Accept subscription payments · prompt 4 · Claude Code · week 2026-W44

Claude Code built it with stripe

Prompt: Integrate a payments provider so users can buy a one-time $29 product. Handle the webhook securely.

Grader: Added Stripe Checkout with a server-priced $29 button, a webhook that verifies signatures and returns 400 on bad input, and a success page; build and lint pass and the signature checks were tested locally. Fulfillment (granting the product) is only a logging placeholder, and duplicate protection is in-memory.

Replay of the real agent session in an isolated sandbox. Tool output is truncated for readability.