RMCP Quickstart

Résultat attendu:

• I'll guide you through building your first MCP server with rmcp. Let's start:
•  
• 1. Create a new Rust project
• 2. Add rmcp dependencies to Cargo.toml
• 3. Define your service struct with the #[tool] macro
• 4. Create a stdio transport
• 5. Run and test your server
•  
• Here's the basic pattern:
• ```rust
• #[tool(tool_box)]
• struct MyService;
•  
• #[tool(tool_box)]
• impl MyService {
• #[tool(description = "Say hello")]
• async fn greet(&self, name: String) -> String {
• format!("Hello, {}!", name)
• }
• }
•  
• #[tokio::main]
• async fn main() -> Result<(), Box<dyn std::error::Error>> {
• let service = MyService;
• let transport = stdio_transport();
• service.serve(transport).await?;
• Ok(())
• }
• ```

Résultat attendu:

• Use thiserror to define error types, then return Result from your tools:
•  
• ```rust
• use thiserror::Error;
•  
• #[derive(Debug, Error)]
• enum MyError {
• #[error("Not found: {0}")]
• NotFound(String),
•  
• #[error("Invalid input: {0}")]
• InvalidInput(String),
• }
•  
• #[tool(tool_box)]
• impl MyService {
• async fn fetch(&self, id: String) -> Result<String, MyError> {
• if id.is_empty() {
• return Err(MyError::InvalidInput("ID cannot be empty".into()));
• }
• Ok("Item data".to_string())
• }
• }
• ```