API endpoints that materialize on demand

You hit /api/analytics/dashboard?metric=churn&segment=enterprise. The endpoint doesn't exist. A hoody-exec wildcard handler catches the 404, looks at the URL and your data schema, and asks an LLM to generate the handler. The handler runs in a sandboxed exec instance, returns the response, and gets cached as a real endpoint for next time.

The endpoint didn't exist. Now it does. The first call took a second longer; every call after runs at native speed.

This is the long tail of internal APIs you keep meaning to build: the admin tool you use twice a year, the integration script you write and forget, the endpoint your AI agent needs that nobody anticipated. You stop designing APIs in advance. You let them emerge from the URLs you actually call.

Documentation becomes the access log.