Summary
Think of this as a universal adapter that turns any OpenAPI spec into MCP tools your AI assistant can call. Point it at a Swagger URL like Petstore or LinkedIn's API docs, and it dynamically generates tools for every endpoint. Run it headless to proxy an existing REST API, or use the full HAPI server for greenfield projects. The CLI makes it dead simple to serve a spec locally, deploy to Cloudflare Workers, or spin up a Docker container. It handles authentication, CORS, and TLS out of the box. Reach for this when you want Claude to interact with REST APIs without writing custom integration code for each one.
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belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
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Connect your Claude agent to live crypto prices and trading routes via 1inch
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Fastest browser for AI agents to run web automation tasks, always free.
Download Free life-time →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Configuration
HAPI_FQDNdefault: localhostFully Qualified Domain Name for the HAPI server (used in MCP tool URLs)
HAPI_HOMEdefault: /app/.hapiDirectory path for HAPI configuration and specs. Should be mounted as a volume in Docker
PROJECT_NAMEThe name of the project/API (alternative to positional argument)
HAPI_OPENAPIOpenAPI spec URL or path (alternative to --openapi flag)
HAPI_URLBackend API base URL (alternative to --url flag)
HAPI_PORTdefault: 3030Server port (alternative to --port flag) - this is the internal container port
HAPI_HEADLESSdefault: trueEnable headless mode (alternative to --headless flag)
HAPI_MCPdefault: trueEnable MCP mode (alternative to --mcp flag)
HAPI_DEVEnable development mode (alternative to --dev flag)
HAPI_CORSComma-separated allowed CORS origins (alternative to --cors flag)
HAPI_CONFIG_FILESComma-separated configuration files (alternative to --filename flag)
NODE_ENVdefault: productionNode environment (development, production). 'development' enables verbose logging and debugging features.