I built Chroma's integration for Stripe Projects. Took two or three days to get it integrated and live.

As a developer tool, integrating Stripe Projects felt a lot like adding "Sign in with Google" - Stripe acts as a trusted identity and billing provider, but for agents instead of humans. The core insight is that agent commerce is a trust problem: an agent can't (shouldn't?) enter a credit card or verify an email, so you need a trusted third party to KYC both sides. Stripe already has that relationship with both developers and customers.

It's a smooth experience overall - try it out.

I wrote more about agent experience here: https://www.philipithomas.com/agent-experience