MCP Servers

api-mock-generator

Enables instant creation of mock API servers from OpenAPI specs or natural language descriptions, with built-in fake data generation, CRUD endpoints, and configurable delays/errors for testing.

Category

README

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

MCP Tools

Tool	Description
`mock_from_openapi`	Generate mock server from OpenAPI 3.x spec
`mock_from_description`	Generate mock from natural language (e.g., "todo app with users, todos, auth")
`generate_types`	Generate TypeScript interfaces
`generate_client`	Generate fetch-based API client SDK
`mock_config`	Configure delay, error rates, pagination

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

License

MIT

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