }))?).await?;
    Ok(())
}

Build a Server

Build a transport
use tokio::io::{stdin, stdout};
let transport = (stdin(), stdout());
Build a service

You can easily build a service by using ServerHandler or ClientHandler.

let service = common::counter::Counter::new();
Start the server
// this call will finish the initialization process
let server = service.serve(transport).await?;
Interact with the server

Once the server is initialized, you can send requests or notifications:

// request
let roots = server.list_roots().await?;

// or send notification
server.notify_cancelled(...).await?;
Waiting for service shutdown
let quit_reason = server.waiting().await?;
// or cancel it
let quit_reason = server.cancel().await?;

Examples

See examples

OAuth Support

See oauth_support for details.

Development

Tips for Contributors

See docs/CONTRIBUTE.MD to get some tips for contributing.

Using Dev Container

If you want to use dev container, see docs/DEVCONTAINER.md for instructions on using Dev Container for development.

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