# Air Quality Observations String Normalisation

> Air Quality Observations String Normalisation is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Normalises string fields in a batch of air quality observation records (station names, dates) and returns a descriptive string normalisation report.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-air-quality-observations-normalise?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/air-quality-observations-string-normalisation-b47e4516
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MhIpXheXoXo9x6TgPCrue

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-string-normalisation-b47e4516 -d '<json body>'
```

Example prompt: I have up to 200 air quality observation records with station names, dates, PM2.5 values, and humidity percentages — can you run a string normalisation report on them to clean up and standardise the station and date fields?

## When to prefer this

Choose this endpoint when you need to clean and standardise string fields (station names, date formats) in a batch of up to 200 air quality observations before downstream analysis, storage, or reporting. It is ideal for pre-pipeline data quality checks and local descriptive analytics without requiring external enrichment or forecasting. Prefer it over general-purpose data cleaning tools when your data is specifically structured air quality observations with PM2.5 and humidity fields.

## Known failure modes

- Fewer than 1 row or more than 200 rows submitted — schema validation error
- row_id missing or empty — required field violation
- date field does not match YYYY-MM-DD pattern — pattern validation failure
- pm25 or humidity_percent values outside numeric bounds — range error
- Additional properties included in row objects — rejected due to additionalProperties:false
- Payment not received or USDC balance insufficient — 402 Payment Required

## How this service works

Air quality observations - String normalisation: String normalisation 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 string normalisation report.

## Output

A bounded string normalisation report covering the submitted air quality observation records (up to 200 rows). The report includes descriptive analytics on string fields such as station names and dates — covering whitespace issues, case inconsistencies, format conformance, and field-level normalisation summaries. 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-string-normalisation-b47e4516/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)