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Best MCP servers for API testing

We found 15 MCP servers for API testing 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, Postman MCP Server and mockd lead it. Postman MCP Server, mockd and Mockserver are published by the company that makes them. Keploy has the most GitHub stars here (18,728). 6 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 15

  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
    Postman MCP Server

    postman.comOfficial

    Give your AI agents trusted access to the full Postman platform.

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

    ★ 325Last active Oct 16, 2026Local (stdio), Remote (HTTP)Claude Code, VS Code, Codex, Claude Desktop +2

  3. 3
    mockd

    mockd.ioOfficial

    Multi-protocol API mock server: HTTP, GraphQL, gRPC, WebSocket, MQTT, SSE, SOAP.

    • Published by the vendor
    • Open source (Apache-2.0)

    ★ 151Last active Jun 21, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  4. 4
    Mockserver

    mock-server.comOfficial

    Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency.

    • Published by the vendor
    • 5K GitHub stars
    • Remote server, no local install

    ★ 5KLast active Oct 24, 2026Remote (HTTP)

  5. 5
    Loadster

    loadster.comOfficial

    Load testing and synthetic monitoring platform: test with Playwright, Browser Bot, or Protocol Bots.

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

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

  6. 6
    Octoperf

    OctoPerf

    Drive OctoPerf load testing from any AI agent: import, edit, validate, run scenarios, read metrics.

    • Remote server, no local install
    • Active in the last 30 days
    • Open source (Apache-2.0)

    Last active Sep 26, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

  7. 7
    Postman

    mcparmory.com

    Create, organize, and manage API collections, specifications, and team workspaces

    • Open source (MIT)

    ★ 32↓ 153/wkLast active May 12, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  8. 8
    Mock Server AI MCP

    CSOAI-ORG

    Mock Server Ai MCP Server by MEOK AI Labs

    • Open source (MIT)

    ↓ 49/wkLast active Sep 4, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  9. 9
    API Mock Server

    lazymac2x

    Cloudflare Workers MCP server: api-mock-server

    • Remote server, no local install

    Last active May 16, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

  10. 10
    API Testing MCP

    cocaxcode

    MCP server for API testing.

    • Most weekly downloads here (169)
    • Open source (MIT)

    ★ 13↓ 169/wkLast active May 2, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  11. 11
    Httpstatus

    httpstatus.comOfficial

    AI-callable tools for API mocking, testing, monitoring, security, and automation.

    • Published by the vendor
    • Remote server, no local install

    Last active Apr 11, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

  12. 12
    API Tester

    ryudi84

    MCP server for API testing: HTTP requests, cURL generation, health checks.

    ★ 1Last active Feb 25, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  13. 13
    K6 MCP

    mrfentmen

    Query a running k6: runtime status and metric list.

    • Active in the last 30 days

    Last active Oct 17, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  14. 14
    OpenAPI Navigator

    mgaruccio

    Navigate and query OpenAPI specs with fuzzy search, pagination, and API testing

    ↓ 26/wkLast active Nov 15, 2025Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  15. 15
    Postman Echo MCP

    mrfentmen

    HTTP request echo from Postman Echo.

    Last active Sep 21, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

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