tokimo-package-mcp

MCP (Model Context Protocol) client for Rust — protocol types, transports, client connection management.

Features

• Full MCP protocol — types for tools, resources, prompts, sampling, and capabilities
• Multiple transports:
  • StdioTransport — launch an MCP server as a subprocess, communicate over stdin/stdout
  • HttpTransport — connect to an HTTP-based MCP server (SSE + POST)
• Connection management — McpConnection tracks server state (initializing / ready / error), reconnects
• Tool name utilities — build/parse structured MCP tool names with server prefix (build_mcp_tool_name)
• Streaming — async tool call results via tokio streams

Usage

use tokimo_package_mcp::{McpClient, transport::stdio::StdioTransport};

let transport = StdioTransport::spawn("npx", &["-y", "@modelcontextprotocol/server-filesystem", "/tmp"]).await?;
let client = McpClient::new(transport);
client.initialize().await?;

let tools = client.list_tools(None).await?;
for tool in &tools {
    println!("{}: {}", tool.name, tool.description.as_deref().unwrap_or(""));
}

let result = client.call_tool("read_file", serde_json::json!({ "path": "/tmp/test.txt" })).await?;

Cargo

tokimo-package-mcp = { git = "https://github.com/tokimo-lab/tokimo-package-mcp" }

License

MIT