Public ArcGIS FeatureServer endpoint for Alameda County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://services5.arcgis.com/ROBnTHSNjoZ2Wm1P/arcgis/rest/services/Parcels/FeatureServer/0/query?where=SitusCity='OAKLAND'&outFields=APN,SitusStreetNumber,SitusStreetName,SitusCity,SitusZip,Land,Imps,TotalNetValue&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| APN | Assessor Parcel Number | YES |
| SitusStreetNumber | Situs Street Number | NO |
| SitusStreetName | Situs Street Name | YES |
| SitusUnit | Situs Unit | NO |
| SitusCity | Situs City | YES |
| SitusZip | Situs ZIP | NO |
| SitusAddress | Situs Address (combined) | YES |
| Land | Land Value | NO |
| Imps | Improvements Value | NO |
| TotalNetValue | Total Net Value | NO |
| UseCode | Use Code | NO |
| TRAPrimary | Tax Rate Area (Primary) | NO |
| LatestDocumentDate | Latest Document Date | NO |
42 fields confirmed including APN, APN_SORT, BOOK, PAGE, PARCEL, SUB_PARCEL, CLCA_CATEGORY, CENTROID_X, CENTROID_Y, SortParcel, PrintParcel, TRAPrimary, TRASecondary, SitusStreetNumber, SitusStreetName, SitusUnit, SitusCity, SitusZip, SitusZip_4, Land, Imps, CLCALand, CLCAImps, HOEX, OTEX, TotalNetValue, LatestDocument_Prefix, LatestDocumentSeries, LatestDocumentDate, MailingAddressStreet, MailingAddressUnit, MailingAddressCityState, MailingAddressZip, MailingAddressZip_4, UseCode, EconUnit, EconomicUnit, SitusAddress, MailingAddress, Shape__Area, Shape__Length. Live query confirmed: SitusCity='OAKLAND' returns real parcel data (APN='15-1338-24', Land=458816). NOTE: Owner name is NOT on this public layer — CA Gov Code 7928.205 applies. Mailing address (owner's mailing) is available via MailingAddress/MailingAddressStreet. APN format uses dashes (e.g. '15-1338-24'). ArcGIS item ID: 2b026350b5dd40b18ed7a321fdcdba81. Hosted on ArcGIS Online (services5.arcgis.com/ROBnTHSNjoZ2Wm1P). Capabilities: Query, Extract. maxRecordCount=2000.
Alameda County GIS / Assessor's Office — https://data.acgov.org/
/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.