Nationwide federal layers are queried directly where practical. State and local APIs are discovered dynamically from public geospatial catalogues for the state containing your site. No claim is made that every discovered service is authoritative or suitable for design — source provenance stays visible.
Not every service below is fired automatically on every search. Some are direct map layers, some are APIs used for reports/analysis, and some are catalogue families for the next connector. Keeping those distinctions visible avoids pretending that a source is live when it is not.