Public ArcGIS MapServer endpoint for Onondaga County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://gisservices.its.ny.gov/arcgis/rest/services/NYS_Tax_Parcels_Public/MapServer/1/query?where=COUNTY_NAME='Onondaga'+AND+UPPER(PRIMARY_OWNER)+LIKE+UPPER('%SMITH%')&outFields=COUNTY_NAME,PRIMARY_OWNER,PARCEL_ADDR,SWIS_SBL_ID&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| COUNTY_NAME | County Name (e.g. Onondaga) | YES |
| PRIMARY_OWNER | Primary Owner Name | YES |
| PARCEL_ADDR | Parcel Address | YES |
| PRINT_KEY | Print Key | YES |
| SWIS_SBL_ID | SWIS-SBL Parcel Identifier | YES |
| MAIL_ADDR | Mailing Address | YES |
| MAIL_CITY | Mailing City | NO |
| TOTAL_AV | Total Assessed Value | NO |
| PROP_CLASS | Property Class Code | NO |
| YR_BLT | Year Built | NO |
Onondaga County (Syracuse, FIPS 36067) is served by the NYS Tax Parcels Public statewide layer — filter with COUNTY_NAME='Onondaga'. 75+ fields including PRIMARY_OWNER, PARCEL_ADDR, SWIS_SBL_ID, PRINT_KEY, MAIL_ADDR, MAIL_CITY, TOTAL_AV, PROP_CLASS, YR_BLT. Owner query confirmed returning real residential parcels (Smith, Gregg S at 2647 Ellsworth Rd). This same statewide endpoint covers all 62 NY counties; see the NYC entry for borough-specific filtering. Note: Monroe County (Rochester, 36055) has its own dedicated hosted service with richer attributes — see ny-monroe entry. The NYS statewide service may not always return Monroe data; use the dedicated Monroe endpoint for that county.
NYS Office of Information Technology Services GIS (statewide layer) — https://gisservices.its.ny.gov/arcgis/rest/services/NYS_Tax_Parcels_Public/MapServer
/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.