Hourly air-quality data (PM2

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "forecast_days": 2,
          "hourly": "pm2_5,pm10,european_aqi",
          "latitude": 48.8566,
          "longitude": 2.3522
        },
        "type": "http"
      },
      "output": {
        "example": {
          "forecast_days": 1,
          "hourly": {
            "european_aqi": [
              22,
              21
            ],
            "pm10": [
              12.4,
              11.8
            ],
            "pm2_5": [
              8.2,
              7.9
            ],
            "time": [
              "2026-07-13T00:00",
              "2026-07-13T01:00"
            ]
          },
          "hourly_units": {
            "european_aqi": "EAQI",
            "pm10": "μg/m³",
            "pm2_5": "μg/m³",
            "time": "iso8601"
          },
          "latitude": 48.9,
          "longitude": 2.4,
          "source": "CAMS (Copernicus) via Open-Meteo, CC-BY 4.0 attribution required (open-meteo.com)"
        },
        "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": {
                "forecast_days": {
                  "default": 2,
                  "maximum": 7,
                  "minimum": 1,
                  "type": "integer"
                },
                "hourly": {
                  "default": "pm2_5,pm10,european_aqi",
                  "description": "Comma-separated variables among pm2_5, pm10, ozone, nitrogen_dioxide, sulphur_dioxide, carbon_monoxide, european_aqi, us_aqi, uv_index, dust, aerosol_optical_depth",
                  "type": "string"
                },
                "latitude": {
                  "description": "Latitude WGS84 (-90..90)",
                  "type": "number"
                },
                "longitude": {
                  "description": "Longitude WGS84 (-180..180)",
                  "type": "number"
                }
              },
              "required": [
                "latitude",
                "longitude"
              ],
              "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/air/quality"
# -> 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/air/quality");
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/air/quality")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header