rs-fast-mcp 0.2.0

High-performance, async-first Rust implementation of the Model Context Protocol (MCP)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

//! Client-side transport abstractions.
//!
//! The [`ClientTransport`] trait defines the send/receive interface that concrete
//! transports (Stdio, SSE) implement. The [`Client`](super::Client) drives the
//! transport in a background loop.
//!
//! - [`stdio`] — Spawns a child process and communicates over stdin/stdout.
//! - [`sse`] — Connects to an HTTP/SSE endpoint.

use crate::error::FastMCPError;
use crate::mcp::types::JsonRpcMessage;
use async_trait::async_trait;
use std::fmt::Debug;

/// Low-level send/receive interface implemented by each client transport.
#[async_trait]
pub trait ClientTransport: Send + Sync + Debug {
    /// Sends a JSON-RPC message to the server.
    async fn send(&self, message: JsonRpcMessage) -> Result<(), FastMCPError>;
    /// Waits for and returns the next incoming JSON-RPC message.
    async fn receive(&self) -> Result<JsonRpcMessage, FastMCPError>;
}

pub mod sse;
pub mod stdio;