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Best MCP Servers for OpenAPI (2026)

The best MCP servers for OpenAPI and Swagger — turn any REST API with an OpenAPI spec into MCP tools an AI agent can call, without hand-writing an integration.

Top 10 · ranked by installs, upvotes, stars and views · refreshed hourly

  1. Openapi MCP Server logo

    #1 Openapi MCP Server

    snaggle-ai

    Why it’s hereMost popular in this category on AllMCPs

    Connect any HTTP/REST API server using an Open API spec (v3)

    Upvotes: 1Installs: 0GitHub stars: 905
    Install
  2. BulkTranscripts YouTube logo

    #2 BulkTranscripts YouTube

    Official

    Why it’s hereOfficial server

    Hosted remote MCP server (https://bulktranscripts.co/mcp) for YouTube. Tools: get_transcript, get_transcripts (batch of 20), search_youtube (videos/channels/playlists), search_channel, get_channel_videos (up to 1,000), get_playlist_videos, get_latest_videos (free RSS). Clean paragraphed transcripts, any caption language, TikTok videos too. No signup: free tier per IP, optional one-time credit packs; license key = Bearer API key. Works with Claude, Cursor, ChatGPT, VS Code, Codex. REST API + OpenAPI at /docs.

    Upvotes: 2Installs: 3GitHub stars: —
    Install
  3. Keploy logo

    #3 Keploy

    Why it’s hereCommunity pick

    End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.

    Upvotes: 0Installs: 0GitHub stars: 19k
    Install
  4. Asc MCP logo

    #4 Asc MCP

    Why it’s hereCommunity pick

    App Store Connect + StoreKit 2 from any AI client. 982 tools from Apple's OpenAPI spec.

    Upvotes: 0Installs: 0GitHub stars: 54
    Install
  6. MCP Openapi logo

    #6 MCP Openapi

    ReAPI-com

    Why it’s hereCommunity pick

    MCP server that lets LLMs know everything about your OpenAPI specifications to discover, explain and generate code/mock data

    Upvotes: 0Installs: 0GitHub stars: 90
    Install
  7. Anythingmcp logo

    #7 Anythingmcp

    HelpCode-ai

    Why it’s hereCommunity pick

    Self-hosted source-available MCP gateway and API-to-MCP bridge. Converts REST, SOAP/WSDL, GraphQL, and SQL/NoSQL databases (PostgreSQL, MySQL, MariaDB, MSSQL, Oracle, MongoDB, SQLite) into MCP tools — no SDK, no code. Imports OpenAPI / Postman / WSDL / GraphQL specs; bridges multiple MCP servers behind one endpoint. Ships with 29 pre-built adapters (DHL, DATEV, Weclapp, Personio, Handelsregister, Shopware 6, VIES, OpenPLZ, Bundesbank, etc.). OAuth2 (PKCE + Client Credentials), Bearer, API Key, WS-Security, TLS certs. AES-256-GCM credential encryption, full audit log, per-user MCP API keys, tool-level RBAC.

    Upvotes: 0Installs: 0GitHub stars: 771
    Install
  8. API Testing MCP logo

    #8 API Testing MCP

    cocaxcode

    Why it’s hereCommunity pick

    The most complete API testing MCP — Postman inside your AI assistant. Per-project environment groups with {{variable}} interpolation, saved collections, multi-step flows with response extraction, assertions, load testing, and OpenAPI mock generation. 42 tools, zero cloud account needed.

    Upvotes: 0Installs: 0GitHub stars: 13
    Install
  9. MCP Link logo

    #9 MCP Link

    automation-ai-labs

    Why it’s hereCommunity pick

    Seamlessly Integrate Any API with AI Agents (with OpenAPI Schema)

    Upvotes: 0Installs: 0GitHub stars: 625
    Install
  10. Contradiction MCP logo

    #10 Contradiction MCP

    Daksh-create349

    Why it’s hereCommunity pick

    Detect contradictions and architectural drift in Kubernetes manifests, READMEs, OpenAPI specs and Word docs, with deterministic scoring and resolution advice.

    Upvotes: 0Installs: 0GitHub stars: 7
    Install

Which OpenAPI MCP server should you use?

When choosing a Model Context Protocol server for OpenAPI, select verified or official listings if you need strict API security guarantees. For rapid local dev testing with Claude or Cursor, community-maintained tools offer zero-setup configuration blocks ready to copy-paste.

Frequently asked questions about OpenAPI MCP servers

How do I turn an OpenAPI spec into an MCP server?

Several servers on this page take an OpenAPI/Swagger document and expose each operation as an MCP tool automatically. Point one at your spec URL or file and it generates the tools for you.

What is the best OpenAPI-to-MCP server?

This page ranks OpenAPI/Swagger MCP servers by real usage across the AllMCPs directory so you can start with a maintained generator.

Do these handle authentication to the API?

Most let you pass API keys or bearer tokens through configuration so the generated tools call your API authenticated. Check each listing for the auth methods it supports.