The Model Context Protocol (MCP) is one of the most exciting emerging concepts, extending LLM capabilities to interact with real-world data and tools. For Apple platform developers, building an MCP server in Swift is an excellent way to get started. In this post, Adam Wulf shares his experience using the mcp-swift-sdk to implement a basic MCP server. He explains the architecture, stdio-based transport, tool registration and invocation, and how to integrate with Cursor and Claude for testing and development.
The mcp-swift-sdk is a Swift implementation of the MCP spec by Mattt, who also built iMCP, a macOS app that grants MCP clients access to system calendar, contacts, messages, reminders, and weather data.
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