Knowledge
Each source has a page with its publisher, update schedule, coverage, known limits, and request fields. Coverage tells you where a source is available, not which fields a property will return. You can get the same details as JSON at /api/knowledge/data-sources.
Last verified . That is when this list was last rebuilt from the ParcelOps source registry, not when each publisher last refreshed its own data.
ATTOM property detail, county assessment, recorded sale history, and AVM estimates with your own ATTOM API key.
RentCast property records, value estimates, long-term rent estimates, and sale comparables with your own RentCast API key.
