Rust MCP SDK

cargo new my-mcp-server
cd my-mcp-server

[dependencies]
rust-mcp-sdk = { version = "0.9.0", default-features = false, features = ["server", "macros", "stdio"] }
tokio = { version = "1", features = ["full"] }
async-trait = "0.1"
serde = { version = "1", features = ["derive"] }
serde_json = "1"

use rust_mcp_sdk::macros;
use serde::{Deserialize, Serialize};

#[macros::mcp_tool(name = "say_hello", description = "Returns a greeting message")]
#[derive(Debug, Deserialize, Serialize, macros::JsonSchema)]
pub struct SayHelloTool {
    pub name: String,
}

use rust_mcp_sdk::{ServerHandler, schema::*};
use async_trait::async_trait;

struct HelloHandler;

#[async_trait]
impl ServerHandler for HelloHandler {
    async fn handle_list_tools_request(
        &self,
        _request: ListToolsRequest,
        _runtime: &dyn McpServerRuntime,
    ) -> Result<ListToolsResult, RpcError> {
        Ok(ListToolsResult {
            tools: vec![SayHelloTool::tool()],
            meta: None,
            next_cursor: None,
        })
    }
}

use rust_mcp_sdk::{McpServer, StdioTransport};

#[tokio::main]
async fn main() {
    let transport = StdioTransport::new();
    let server = McpServer::new(HelloHandler, transport);
    server.run().await.unwrap();
}

cargo build --release
# Then add to claude_desktop_config.json:
{
  "mcpServers": {
    "my-mcp-server": {
      "command": "/path/to/my-mcp-server/target/release/my-mcp-server",
      "args": []
    }
  }
}