# Clink Forge AQI Category Summary

> Clink Forge AQI Category Summary is a paid API for AI agents from api.clinkforge.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Returns government-sourced air quality index (AQI) category summary data with cryptographic provenance attestation, paid per-call via x402 USDC micropayment.

## Facts

- Endpoint: GET https://api.clinkforge.com/v1/p/aqi-category-summary
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/clink-forge-aqi-category-summary-0888a06a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GRjqQn71d4MXSMWq9MJuZ

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 clink-forge-aqi-category-summary-0888a06a
```

Example prompt: Can you pull the latest AQI category summary from Clink Forge — I need the government-sourced air quality breakdown with the cryptographic provenance chain so I can verify the data source?

## When to prefer this

Choose this endpoint when you need government-sourced AQI category summary data with verifiable, tamper-evident cryptographic provenance — ideal for autonomous agents, compliance workflows, or research pipelines where data authenticity must be proven. Prefer over generic weather/AQI APIs when you need an auditable provenance chain signed by a known key. Best when operating in a trustless or multi-party environment where data origin verification matters as much as the data itself.

## Known failure modes

- Payment not included or insufficient USDC — returns HTTP 402 Payment Required
- Invalid or malformed x402 payment header — request rejected
- Data temporarily unavailable from upstream government source — may return empty or stale data
- Network timeout or API downtime — returns 5xx error
- Incorrect Base network or wallet configuration — payment fails to settle

## How this service works

Pay per call over x402. USDC on Base, no account, no API key. 28 government-sourced data products at $0.001–$0.05 per call, every response signed and provenance-chained.

## Output

Returns a JSON object containing: an array of AQI category summary data rows sourced from government agencies, a provenance chain with SHA-256 hashes, authority name, source government URL, and observation timestamp, a cryptographic attestation with a base64 signature and result digest signed by a Clink Forge key, a payment receipt confirming the $0.02 USDC settlement, the product name and version, and a row count.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "field": "value",
    "_record_id": "R-100"
   }
  ],
  "product": "example-product",
  "row_count": 1,
  "provenance": [
   {
    "hash": "sha256...",
    "authority": "AGENCY",
    "source_url": "https://agency.gov/data",
    "observed_at": "2026-08-25T00:00:00Z"
   }
  ],
  "attestation": {
   "signature": "base64...",
   "result_digest": "sha256...",
   "signing_key_id": "forge-signing-1"
  },
  "payment_receipt": {
   "amount_usd": 0.01,
   "settlement_ref": "0xtx..."
  },
  "product_version": 1
 },
 "description": "data rows + provenance chain + attestation"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/clink-forge-aqi-category-summary-0888a06a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.clinkforge.com](https://www.zero.xyz/host/api.clinkforge.com/llms.txt)