Reg Watch Changes API
reg-watch-changes: Incremental feed of US Federal Register rules, proposed rules, and notices published since a date you supply. Built for scheduled polling: pass since=YYYY-MM-DD and get only documents you have not seen, each with its document number, agency, type, date, and direct link, plus nextSince for your next poll. Dedupe on documentNumber. Fails closed if the source is unreachable, so an empty feed always means no new rules. Query: topic (required), since (optional).
Call card
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The slug below is exactly what invoke accepts. Addendpoint (a route_cards[].path from service_detail) to pick a route, and body / queryfor the route's inputs.
Reliability
Daily probe success ratio, last 30 days. Last probed 2026-08-26.
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Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.