429 Too Many Requests
If an service wants to limit the amount of requests clients make, they can
use the 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.
Example
HTTP/1.1 429 Too Many Requests
Content-Type text/plain
Retry-After: 3600
You exceeded the limit. Try again in an hour
References
- RFC6585, Section 4 - Too Many Requests
Also see:
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