OpenAPI Proxy
Converts OpenAPI specifications into MCP endpoints that Claude can use to explore and understand APIs. Searches through oapis.org to find and analyze API documentation.
Convert OpenAPI specs into usable MCP endpoints.
What it does
- Search OpenAPI specifications from oapis.org
- Get overview summaries of API specifications
- Retrieve details about specific API operations
- Parse both JSON and YAML OpenAPI formats
Best for
About OpenAPI Proxy
OpenAPI Proxy is a community-built MCP server published by janwilmake that provides AI assistants with tools and capabilities via the Model Context Protocol. Easily convert your OpenAPI specification into usable MCP endpoints with OpenAPI Proxy. Streamline API integration and b It is categorized under developer tools. This server exposes 2 tools that AI clients can invoke during conversations and coding sessions.
How to install
You can install OpenAPI Proxy in your AI client of choice. Use the install panel on this page to get one-click setup for Cursor, Claude Desktop, VS Code, and other MCP-compatible clients. This server runs locally on your machine via the stdio transport.
License
OpenAPI Proxy is released under the MIT license. This is a permissive open-source license, meaning you can freely use, modify, and distribute the software.
Tools (2)
Get an overview of an OpenAPI specification. This should be the first step when working with any API. - openai - OpenAI is a large AI service provider providing state of the art models in various modalities. - github - GitHub is where one hosts their code in a central location, to collaborate with others - socialdata.tools - podscan.fm - Search through podcast transcripts, get alerts - x - Official Twitter/X API - cloudflare - Cloudflare provides content delivery network services, cloud cybersecurity, DDoS mitigation, wide area network services, Domain Name Service, and ICANN-accredited domain registration services - npm-registry - supabase - Create hosted Postgres Databases with API - hackernews - Readonly API for posts, comments, and profiles from news.ycombinator.com - stripe - Create a paywall for your app or invoices - slack - A very common app used for communication at work - vercel - Vercel is a cloud hosting solution for full stack applications - val-town - Host serverless APIs - firecrawl - API for interacting with Firecrawl services to perform web scraping and crawling tasks. - playht - The PlayHT's API API allows developers to Realtime Text to Speech streaming Stream audio bytes from text, Convert long form Text to Speech Generate audio from text, and Voice Cloning Instant Cloning. - serper - The worlds fastest and cheapest google search api - replicate - brandwatch - Watch social media about your brand - jina-reader - Read webpages in markdown, html, or screenshot - upstash-redis - Control a Redis database over API - upstash-qstash - Scheduling and batching API calls - upstash-vector - Control a Vector database over API - digitalocean - apisguru - Public API to find OpenAPIs on https://apis.guru - groq - Cloud AI Provider with multiple transformer LLMs and other modalities, with very fast inference - notion-dbs - Notion Databases API - posthog-capture-api - Posthog is a Product analytics platform allowing companies to track and understand their users - google-analytics4 - The Google Analytics Admin API allows for programmatic access to the Google Analytics 4 (GA4) configuration data and is only compatible with GA4 properties - google-analytics3 - Views and manages your Google Analytics data (GA3) - anthropic-message-api - probo-nl - whatsapp-business - The WhatsApp Business Platform gives medium to large businesses the ability to connect with customers at scale. You can start WhatsApp conversations with your customers in minutes, send them care notifications or purchase updates, offer personalized services, and provide support in the channel that your customers prefer. - shopify - Shopify Admin API - twilio-messaging - huggingface - doppio - multion - browserless - Web browsing API - bol-com-retailer - Dutch shopping platform - statusbrew - Social media planning API for facebook, instagram, twitter, linkedin, google my business, pinterest, youtube, and tiktok. - swagger-validator - Validators for swagger 2.0 and 3.x specifications of OpenAPIs - google-mail - Manage GMail - youtube-data - The YouTube Data API v3 is an API that provides access to YouTube data, such as videos, playlists, and channels. - google-sheets - google-drive - google-secret-manager - flyio - vapi - klippa - uberduck - twilio - saltedge - Bank integrations - google-search-console - aws-cloudwatch-insights - aws-cloudfront - aws-email - aws-s3-control - aws-s3 - aws-sagemaker - aws-sagemaker-edge - aws-sagemaker-featureStore - bunq - hootsuite - robocorp - sendgrid - google-calendar - google-docs
