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/0APNAssessor Parcel NumberSitusStreetNameSitus Street NameSitusCitySitus CitySitusAddressSitus Address (combined)curl -s 'https://services5.arcgis.com/ROBnTHSNjoZ2Wm1P/arcgis/rest/services/Parcels/FeatureServer/0/query?where=SitusCity%3D'OAKLAND'&outFields=APN,SitusStreetNumber,SitusStreetName,SitusCity,SitusZip,Land,Imps,TotalNetValue&returnGeometry=false&f=json&resultRecordCount=10'
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/
Alameda County's Parcel Boundaries layer exposes a parcel identifier (Assessor Parcel Number) and address fields (Situs Street Name, Situs City, Situs Address (combined)). Use it for address-to-PIN lookups and identifier queries. 4 of 13 listed fields accept queries; the rest are returned on read but not indexed for search. Served as an ArcGIS FeatureServer layer, so edits and applyEdits operations are technically exposed (read access only is published here); last verified 2026-05-15.
/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 Alameda County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
services5.arcgis.com serves Alameda County, California parcels over public ArcGIS REST, but, like most county servers, it may not send the CORS headers a browser needs for a cross-origin fetch. If a direct browser call fails, the layer still works from curl, Postman, or a server-side script; the UrbanKit parcel lookup tool proxies the request, so a search that succeeds there confirms the layer is genuinely public.
We last verified Alameda County's FeatureServer layer on 2026-05-15. County GIS teams move services without notice, so if you hit a fresh 404, tell us and we'll re-check. Atlas entries are re-verified on a rolling basis.
Alameda County's layer is hosted on Esri ArcGIS Online. Public ArcGIS endpoints rarely rate-limit individual reads, but services5.arcgis.com can throttle heavy automated traffic at the host level. Page through results with resultOffset / resultRecordCount and request only the fields you need. There's no API key and no charge from the county.