Public ArcGIS MapServer endpoint for Harris County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://www.gis.hctx.net/arcgis/rest/services/HCAD/Parcels/MapServer/0/query?where=UPPER(owner_name_1) LIKE UPPER('%SMITH%')&outFields=HCAD_NUM,owner_name_1,site_str_num,site_str_name,site_city&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| HCAD_NUM | HCAD Parcel Number | YES |
| acct_num | Account Number | YES |
| owner_name_1 | Owner Name (Primary) | YES |
| owner_name_2 | Owner Name 2 | YES |
| site_str_num | Site Street Number | YES |
| site_str_name | Site Street Name | YES |
| site_city | Site City | YES |
| site_zip | Site ZIP | YES |
| mail_addr_1 | Mailing Address | YES |
62 fields confirmed via live endpoint. Owner name search returns real results via UPPER() LIKE on owner_name_1. Up to 3 owner slots (owner_name_1/2/3) with corresponding ownership percentages. Also exposes land_value, bld_value, total_appraised_val, land_use, new_owner_date. Max record count = 1000 per query. The HCAD GIS server also hosts HCAD_MUD (Municipal Utility Districts) in a sibling service.
Harris County Appraisal District (HCAD) GIS Division — https://geo-harriscounty.opendata.arcgis.com/
/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 this 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.