# Air Quality Observations – Duplicate Key Report

> Air Quality Observations – Duplicate Key Report is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Identifies duplicate key combinations in air quality observation records (station, date, PM2.5, humidity) submitted in a batch of up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-air-quality-observations-key-duplicates?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/air-quality-observations-duplicate-key-report-cbfdb6a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kweJyFIf3IorGiRMqloc3

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 air-quality-observations-duplicate-key-report-cbfdb6a4 -d '<json body>'
```

Example prompt: Check my air quality observation records for duplicate keys — I have a batch of readings from stations group-a and group-b between 2026-10-01 and 2026-10-04 with PM2.5 and humidity values, and I need to know which row_id entries share duplicate station/date combinations.

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.01 USDC) local duplicate key audit on a batch of up to 200 air quality observation records without needing enrichment or forecasting. It is ideal for data pipeline pre-validation, ETL deduplication checks, or compliance data cleaning specific to the air quality domain (station, date, PM2.5, humidity schema).

## Known failure modes

- Fewer than 1 row submitted returns a validation error
- More than 200 rows submitted exceeds the maxItems limit and returns an error
- Missing required fields (row_id, station, date, pm25, humidity_percent) on any row causes schema validation failure
- Date strings not matching YYYY-MM-DD pattern are rejected
- Payment of 0.01 USDC not provided results in 402 Payment Required
- Malformed JSON body returns a 400 Bad Request

## How this service works

Air quality observations - Duplicate key report: Duplicate key report for Air quality observations. Up to 200 supplied typed records. Local descriptive analytics; no enrichment or forecast. One of 25 new profiles across 20 shared operations in this industry. 0.01 USDC includes one bounded duplicate key report report.

## Output

A descriptive analytics report identifying which rows in the submitted batch share duplicate key combinations across the key fields (station, date, and associated measurements). The report includes details on which row_ids are duplicates and how many collisions exist, enabling data cleaning decisions. No enrichment, forecasting, or external data is added.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "station",
     "date",
     "pm25",
     "humidity_percent"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "pm25": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "station": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "humidity_percent": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "pm25": 10,
     "row_id": "row-1",
     "station": "group-a",
     "humidity_percent": 1
    },
    {
     "date": "2026-10-02",
     "pm25": 20,
     "row_id": "row-2",
     "station": "group-b",
     "humidity_percent": 2
    },
    {
     "date": "2026-10-03",
     "pm25": 15,
     "row_id": "row-3",
     "station": "group-a",
     "humidity_percent": 3
    },
    {
     "date": "2026-10-04",
     "pm25": 30,
     "row_id": "row-4",
     "station": "group-b",
     "humidity_percent": 4
    }
   ],
   "maxItems": 200,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/air-quality-observations-duplicate-key-report-cbfdb6a4/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)