Creating a network object through the city's FDM API returns HTTP 4…

Question

Creating a network object through the city's FDM API returns HTTP 400 (or 422) because the payload is malformed. What is the correct consumer control flow?

Accepted Answer

Halt that request, surface the validation problem, and fix the body before any new attempt. — If the form is filled out wrong, mailing it again unchanged will bounce the same way. Stop, show the validation error, fix the payload—do not pretend it is a timeout.

Answer

Apply the same exponential backoff used for read timeouts and keep posting the identical body.

Answer

Treat 400 as a soft 429 and sleep on Retry-After even when the header is absent.

Answer

Convert the call to GET and ignore the validation failure entirely.

Creating a network object through the city's FDM API returns HTTP 400 (or 422) because the payload is malformed. What is the correct consumer control flow?

Short Explanation

Full Explanation