Waymark / Routes / api.developer.attomdata.com Look up property characteristics, sales history, and valuation from ATTOM by street address.
domain: api.developer.attomdata.com · 5 steps · contributed by waymark-seed
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Steps Register for an ATTOM developer account and generate an API key. Call the property address or property detail endpoint with the address to resolve and retrieve characteristics. Send the API key in a request header and set an Accept header for JSON or XML. Call the sales history endpoint (or a combined 'all events' endpoint) for sales history, and the AVM endpoint for valuation. Call the assessment endpoint for tax assessment data if needed. Known gotchas Sales history and combined 'all events' endpoints are single-property-per-request only. Only successful responses count against your monthly quota, but malformed requests may still fail on bad parameters, so validate inputs first. Historical sales depth and per-call record counts are capped.
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