Sitemap index manifest
O(1) manifest of every dynamic sitemap family with its index path, index path mode, eligible URL count, derived page count, latest timestamp, change frequency, and priority. Front-end sitemap.xml consumer metadata; not an enrichment read or write surface.
Response headers
X-RateLimit-Limit
Requests allowed per client IP in the current rate-limit window.
X-RateLimit-Remaining
Requests left before the tightest applicable rate-limit bucket rejects.
X-RateLimit-Reset
Seconds until the exhausted rate-limit bucket admits another request; 0 when none is exhausted.
Response
OK
families
Errors
400
Bad Request Error
406
Not Acceptable Error
422
Unprocessable Entity Error
429
Too Many Requests Error
500
Internal Server Error
503
Service Unavailable Error