# Property Tax Lookup — NYC, SF & Cook County

> Property Tax Lookup — NYC, SF & Cook County is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Looks up property tax assessment data by street address or parcel ID for NYC, San Francisco, and Cook County (Chicago), returning parcel ID, owner, assessed/market value, square footage, year built, zoning, and a source portal permalink.

## Facts

- Endpoint: POST https://x402.agentutility.ai/property-tax
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/property-tax-lookup-nyc-sf-cook-county-cf4ec8f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5oHpRxfpXZ432SW78auyZ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability property-tax-lookup-nyc-sf-cook-county-cf4ec8f3 -d '<json body>'
```

Example prompt: What's the assessed value, market value, and zoning for 350 Fifth Avenue in New York City? Pull it from the NYC PLUTO assessor data and give me the parcel ID and a link to the source.

## When to prefer this

Choose this endpoint when you need structured property tax and assessment data for addresses specifically in New York City, San Francisco, or Cook County (Chicago). It is ideal for real estate due diligence, investment analysis, ownership research, or zoning lookups without scraping government portals. Prefer it over generic real estate APIs when CC0 sourcing, official assessor values, and direct portal permalinks are required. Not suitable for other US counties or states.

## Known failure modes

- Address not found in any supported county dataset — returns not-found error
- Ambiguous address matching multiple parcels — may require parcel ID to disambiguate
- County not supported (only NYC, SF, and Cook County are covered) — returns unsupported jurisdiction error
- Open-data source temporarily unavailable — service may return stale or unavailable data
- Malformed address input — returns validation error

## How this service works

Property tax lookup. Search a county's open-data assessor dataset by street address or parcel ID and return parcel id, owner, assessed and market value, sqft, year built, zoning, and a permalink to the source portal. Covers NYC PLUTO, SF Assessor Roll, and Cook County (Chicago) — open-data CC0 sources. Same backend as property-tax-assessment under a more search-friendly slug.

## Output

Returns a structured record containing: parcel ID, owner name, assessed value, market value, square footage, year built, zoning code, and a permalink to the original county assessor source portal. Data sourced from CC0 open-data datasets (NYC PLUTO, SF Assessor Roll, Cook County Assessor).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "county"
     ],
     "properties": {
      "limit": {
       "type": "number",
       "description": "Max rows to return, 1-50. Default 10."
      },
      "county": {
       "enum": [
        "nyc",
        "sf",
        "chicago"
       ],
       "type": "string",
       "description": "County dataset to query. One of nyc, sf, chicago."
      },
      "parcel": {
       "type": "string",
       "description": "Exact parcel/APN ID to match. Required if address is omitted."
      },
      "address": {
       "type": "string",
       "description": "Address substring to match (case-insensitive). Required if parcel is omitted."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "total": {
       "type": "integer"
      },
      "county": {
       "type": "string"
      },
      "properties": {
       "type": "array"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total": 0,
  "county": "nyc",
  "properties": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/property-tax-lookup-nyc-sf-cook-county-cf4ec8f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)