omcp

Point omcp at an OpenAPI spec and get a fully working MCP server. One binary, no runtime, instant startup.

Install

brew tap jruttan1/omcp
brew install omcp

Usage

1. Run setup

omcp init

You'll be prompted for:

• API spec file — path to your OpenAPI YAML file
• Base URL — where your server is running (https://api.stripe.com, http://localhost:8080, etc.)
• API key — optional, used as a Bearer token if your API requires auth

Then pick which endpoints to expose as tools. Your config is saved to ~/.omcp/config.json.

2. Add omcp to your MCP client

{
  "mcpServers": {
    "myapi": {
      "command": "omcp"
    }
  }
}

When your client starts, it spawns omcp which reads the saved config and registers your selected endpoints as tools, ready to call.

Security

Your API key is stored locally in ~/.omcp/config.json with owner-only permissions. omcp runs entirely on your machine, no telemetry, no external calls, nothing leaves your device except the API requests you choose to make.

What it supports

• Local servers (http://localhost:8080) or live APIs (https://api.stripe.com)
• Bearer token / API key auth
• Path params, query params, and request bodies
• Any MCP-compatible client: Claude Desktop, Cursor, Cline, Zed, and more

Contributing

Issues and PRs welcome.