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Readme

proxymock

A free command-line tool that automatically creates mocks and tests from watching your app run. proxymock is a backend service emulator that lets you run your app as if it were in a live environment.

What is proxymock?

proxymock allows you to record, visualize, mock, and replay traffic on your local system. It captures your application's interactions with external services and creates realistic mocks that can be used for development and testing without hitting real APIs or databases.

Key Features

Free for Local Development: Complete functionality available at no cost
Record & Replay: Capture real traffic from your application and replay it later
Smart Proxy: Intercepts and mocks outbound requests without code changes
Realistic Mocks: Generate mocks from actual production-like traffic
Multiple Protocols: Support for HTTP, HTTPS, gRPC, and other TCP protocols
MCP Integration: Model Context Protocol support for AI development tools

Use Cases

Develop locally without depending on live backend services
Test applications when external services are unavailable or unreliable
Bypass API rate limits during development
Create consistent test environments
Generate realistic test data from production traffic

Installation

# Run the latest version
npx -y @speedscale/proxymock --help

The binary will be automatically downloaded and cached in ~/.speedscale/ on first run.

Getting Started

For complete setup instructions and tutorials, visit the proxymock documentation.

MCP (Model Context Protocol) Support

proxymock includes an MCP server for integration with AI development tools like Cursor and Claude Desktop. Add the following to your MCP config file and ask your AI coding tool what proxymock can do:

{
  "mcpServers": {
    "proxymock-simulator": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@speedscale/proxymock",
        "mcp"
      ]
    }
  }
}

Support

Join our Slack community. Seriously, come talk to us.