Actix Backend

Add rust-mcp-actix to your dependencies:

[dependencies]
rust-mcp-actix = "1.0"
rust-mcp-sdk = { version = "1.0", default-features = false, features = ["server", "macros"] }

Creating an Actix MCP Server

use rust_mcp_actix::{create_actix_server, ActixServerOptions};

let server = create_actix_server(
    server_info,
    handler.to_mcp_server_handler(),
    ActixServerOptions {
        host: "127.0.0.1".into(),
        port: 8080,
        event_store: Some(Arc::new(InMemoryEventStore::default())),
        task_store: Some(Arc::new(InMemoryTaskStore::new(None))),
        auth: None,
        health_endpoint: Some("/health".into()),
        sse_support: true,
        ..Default::default()
    },
);
server.start().await?;

ActixServerOptions mirrors AxumServerOptions field-for-field.

Feature Comparison

Feature	Axum	Actix
Streamable HTTP	✅	✅
SSE	✅	✅
Resumability	✅	✅
Tasks	✅	✅
Auth	✅	✅
Health Check	✅	✅
DNS Rebinding Protection	✅	✅