SwiftMCP MCP Server

What is SwiftMCP?

SwiftMCP is a Swift implementation of the Model Context Protocol (MCP) for JSON-RPC communication over multiple transports. It is intended for Swift developers who want to build MCP servers or clients that expose tools, resources, and prompts to AI models and other MCP-aware applications.

How to use SwiftMCP?

Add SwiftMCP as a dependency in your Package.swift, then declare a server with the @MCPServer macro, define tools with @MCPTool, and configure a transport such as stdio, HTTP+SSE, or TCP+Bonjour. The included demo provides commands like SwiftMCPDemo stdio and SwiftMCPDemo httpsse --port 8080.

Key features of SwiftMCP

• Multiple transport options: stdio, HTTP+SSE, TCP+Bonjour
• JSON-RPC 2.0 compliance with OpenAPI generation
• Built-in authorization and optional OAuth validation
• Macros for tools (@MCPTool), resources (@MCPResource), and prompts (@MCPPrompt)
• Typed client proxy generation for any MCP server
• Cross-platform support (macOS, Linux, Windows via trait selection)

Use cases of SwiftMCP

• Building a command‑line MCP server that communicates via stdin/stdout
• Exposing server tools over HTTP with Server‑Sent Events for web clients
• Creating a locally discoverable server using TCP+Bonjour for LAN environments
• Generating a typed Swift client proxy from any MCP server’s tool schema
• Adding OAuth‑protected endpoints that integrate with AI plugin manifests