Public ArcGIS MapServer endpoint for Collin County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
GIS_DBO_AD_Entity_file_as_nameOwner NameGIS_DBO_AD_Entity_situs_displaySitus AddressGIS_DBO_Parcel_PROP_IDProperty ID (key)GIS_DBO_Parcel_GEO_IDGeographic IDcurl -s 'https://gismaps.cityofallen.org/arcgis/rest/services/ReferenceData/Collin_County_Appraisal_District_Parcels/MapServer/1/query?where=UPPER(GIS_DBO_AD_Entity_file_as_name)%20LIKE%20UPPER('%25SMITH%25')&outFields=GIS_DBO_Parcel_PROP_ID,GIS_DBO_AD_Entity_file_as_name,GIS_DBO_AD_Entity_situs_display&returnGeometry=false&f=json&resultRecordCount=10'https://gismaps.cityofallen.org/arcgis/rest/services/ReferenceData/Collin_County_Appraisal_District_Parcels/MapServer/1/query?where=UPPER(GIS_DBO_AD_Entity_file_as_name) LIKE UPPER('%SMITH%')&outFields=GIS_DBO_Parcel_PROP_ID,GIS_DBO_AD_Entity_file_as_name,GIS_DBO_AD_Entity_situs_display&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| GIS_DBO_AD_Entity_file_as_name | Owner Name | YES |
| GIS_DBO_AD_Entity_situs_display | Situs Address | YES |
| GIS_DBO_Parcel_PROP_ID | Property ID (key) | YES |
| GIS_DBO_Parcel_GEO_ID | Geographic ID | YES |
Collin County, Texas (Plano / Frisco / McKinney, pop. ~1.1M — among the fastest-growing US counties) publishes Collin Central Appraisal District (CCAD) parcels through a City of Allen ArcGIS MapServer. Owner search uses the joined field GIS_DBO_AD_Entity_file_as_name; the situs (site) address is GIS_DBO_AD_Entity_situs_display; the parcel key is GIS_DBO_Parcel_PROP_ID. The GIS_DBO_ table-join prefixes must be used verbatim in WHERE clauses. Owner LIKE query confirmed live 2026-05-30. Texas Tax Code §25.025 lets protected persons (peace officers, judges, family-violence victims) suppress owner/address records.
Collin Central Appraisal District (CCAD), hosted via City of Allen GIS — https://www.collincad.org/
Collin County's Collin County Appraisal District Parcels layer exposes owner names (Owner Name) and address fields (Situs Address). Use it for owner-name lookups and address-based parcel searches. All 4 listed fields accept queries. Served as an ArcGIS MapServer layer, which supports query operations but not write operations; last verified 2026-05-30.
/query?where=…&outFields=*&f=jsonto the URL. The sample query above is a working example you can paste into a browser tab to see the raw JSON response.Counties publish parcel data through their own ArcGIS Server installations, each with its own schema. One county uses APN, another uses PIN, a third uses PARCEL_ID. Some expose owner names; others keep them on a separate assessor's portal. The searchable fields list above reflects what Collin County actually publishes — not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
Many county servers allow public reads but block browser cross-origin requests. The UrbanKit parcel lookup tool fetches directly from your browser; if it works there, the layer is technically public. For your own integration, you may need a same-origin proxy or server-side fetch.
Possibly — counties move services without warning. We re-verify entries weekly and flag stale ones. If you're seeing a fresh 404, please let us know and we'll update the listing.
Most are. Public ArcGIS layers don't typically rate-limit individual reads, but heavy programmatic use can trigger throttling at the host level. Be respectful — query what you need.