Show HN: Enframe – Drop-in sidecar that wraps any OpenAPI spec to an MCP server

Category: ai-ml

Tags: openapi, mcp, llm-agents, api-gateway, dotnet, native-aot

Score: 6.8/10 (Innovation: 6, Technical: 7, Documentation: 7, Utility: 7)

Enframe is a drop-in sidecar that wraps any OpenAPI (Swagger 2.0/OpenAPI 3.0-3.2) spec into a Model Context Protocol (MCP) server, enabling LLM agents to call existing REST APIs without custom integration code. It is built in C# with Native AOT for a ~43 MB image and infers authentication (API key, OAuth 2.0, OIDC) from the spec, mapping operations to MCP tools and schemas.

Target audience: backend developers, DevOps engineers, AI/LLM integration engineers

Repository: https://github.com/erwinkramer/enframe · C# · NOASSERTION

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