# Clink Forge NWS Alert Severity Summary

> Clink Forge NWS Alert Severity Summary is a paid API for AI agents from api.clinkforge.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns a cryptographically attested summary of National Weather Service alert severities, sold per-call over the x402 micropayment protocol.

## Facts

- Endpoint: GET https://api.clinkforge.com/v1/p/nws-alert-severity-summary
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/clink-forge-nws-alert-severity-summary-6fafbb68
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hpR037AKM98_rJNltEirp

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-nws-alert-severity-summary-6fafbb68
```

Example prompt: Can you pull the latest NWS alert severity summary from Clink Forge — I need the attested, per-call data with provenance showing it came from the official NWS source?

## When to prefer this

Choose this endpoint when you need NWS alert severity data with a verifiable, cryptographically signed provenance chain — particularly in automated pipelines, compliance workflows, or any context where you must prove the data originated from an official government source. It is especially suited for agents that can pay micropayments via x402, need a tamper-evident audit trail, or must demonstrate data authenticity without relying on a trusted intermediary.

## Known failure modes

- Payment not included or insufficient — returns HTTP 402 with payment requirements
- Invalid or expired x402 payment token — payment rejected before data is served
- NWS upstream data unavailable — may return empty rows or a service error
- Malformed request parameters — returns 400 with schema validation error
- Rate limiting or quota exceeded — returns 429

## 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 JSON containing data rows with alert severity payload and record IDs, a product slug and version, a provenance block with license ID (US-GOV-PD), source URL, and observation timestamp, an Ed25519 cryptographic attestation signature, and an on-chain payment receipt with settlement reference — enabling end-to-end verification that the data originated from the official NWS source.

## 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-nws-alert-severity-summary-6fafbb68/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)