Public sampled timestamp poll over the reachable SQLite incident corpus. Provide since or a prior next_cursor. since is inclusive; change-time ties can replay, so upsert by hashId. Walk pages in ascending order with next_cursor until has_more is false. next_since is a polling watermark only on a terminal ascending page with corpus_truncated=false; it is null for nonterminal pages, descending order, and truncated corpora. The upstream fetch is capped at 40 pages of 500 incidents (20,000 rows), read six at a time; corpus_truncated=true marks an incomplete reachable corpus. A truncated corpus is not resumable to completeness through this feed or the similarly capped export. This poll has no delete tombstones or mutation journal and can miss late backdated changes; periodically reconcile against a verified full corpus from the data owner. Responses can be revalidated with If-None-Match. The Worker returns the 200 body as identity JSON; Cloudflare's edge compresses it once per client (gzip or br) when the request's Accept-Encoding allows, so a client that sends no Accept-Encoding receives plain JSON. The examples below are synthetic, derived from the B2003 source test fixture, and are not served readbacks.

Synthetic request sequence (the ETag is calculated from the first synthetic response payload):

GET /data/incidents/delta?since=2026-01-01T00%3A00%3A00Z&limit=2
GET /data/incidents/delta?cursor=MjAyNi0xMC0wMVQwMDowMDowMFp8Yg&limit=2
GET /data/incidents/delta?since=2026-01-01T00%3A00%3A00Z&limit=2
If-None-Match: W/"delta-35f6a8a4ec997f6bab79200855e3cb05e23d75832d4de7dd4d69151f9cc2c1dd"
Accept-Encoding: gzip