Travel Advisories API
The State Department publishes travel advisory levels (Level 1-4) for every country. The machine-readable surface is an ArcGIS Online Feature Service on the bureau's own Esri tenant (R6wlO6UHmSzqm9Vs): one polygon per country carrying LEVEL_ (1-4), the ISO 3166-1 alpha-3 code, the advisory date and the URL of the human advisory page. Anonymous, no key, capabilities Query, maxRecordCount 2000. A dated RSS feed of the same advisories is published at travel.state.gov/_res/rss/TAsTWs.xml (216 items observed 2026-09-05) and is the only change signal the bureau offers. baseURL was https://travel.state.gov, the website root, which named no API host; corrected 2026-09-05 to the Feature Service that actually answers.