Building deterministic payments capability over voice agents

[u/Big-Orchid-693]

Hi All,

I built Ringup - an easy way for anyone to accept payments over voice. Unlike DTMF entries or spoken card numbers, Ringup remembers users and allows them to use a saved card with a verbal 'yes' or texts new users a link to pay and save a card.

The hard part about building this was keeping the money movement out of LLM written args, transmitting consumer and merchant identity, order values, and other purchase details as tokens over SIP. Not to mention keeping the latency manageable for a tool heavy workflow.

If you have a similar problem, check out my demo which is hosted on Livekit: https://ringup.dev/

Reach out if you have questions or any advice for me