Rate Limits
Beta keys share a per-key budget. Burst is allowed; sustained load above the budget is 429’d rather than silently sampled.
Default budget
120 requests per minute and 2 concurrent connections per key. List endpoints count as one request regardless of page size.
Headers
http
X-RateLimit-Limit: 120 X-RateLimit-Remaining: 87 X-RateLimit-Reset: 1726400000
When the budget is exhausted the body includes retry_after in seconds. Clients should back off; retries that ignore it are still counted.
LiveHigher limits for research workloads are available on request. There is no paid tier yet.