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Best MCP servers for API development

We found 109 MCP servers for API development in the catalog; these are the 15 that rank highest. The order comes from our rank, which weighs adoption, freshness, documentation and publisher identity. Nobody can pay for a place on this list. Keploy, mcpsmith and MCP GraphQL Enhanced lead it. SmartBear MCP, Octri CLI and Kaiva Bridge are published by the company that makes them. Keploy has the most GitHub stars here (18,728). 15 of the 15 had activity in the last 30 days. Remote servers need no local install; local ones run on your machine and can reach local files. Each entry lists why it made the list and links to its install page.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

Top 15 of 109

  1. 1
    Keploy

    keploy

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

    • Most GitHub stars here (18,728)
    • Remote server, no local install
    • Active in the last 30 days

    ★ 18.7KLast active Oct 24, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

  2. 2
    mcpsmith

    sepehr071

    Curated MCP tools from OpenAPI, websites, apps, Postman, cURL or SQL; your agent designs them.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 16↓ 1.1K/wkLast active Oct 22, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  3. 3
    MCP GraphQL Enhanced

    letoribo

    GraphQL gateway for LLMs.

    • Most weekly downloads here (30.5K)
    • Active in the last 30 days
    • Open source (MIT)

    ★ 6↓ 30.5K/wkLast active Oct 22, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  4. 4
    Apollo MCP Server

    apollographql

    MCP server that exposes GraphQL operations as tools for AI models.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 317Last active Oct 23, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  5. 5
    SmartBear MCP

    smartbear.comOfficial

    MCP server for AI access to SmartBear tools, including BugSnag, Reflect, Swagger, PactFlow, QTM4J.

    • Published by the vendor
    • Runs locally or as a remote server
    • Active in the last 30 days

    ★ 44Last active Oct 23, 2026Local (stdio), Remote (HTTP)Claude Code, VS Code, Codex, Cursor +2

  6. 6
    toolsmelt

    sepehr071

    Curated MCP tools from OpenAPI, websites, apps, Postman, cURL or SQL; your agent designs them.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 16↓ 268/wkLast active Oct 22, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  7. 7
    Swagger MCP

    smartbear.com

    MCP server for AI access to Swagger by SmartBear.

    • Remote server, no local install
    • Active in the last 30 days
    • Open source (MIT)

    ★ 44Last active Oct 23, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

  8. 8
    Surf

    geckovision.tech

    Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.

    • Runs locally or as a remote server
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 22↓ 122/wkLast active Oct 21, 2026Local (stdio), Remote (HTTP)Claude Code, VS Code, Codex, Cursor +2

  9. 9
    CAPI Gateway

    surisoft-io

    Apache Camel API Gateway with REST-to-MCP bridging for LLM agents.

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 10Last active Oct 13, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  10. 10
    Mockzilla MCP

    mockzilla

    Mock OpenAPI specs locally, or log in to deploy hosted mocks on mockzilla.org from your MCP client.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 5↓ 58/wkLast active Oct 9, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  11. 11
    Manifold

    nonchan7720

    MCP gateway aggregating MCP servers and OpenAPI/Swagger REST APIs behind one MCP endpoint

    • Remote server, no local install
    • Active in the last 30 days
    • Open source (MIT)

    ★ 4Last active Oct 23, 2026Remote (HTTP)

  12. 12
    Octri CLI

    octri.devOfficial

    Push OpenAPI specs, build SDKs in ten languages, publish API docs, and triage production SDK errors.

    • Published by the vendor
    • Active in the last 30 days
    • Open source (MIT)

    ★ 3↓ 25/wkLast active Oct 12, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  13. 13
    Mcpolyglot

    ishay60

    Policy-checked, audited agent access to Postgres, MySQL, SQLite, MongoDB and OpenAPI REST APIs.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 1↓ 72/wkLast active Oct 22, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  14. 14
    gov.br APIs MCP

    thalisantunes

    A catalog-driven gateway over Brazilian government APIs, loading OpenAPI specs on demand.

    • Active in the last 30 days
    • Open source (MIT)

    ↓ 146/wkLast active Oct 19, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  15. 15
    Kaiva Bridge

    kaiv.aiOfficial

    Turn any OpenAPI/Swagger spec or REST API docs link into a managed MCP server.

    • Published by the vendor
    • Remote server, no local install
    • Active in the last 30 days

    ★ 1Last active Oct 21, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

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