U.S. Forest Service Geospatial Data Discovery (DCAT-US catalog)
The agency's Geospatial Data Discovery site publishes a machine-readable DCAT-US 1.1 / Project Open Data catalog of Forest Service datasets — a ~2 MB JSON document declaring "@type": "dcat:Catalog" and conformsTo the Project Open Data v1.1 schema, with a dataset[] array of dcat:Dataset entries. This is the inventory federal agencies publish under the OPEN Government Data Act. The site is named as an official access route on the agency's own FSGeodata Clearinghouse Map Services page, which is how the Esri-tenant hostname is confirmed as a Forest Service surface rather than a vendor's.