Limits

Request rate, response size and paging.

LimitValueWhen exceeded
Requests per API key240 per minute429 rate_limited, with Retry-After
Requests without a key30 per minute per IP address429 rate_limited, with Retry-After and where to get a key
Points per values request100,000 at the series' resolution: 11 years at PT1H, 1,041 days at PT15M, under 28 hours at PT1S400 bad_request (param: end); split the window
Series per many-series call2,000 (5 without a key); a page holds whole series up to 200,000 points400 bad_request over 2,000; series past a full page come with next
Time range for a series without a regular step (e.g. outages published as change-points, installed capacity)366 days, since the point count cannot be computed400 bad_request (param: end)
Search results per page100 by default, limit up to 1,000the rest pages with next
Snapshots per page100 by default, max_snapshots up to 1,000the rest pages with next

All times are UTC, in ISO 8601. How to stay inside these limits with few requests: Calling rules.