Backend readiness challenge

Make six production calls.

See where your backend judgment is strongest, then get one focused learning path. No account is required and individual answers are not stored.

Question 1 of 6 About 6 minutes · private by default
A client creates an invoice through POST /invoices. The write succeeds and the API can identify the new resource immediately. Which response best communicates the outcome?

A client creates an invoice through POST /invoices. The write succeeds and the API can identify the new resource immediately. Which response best communicates the outcome?