mcp

^{Rust framework for Model Context Protocol}

Rust framework for building Model Context Protocol servers and clients.

Note

Part of the PulseEngine toolchain. Provides the MCP implementation used across PulseEngine's AI-assisted development infrastructure.

Example

use pulseengine_mcp_macros::{mcp_server, mcp_tools};use schemars::JsonSchema;use serde::{Deserialize,Serialize};#[derive(Debug,Clone,Serialize,Deserialize,JsonSchema)]pubstructGreetParams{pubname:Option<String>,}#[mcp_server(name = "My Server")]#[derive(Default,Clone)]pubstructMyServer;#[mcp_tools]implMyServer{/// Greet someone by namepubasyncfngreet(&self,params:GreetParams) -> anyhow::Result<String>{let name = params.name.unwrap_or_else(|| "World".to_string());Ok(format!("Hello, {name}!"))}}#[tokio::main]asyncfnmain() -> Result<(),Box<dyn std::error::Error>>{MyServer::configure_stdio_logging();MyServer::with_defaults().serve_stdio().await?.run().await}

The #[mcp_server] and #[mcp_tools] macros generate the protocol implementation. Tool schemas are derived from your Rust types via JsonSchema.

Crates

Crate	Description
mcp-protocol	MCP types, JSON-RPC, schema validation
mcp-server	Server infrastructure with McpBackend trait
mcp-client	Client for connecting to MCP servers
mcp-transport	stdio, HTTP, WebSocket transports
mcp-auth	Authentication, API keys, OAuth 2.1
mcp-security	Input validation, rate limiting
mcp-logging	Structured logging with credential sanitization
mcp-macros	#[mcp_server], #[mcp_tools], #[mcp_resource]

Examples

• hello-world — Minimal server
• hello-world-with-auth — With authentication
• resources-demo — Resource templates with #[mcp_resource]
• ui-enabled-server — MCP Apps extension (SEP-1865)

MCP Spec

Implements MCP 2025-11-25: tools, resources, prompts, completions, sampling, roots, logging, progress, cancellation, tasks, and elicitation.

License

MIT OR Apache-2.0

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_{Part of PulseEngine — a WebAssembly toolchain for safety-critical systems, with formally verified components}