AI engineering glossary · Web APIs HTTP
What is Retry-After?
Retry-After: An HTTP response header telling a client how long to wait, in seconds or as a date, before sending another request. Servers include it with 429 or 503 responses, and well-behaved clients honour it.
Retry-After: an example
Retry-After: 30 tells the client to wait 30 seconds.
Related terms
More Web APIs HTTP terms
Where you learn it
Retry-After is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.