FineMCP

A production-grade Go framework for building MCP servers and clients with 16 middleware, 5 transports, and OpenTelemetry support.

A Go framework for building production-grade MCP servers and clients with full MCP spec compliance. Provides 16 production middleware components including rate limiting, RBAC per tool, circuit breaker, audit logging, and cost tracking. Supports five transport types (stdio, HTTP, SSE, Streamable HTTP, WebSocket), automatic JSON Schema generation from Go structs, multi-tenancy, and OpenTelemetry observability with a zero-network test harness.