Use cases

What you can build with hostfunc

One exported main() is enough for most automations. Here are the patterns people reach for most — each with real code you can fork.

Webhook handlers

Give any provider a stable HTTPS endpoint backed by typed TypeScript.

Standard 5-field cron expressions, timezone-aware, unified observability.

Let Claude (or any MCP client) create, run, and compose your functions as tools.

Slash commands, notifications, and chat workflows on a stable endpoint.

Fetch, parse, and transform pages and feeds — on demand or on a schedule.

Typed JSON endpoints with stable URLs — compose them into a backend.