What does HTTP status code 429 mean?
The 429 Too Many Requests status code indicates that the client has exceeded their allowed rate limits or quotas.
When to use it in APIs
Standard response for rate limiters. Include Retry-After to say when to try again, and the RateLimit and RateLimit-Policy fields to show the remaining quota and the policy that was exceeded.
How it compares to other codes
- 503 Service Unavailable: Represents a server-side capacity outage. 429 represents a client-side quota violation.