Get details about a specific operation from an OpenAPI specification. Use this after getting an overview. - openai - OpenAI is a large AI service provider providing state of the art models in various modalities. - github - GitHub is where one hosts their code in a central location, to collaborate with others - socialdata.tools - podscan.fm - Search through podcast transcripts, get alerts - x - Official Twitter/X API - cloudflare - Cloudflare provides content delivery network services, cloud cybersecurity, DDoS mitigation, wide area network services, Domain Name Service, and ICANN-accredited domain registration services - npm-registry - supabase - Create hosted Postgres Databases with API - hackernews - Readonly API for posts, comments, and profiles from news.ycombinator.com - stripe - Create a paywall for your app or invoices - slack - A very common app used for communication at work - vercel - Vercel is a cloud hosting solution for full stack applications - val-town - Host serverless APIs - firecrawl - API for interacting with Firecrawl services to perform web scraping and crawling tasks. - playht - The PlayHT's API API allows developers to Realtime Text to Speech streaming Stream audio bytes from text, Convert long form Text to Speech Generate audio from text, and Voice Cloning Instant Cloning. - serper - The worlds fastest and cheapest google search api - replicate - brandwatch - Watch social media about your brand - jina-reader - Read webpages in markdown, html, or screenshot - upstash-redis - Control a Redis database over API - upstash-qstash - Scheduling and batching API calls - upstash-vector - Control a Vector database over API - digitalocean - apisguru - Public API to find OpenAPIs on https://apis.guru - groq - Cloud AI Provider with multiple transformer LLMs and other modalities, with very fast inference - notion-dbs - Notion Databases API - posthog-capture-api - Posthog is a Product analytics platform allowing companies to track and understand their users - google-analytics4 - The Google Analytics Admin API allows for programmatic access to the Google Analytics 4 (GA4) configuration data and is only compatible with GA4 properties - google-analytics3 - Views and manages your Google Analytics data (GA3) - anthropic-message-api - probo-nl - whatsapp-business - The WhatsApp Business Platform gives medium to large businesses the ability to connect with customers at scale. You can start WhatsApp conversations with your customers in minutes, send them care notifications or purchase updates, offer personalized services, and provide support in the channel that your customers prefer. - shopify - Shopify Admin API - twilio-messaging - huggingface - doppio - multion - browserless - Web browsing API - bol-com-retailer - Dutch shopping platform - statusbrew - Social media planning API for facebook, instagram, twitter, linkedin, google my business, pinterest, youtube, and tiktok. - swagger-validator - Validators for swagger 2.0 and 3.x specifications of OpenAPIs - google-mail - Manage GMail - youtube-data - The YouTube Data API v3 is an API that provides access to YouTube data, such as videos, playlists, and channels. - google-sheets - google-drive - google-secret-manager - flyio - vapi - klippa - uberduck - twilio - saltedge - Bank integrations - google-search-console - aws-cloudwatch-insights - aws-cloudfront - aws-email - aws-s3-control - aws-s3 - aws-sagemaker - aws-sagemaker-edge - aws-sagemaker-featureStore - bunq - hootsuite - robocorp - sendgrid - google-calendar - google-docs
OpenAPI MCP Server
A Model Context Protocol (MCP) server for Claude/Cursor that enables searching and exploring OpenAPI specifications through oapis.org.
- Demo: https://x.com/janwilmake/status/1903497808134496583
- HN Thread: https://news.ycombinator.com/item?id=43447278
- OpenAPISearch: https://github.com/janwilmake/openapisearch
- OAPIS: https://github.com/janwilmake/oapis
The MCP works by applying a 3 step process:
- It figures out the openapi identifier you need
- It requests a summary of that in simple language
- It determines which endpoints you need, and checks out how exactly they work (again, in simple language)
Features
- Get an overview of any OpenAPI specification
- Retrieve details about specific API operations
- Support for both JSON and YAML formats
- Tested with Claude Desktop and Cursor
Installation
For other clients, use MCP URL: https://openapi-mcp.openapisearch.com/mcp
Local testing
First run the server
wrangler dev
Then run the mcp inspector:
npx @modelcontextprotocol/inspector
Alternatives
Related Skills
Browse all skillsMaster API documentation with OpenAPI 3.1, AI-powered tools, and modern developer experience practices. Create interactive docs, generate SDKs, and build comprehensive developer portals. Use PROACTIVELY for API documentation or developer portal creation.
UI design system toolkit for Senior UI Designer including design token generation, component documentation, responsive design calculations, and developer handoff tools. Use for creating design systems, maintaining visual consistency, and facilitating design-dev collaboration.
Guide for building TypeScript CLIs with Bun. Use when creating command-line tools, adding subcommands to existing CLIs, or building developer tooling. Covers argument parsing, subcommand patterns, output formatting, and distribution.
Use when working with the OpenAI API (Responses API) or OpenAI platform features (tools, streaming, Realtime API, auth, models, rate limits, MCP) and you need authoritative, up-to-date documentation (schemas, examples, limits, edge cases). Prefer the OpenAI Developer Documentation MCP server tools when available; otherwise guide the user to enable `openaiDeveloperDocs`.
Use when integrating with Tesla's official Fleet API to read vehicle/energy device data or issue remote commands (e.g. start HVAC preconditioning, wake vehicle, charge controls). Covers onboarding (developer app registration, regions/base URLs), OAuth token flows (third-party + partner tokens, refresh rotation), required domain/public-key hosting, and using Tesla's official vehicle-command/tesla-http-proxy for signed vehicle commands.
Integrate Vercel AI SDK applications with You.com tools (web search, AI agent, content extraction). Use when developer mentions AI SDK, Vercel AI SDK, generateText, streamText, or You.com integration with AI SDK.