# Land Parcel Observations — Duplicate Key Report + Category Frequencies

> Land Parcel Observations — Duplicate Key Report + Category Frequencies is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-02).

Runs two analytical reports on land parcel observation data: a duplicate key detection report and category frequency counts for up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-weather-14-057?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/land-parcel-observations-duplicate-key-report-category-frequencies-e5a7b26b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TlMjpkX48gKQBwsP2SNez

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 land-parcel-observations-duplicate-key-report-category-frequencies-e5a7b26b -d '<json body>'
```

Example prompt: Check my land parcel observation records for duplicate row IDs and give me a frequency count of each station group — here are 4 rows: row-1 on 2026-10-01 with area 10 m2 and perimeter 1 m in group-a, row-2 on 2026-10-02 with area 20 m2 and perimeter 2 m in group-b, row-3 on 2026-10-03 with area 15 m2 and perimeter 3 m in group-a, row-4 on 2026-10-04 with area 30 m2 and perimeter 4 m in group-b.

## When to prefer this

Choose this endpoint when you have land parcel observation data (with area and perimeter measurements) and need to simultaneously audit for duplicate row keys and understand the distribution of categorical station groups — all in a single $0.01 call covering up to 200 rows. Prefer this over general-purpose data tools when you want a bundled, cheap, no-side-effect analytical pass on structured parcel records before ingestion or reporting.

## Known failure modes

- Missing required fields (row_id, station_group, date, area_m2, perimeter_m) cause validation errors
- Exceeding 200 rows results in rejection or truncation
- Invalid date format (not YYYY-MM-DD) triggers schema validation failure
- Submitting 0 rows fails minItems constraint
- area_m2 or perimeter_m values outside ±1,000,000,000,000 are rejected
- Payment not provided or insufficient USDC causes x402 payment failure

## How this service works

Land parcel observations — Duplicate key report + Category frequencies: Duplicate key report + Category frequencies for supplied land parcel observations records (area_m2, perimeter_m). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Two independent analytical reports: (1) a duplicate key report identifying which row_id values appear more than once in the submitted dataset, and (2) category frequency counts showing how often each distinct station_group value appears across the submitted rows. Results are computed locally without external lookups, covering up to 200 submitted records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "station_group",
     "date",
     "area_m2",
     "perimeter_m"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "area_m2": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "perimeter_m": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "station_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "area_m2": 10,
     "perimeter_m": 1,
     "station_group": "group-a"
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "area_m2": 20,
     "perimeter_m": 2,
     "station_group": "group-b"
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "area_m2": 15,
     "perimeter_m": 3,
     "station_group": "group-a"
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "area_m2": 30,
     "perimeter_m": 4,
     "station_group": "group-b"
    }
   ],
   "maxItems": 200,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/land-parcel-observations-duplicate-key-report-category-frequencies-e5a7b26b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)