I would really appreciate any feedback! It works pretty well, but I still have to make it more robust. Also, I have no idea yet how to best monetize it. If I get some traction/encouraging feedback, I'll add feature tests (e.g., can you still make a reservation, can the agent deal with noise, etc.).
The UX is heavily inspired by https://uptimerobot.com/ and https://supabase.com/
Here is some behind the scenes on I coded that in only one week: https://www.callgeist.com/about
(tech: OpenAI-Realtime-API, Supabase, Next.js 15, Twilio, React, TypeScript, shadcn)
PS: Part of this project is to showcase my work, as I'm currently looking for new opportunities (please see my HN profile.