rust-mcp-transport.

rust-mcp-transport is a part of the rust-mcp-sdk ecosystem, offering transport implementations for the MCP (Model Context Protocol). It enables asynchronous data exchange and efficient MCP message handling between MCP Clients and Servers.

⚠️WARNING: Currently, only Standard Input/Output (stdio) transport is supported. Server-Sent Events (SSE) transport is under development and will be available soon.

Usage Example

For MCP Server

use rust_mcp_transport::{StdioTransport, TransportOptions};

// create a stdio transport to be used in a MCP Server
let transport = StdioTransport::new(TransportOptions { timeout: 60_000 })?;

Refer to the Hello World MCP Server example for a complete demonstration.

For MCP Client

use rust_mcp_transport::{StdioTransport, TransportOptions};

// create a stdio transport that launches `server-everything` MCP Server
let transport = StdioTransport::create_with_server_launch(
        "npx",
        vec!["-y".to_string(), "@modelcontextprotocol/server-everything"],
        None,
        TransportOptions { timeout: 60_000 }
    )?;

With environment variables:

use rust_mcp_transport::{StdioTransport, TransportOptions};

// environment variables will be available to the MCP server at launch time
let environment_value = HashMap::from([(
       "API_KEY".to_string(),
       "A1B2C3D4E5F6G7H8I9J0K1L2M3N4O5P6".to_string(),
   )]);

// configure an arbitrary MCP Server to launch with argument and environment variables
let transport = StdioTransport::create_with_server_launch(
    "your-mcp-server",
    vec!["argument".to_string()],
    Some(environment_value),
    TransportOptions::default(),
)?;

Refer to the Simple MCP Client example for a complete demonstration.

Check out rust-mcp-sdk , a high-performance, asynchronous toolkit for building MCP servers and clients. Focus on your app's logic while rust-mcp-sdk takes care of the rest!