Authentication failures
Repeated authentication failures (missing, invalid or expired keys) are temporarily blocked. While blocked, requests return429 with a Retry-After header indicating how long to wait
before retrying.
Request errors
Repeated client errors (4xx) on POST, PUT and PATCH requests are also temporarily
blocked. Successful requests, rate-limit responses (429) and authorization errors
(401 / 403) do not count toward this block.
When you receive a
429, respect the Retry-After header before retrying, and fix the
underlying error (bad key, malformed payload) rather than retrying the same failing request.