API Mock Generator

Describe your API in English. Get a running mock server. Generate mock API servers instantly from OpenAPI specs or natural language descriptions. MCP-enabled for AI coding agents.

Quick Start

npm install
npm start

Related MCP server: Mockloop MCP

MCP Tools

Features

• Zero external API dependencies — all data generation is built-in

• Contextual fake data — names for name fields, emails for email fields, dates for timestamps

• CRUD endpoints — auto-generated list, get, create, update, delete

• Pagination — built-in page/limit support on list endpoints

• Request logging — GET /_logs to inspect all requests

• Error simulation — configurable error rate for resilience testing

• Response delay — simulate slow networks

• TypeScript types — generate interfaces for all resources

• Client SDK — ready-to-use fetch-based API client

Install

npm i @lazymac/api-mock-generator

As MCP Server

{
  "mcpServers": {
    "api-mock-generator": {
      "command": "node",
      "args": ["node_modules/@lazymac/api-mock-generator/src/main.js"]
    }
  }
}

Links

• GitHub

• npm

• All 29 Tools

License

MIT