Active weather alerts from the US National Weather Service (NOAA, public domain, real-time

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "area": "CA",
          "severity": "Severe"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "alerts": [
            {
              "area_desc": "San Gorgonio Pass Near Banning",
              "certainty": "Likely",
              "description": "* WHAT...Temperatures up to 106 expected...",
              "event": "Heat Advisory",
              "expires": "2026-07-14T20:00:00-07:00",
              "headline": "Heat Advisory issued July 13 at 2:57PM PDT",
              "onset": "2026-07-13T14:57:00-07:00",
              "sender": "NWS San Diego CA",
              "severity": "Severe",
              "urgency": "Expected"
            }
          ],
          "count": 1,
          "filters": {
            "area": "CA",
            "severity": "Severe"
          },
          "source": "US National Weather Service (api.weather.gov, NOAA, public domain, real-time)",
          "truncated": false
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "area": {
                  "description": "2-letter US state or marine area code (e.g. CA)",
                  "type": "string"
                },
                "event": {
                  "description": "Exact event name, e.g. 'Tornado Warning'",
                  "type": "string"
                },
                "point": {
                  "description": "GPS point 'lat,lon' (alternative to area)",
                  "type": "string"
                },
                "severity": {
                  "enum": [
                    "Extreme",
                    "Severe",
                    "Moderate",
                    "Minor",
                    "Unknown"
                  ],
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://data.greeneris.io/v1/us/wx-alerts"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://data.greeneris.io/v1/us/wx-alerts");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://data.greeneris.io/v1/us/wx-alerts")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header