Show HN: Instant file upload and URL for AI agents

Building upfile.sh because AI agents need a better, cleaner way to upload screenshots and files, in order to get a URL back instantly.

Supports public (permanent CDN), expiring (TTL-based), and private (auth-gated) uploads. --json flag for scripting/agents.

Built on Cloudflare Workers + R2. Currently waitlist, happy to give HN folks early access.

https://upfile.sh