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Stripe checkout 422 after agent-generated patch

A payment request started failing with 422. The replay showed a missing idempotency header after a refactor.

Scenario

Use this pack when checkout works locally, then fails in staging after an AI-assisted change.

What this pack includes

  • A reproducible cURL command for the failing request
  • The likely root cause summary
  • A related Stripe mock template for isolating the frontend
  • Suggested replay flow after the fix

Use this pack

  1. Install APXY and start the proxy.
  2. Reproduce the failing request or replay it with the included cURL command.
  3. Use APXY to inspect headers and compare the failing request against a successful one.
  4. Mock the endpoint if you need to unblock frontend work while you patch the bug.

Install APXY

curl -fsSL https://apxy.dev/install.sh | bashInstall Free

Repro command

curl -X POST https://api.stripe.test/checkout -H 'Authorization: Bearer sk_test' -d '{"amount":4900}'