Rate limits
Request limiting guidelines
Requests are limited per API key and per client IP address. Authenticated responses report the key's quota for the current window:
| Header | Meaning |
|---|---|
X-RateLimit-Limit | Requests allowed per window. |
X-RateLimit-Remaining | Requests left in the current window. |
Retry-After | On 429 only: seconds until you may retry. |
When you receive 429, wait the number of seconds in Retry-After before
retrying.
Repeated requests with a missing or invalid API key from one IP address are
refused with 429 for the rest of the window, valid keys included.