Module client 

Available on crate feature client only.

MCP Client transports for connecting to external MCP servers.

This module provides client-side transports that implement the McpTransport trait for connecting to and communicating with external MCP servers.

Architecture

┌─────────────────────────────────────────────────────────────────┐
│                      Your Application                           │
│                                                                 │
│  ┌───────────────────────────────────────────────────────────┐ │
│  │                        McpHub                              │ │
│  │              (manages multiple connections)                │ │
│  │                                                            │ │
│  │   ┌─────────────────┐       ┌─────────────────────────┐   │ │
│  │   │ StdioTransport  │       │    HttpTransport        │   │ │
│  │   │ (spawn process) │       │   (HTTP POST)           │   │ │
│  │   └─────────────────┘       └─────────────────────────┘   │ │
│  └───────────────────────────────────────────────────────────┘ │
│                            │                                    │
└────────────────────────────┼────────────────────────────────────┘
                             │
                             ▼
             ┌───────────────────────────────┐
             │     External MCP Servers      │
             │  (Node.js, Python, etc.)      │
             └───────────────────────────────┘

Example

use mcp::client::StdioTransportAdapter;
use mcp::transport::McpTransport;

// Connect to an MCP server process
let transport = StdioTransportAdapter::connect(
    "node",
    &["mcp-server.js".to_string()],
    None,
    Duration::from_secs(30),
).await?;

// List available tools
let tools = transport.list_tools().await?;

// Call a tool
let result = transport.call_tool("my_tool", json!({"arg": "value"})).await?;

Re-exports

pub use stdio::AsyncStdioTransport;

pub use stdio::StdioTransportAdapter;

pub use stdio::TokioStdioTransport;

pub use http::HttpTransport;

pub use http::HttpTransportAdapter;

Modules

http

HTTP Transport for connecting to MCP servers.

stdio

Stdio Transport for connecting to MCP server processes.