Public ArcGIS FeatureServer endpoint for Ada County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://services2.arcgis.com/dgGjZc6xAH5m5JyP/arcgis/rest/services/Parcels/FeatureServer/5/query?where=UPPER(ADDRESS)+LIKE+UPPER('%MAIN+ST%')&outFields=PARCEL,ADDRESS,CITY_STATE,TOTALVALUE,ZONING&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| PARCEL | Parcel Number | YES |
| ADDRESS | Property Address | YES |
| PROPADDNUM | Address Number | YES |
| PROPSTNM | Street Name | YES |
| CITY_STATE | City and State | NO |
| TOTALVALUE | Total Assessed Value | NO |
| ZONING | Zoning Code | NO |
| ACRES | Acreage | NO |
| HOMEEXEMPT | Homeowner Exemption | NO |
| PROPYEAR | Property Year | NO |
| SUBNM | Subdivision Name | NO |
| CODEAREA | Tax Code Area | NO |
28 fields confirmed. This is the Ada County Assessor parcel layer backing the county's GIS parcel viewer. Key fields: PARCEL (parcel number), ADDRESS (full formatted address), property address components (PROPADDNUM, PROPPREDIR, PROPSTNM, PROPSTTYPE, PROPPOST, PROPUNIT, PROPUNUM), CITY_STATE, legal description lines (LEGAL1-LEGAL5), ZONING, BANKCODE, CODEAREA (tax code area), TOTALVALUE (total assessed value), HOMEEXEMPT (homeowner exemption amount), ACRES, SECTION, SUBNM (subdivision name). NOTE: Owner name is NOT available on this public REST layer. Ada County keeps ownership data in a separate non-public table. For owner lookup, use the Ada County Assessor property search portal at assessor.adacounty.id.gov. Ada County, ID is the Boise metropolitan area (FIPS 16001); Boise is the state capital of Idaho.
Ada County Assessor's Office GIS — https://www.adacounty.id.gov/assessor/gis/
/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.