rust-sdk/examples/clients/src/sse.rs

use anyhow::Result;
use rmcp::model::{ClientCapabilities, ClientInfo, Implementation};
use rmcp::{ServiceExt, model::CallToolRequestParam, transport::SseTransport};

use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::util::SubscriberInitExt;

#[tokio::main]
async fn main() -> Result<()> {
    // Initialize logging
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| format!("info,{}=debug", env!("CARGO_CRATE_NAME")).into()),
        )
        .with(tracing_subscriber::fmt::layer())
        .init();
    let transport = SseTransport::start("http://localhost:8000/sse").await?;
    let client_info = ClientInfo {
        protocol_version: Default::default(),
        capabilities: ClientCapabilities::default(),
        client_info: Implementation {
            name: "test sse client".to_string(),
            version: "0.0.1".to_string(),
        },
    };
    let client = client_info.serve(transport).await.inspect_err(|e| {
        tracing::error!("client error: {:?}", e);
    })?;

    // Initialize
    let server_info = client.peer_info();
    tracing::info!("Connected to server: {server_info:#?}");

    // List tools
    let tools = client.list_tools(Default::default()).await?;
    tracing::info!("Available tools: {tools:#?}");

    let tool_result = client
        .call_tool(CallToolRequestParam {
            name: "increment".into(),
            arguments: serde_json::json!({}).as_object().cloned(),
        })
        .await?;
    tracing::info!("Tool result: {tool_result:#?}");
    client.cancel().await?;
    Ok(())
}