openapi-mcp-server
This project is a server that dynamically creates Model Context Protocol (MCP) tools and resources from OpenAPI specifications. It allows Large Language Models (LLMs) to interact with APIs through the
Score
78/100
9,446 stars
1,457 forks
A low score is not a verdict on quality. Young and niche tools start low by design. How we calculate scores
The Open Source Drop Lens
OpenAPI MCP takes any OpenAPI spec and turns it into callable MCP tools automatically. Point it at a spec file or URL and your AI assistant can call every endpoint. No hand-written tool definitions needed.
Completely free. The underlying APIs you call may have their own costs, but the MCP itself is just a translation layer. AWS Labs maintains it.
This is one of the most versatile servers in the AWS MCP suite. Any API with an OpenAPI spec becomes an AI tool instantly. The catch: auto-generated tools can be noisy. Large specs produce dozens of tools, and your AI assistant may struggle to pick the right one.
Cost Breakdown
fully freeFree Tier
The MCP server itself is completely free and open source.
Self-Hosted
Runs locally or on your own infrastructure.
Paid
No paid tier. The underlying service may have its own pricing.
Free and open source. The underlying service may have its own costs.
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