# Harris County Property Lookup by HCAD Account Number

> Harris County Property Lookup by HCAD Account Number is a paid API for AI agents from x402datasource.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Retrieves detailed property appraisal data for a Harris County, TX property using its HCAD account number, including owner, address, valuation, and exemption info.

## Facts

- Endpoint: GET https://x402datasource.com/api/v1/property/tx/harris/:propertyId
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402datasource-com-7cd94067
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b8bNEY4cpYFPQTINMb4eY

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 x402datasource-com-7cd94067
```

Example prompt: Can you pull up the HCAD property record for account number 0571430000001 in Harris County — I need the owner name, address, appraised value, and any tax exemptions on file.

## When to prefer this

Use this endpoint when you have a specific HCAD account number and need structured property data for a Harris County, TX parcel. Prefer this over the address-search sibling endpoint when the HCAD ID is already known, as it is a direct and unambiguous lookup. Choose this for automating property research, due diligence, or data enrichment pipelines involving Harris County real estate.

## Known failure modes

- Invalid or unknown HCAD account number returns empty or null fields
- Property exists but has no valuation data yet (nulls in values/address/property fields, as shown in example)
- Malformed propertyId format causes a 4xx error
- Payment failure or insufficient USDC balance results in 402 Payment Required
- Rate limiting or service unavailability returns 5xx error

## How this service works

Look up a Harris County property by its HCAD account number.

## Output

Returns a JSON object with the property owner name, HCAD account number (geo_id), valuation breakdown (land, market, assessed, appraised, improvement values and homestead cap savings), full address details (street, city, zip), physical property characteristics (land sqft/acres, year built, improvement sqft, price per sqft), tax year of the data, and exemption flags (homestead, over-65, disabled person, disabled veteran) plus the legal description.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "propertyId": "0571430000001"
  }
 }
}
```

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "propertyId"
     ],
     "properties": {
      "propertyId": {
       "type": "string",
       "description": "HCAD account number (e.g. \"0571430000001\"). Passed as a URL path parameter."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "owner": {
       "type": "string",
       "description": "Property owner name."
      },
      "geo_id": {
       "type": "string",
       "description": "HCAD account number."
      },
      "values": {
       "type": "object",
       "description": "Property valuation details."
      },
      "address": {
       "type": "object",
       "description": "Property address details."
      },
      "property": {
       "type": "object",
       "description": "Physical property details."
      },
      "data_year": {
       "type": "integer",
       "description": "Tax year of the data."
      },
      "exemptions": {
       "type": "object",
       "description": "Tax exemption flags."
      },
      "legal_description": {
       "type": "string",
       "description": "Legal description of the property."
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402datasource-com-7cd94067/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402datasource.com](https://www.zero.xyz/host/x402datasource.com/llms.txt)