429 Too Many Requests
If an service wants to limit the amount of requests clients make, they can
429 Too Many Requests status code to inform the client that
they’ve exceeded it.
For example, perhaps an API wants to limit users to 100 HTTP requests per hour.
It’s possible to tell a client when they can make requests again with the
Retry-After header, but this is optional.
HTTP/1.1 429 Too Many Requests Content-Type: text/plain Retry-After: 3600 You exceeded the limit. Try again in an hour
- RFC6585, Section 4 - Too Many Requests