mcp-go is a Go implementation of the Model Context Protocol that enables LLM applications to integrate with external data sources and tools through a standardized interface.
The project addresses the complexity of building MCP servers by handling protocol details and server management internally. It provides a high-level interface for exposing data through resources, enabling actions through tools, and defining interaction patterns through prompts. Resources function as data endpoints that can be static or dynamically generated from URI templates, while tools allow LLMs to perform computations and side effects. The implementation supports multiple MCP specification versions with backward compatibility.
Developers building MCP servers in Go should choose this tool if they want to minimize boilerplate and focus on application logic rather than protocol mechanics. It suits projects that need to expose capabilities to LLM applications in a standardized way, whether those capabilities involve database queries, API integrations, file access, or custom computations. The README emphasizes that the tool aims to be fast and simple compared to building protocol compliance from scratch, though it does not name specific alternative implementations for direct comparison.
The project is under active development alongside the MCP specification itself. Core features are functional but some advanced capabilities remain in progress. The maintainers provide a Discord community channel for discussion and maintain comprehensive documentation covering server setup, resource and tool definition, session management, request hooks, and middleware patterns.
