API Testing MCP

@cocaxcode/api-testing-mcp The most complete MCP server for API testing. Period. 42 MCP tools Zero config Works in any MCP client. It runs locally over stdio via the published package.

People connecting API integration tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-05-02 · ★ 6 · #136 OF 250 MAINTAINED API INTEGRATION · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install API Testing MCP

before you install - you'll need

API_TESTING_DIR

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add cocaxcode-api-testing-mcp -- npx -y @cocaxcode/api-testing-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "cocaxcode-api-testing-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cocaxcode/api-testing-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package @cocaxcode/api-testing-mcp - published under the repo owner's npm scope (@cocaxcode)

registry namespace io.github.cocaxcode is GitHub-verified and matches the repo owner

03 · What API Testing MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 4 documented tools across inspect, assert, flow, including inspect_last_response, assert, flow_run, mock.

Capability map

Tools grouped from the project's README - what API Testing MCP lets an agent do.

Inspect

1 tool - e.g. 1

inspect_last_response

Assert

1 tool - e.g. 1

assert

Flow

1 tool - e.g. 1

flow_run

Mock

1 tool - e.g. 1

mock

04 · Who maintains API Testing MCP

api-testing-mcp is maintained by cocaxcode. We track 5 MCP servers from cocaxcode - 5 actively maintained, 10 combined GitHub stars, oldest repo from Mar 2026.

05 · Facts

repository: github.com/cocaxcode/api-testing-mcp
category: API integration - ranked #136 of 250 actively-maintained API integration servers as of 2026-08-25.
registry: io.github.cocaxcode/api-testing-mcp (active, first published 2026-03-16 · 2 versions)
packages: npm:@cocaxcode/api-testing-mcp

06 · API Testing MCP FAQ

Is API Testing MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-05-02. We re-verify nightly.

What can API Testing MCP do?

An agent gets 4 documented tools across inspect, assert, flow, including inspect_last_response, assert, flow_run, mock.

How do I install API Testing MCP?

Run `npx -y @cocaxcode/api-testing-mcp`. The README documents one environment variable (API_TESTING_DIR) to set first. You can also paste the ready-made client config above.

Does API Testing MCP run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to API Testing MCP

Alternatives to API Testing MCP

Maintained API integration servers if API Testing MCP isn't the fit.

More API integration MCP servers · Shopee · Braintree · Pix Bcb · Portkey Admin MCP · Dataverse

More TypeScript MCP servers · Claude Code Explorer MCP · Email MCP · Mat · Schelling Protocol · see all