Api Endpoint

opendata402

Latest hourly air quality measurements (NO2, PM10, PM2.5, ozone) from about 3,000 official monitoring stations in Europe (European Environment Agency, up-to-date unvalidated data, refreshed hourly): nearest stations to a location, or all stations of a country, with station type (traffic, background, industrial), area, value, unit and measurement hour. Use it for health, travel and environment questions. EEA, CC BY 4.0.

Open interactive test console

Offering

Provider: opendata402.com
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Weather And Environment
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://opendata402.com/v1/air/eu
MIME type: application/json
First seen: 2026-10-16T01:50:24.663Z
Last seen: 2026-11-02T05:44:47.115Z
Tags: air-quality, pollution, europe, eea, environment

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.001 USDC
Atomic price: 1000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3: 0.001 USDC
Atomic price: 1000 · Network: eip155:42161 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "1000",
    "payTo": "0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "1000",
    "payTo": "0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1"
  }
]

Observed health

Status: Healthy
Latest latency: 155 ms
Average latency: 774 ms
HTTP status: 402
Last checked: 2026-11-02T05:44:47.109Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "lat": {
          "type": "string",
          "pattern": "^-?[0-9]{1,2}(\\.[0-9]{1,6})?$",
          "description": "Latitude."
        },
        "lon": {
          "type": "string",
          "pattern": "^-?[0-9]{1,3}(\\.[0-9]{1,6})?$",
          "description": "Longitude."
        },
        "radius_km": {
          "type": "string",
          "pattern": "^([1-9]|[1-9][0-9]|1[0-9][0-9]|200)$",
          "description": "Search radius in km (default 25, max 200)."
        },
        "country": {
          "type": "string",
          "pattern": "^[A-Z]{2}$",
          "description": "ISO country code instead of a location."
        },
        "pollutant": {
          "type": "string",
          "enum": [
            "no2",
            "pm10",
            "pm25",
            "o3"
          ],
          "description": "Only stations measuring this pollutant."
        },
        "limit": {
          "type": "string",
          "pattern": "^([1-9]|1[0-9]|20)$",
          "description": "Max stations (default 10, max 20)."
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "country": {
              "description": "ISO country code instead of a location.",
              "pattern": "^[A-Z]{2}$",
              "type": "string"
            },
            "lat": {
              "description": "Latitude.",
              "pattern": "^-?[0-9]{1,2}(\\.[0-9]{1,6})?$",
              "type": "string"
            },
            "limit": {
              "description": "Max stations (default 10, max 20).",
              "pattern": "^([1-9]|1[0-9]|20)$",
              "type": "string"
            },
            "lon": {
              "description": "Longitude.",
              "pattern": "^-?[0-9]{1,3}(\\.[0-9]{1,6})?$",
              "type": "string"
            },
            "pollutant": {
              "description": "Only stations measuring this pollutant.",
              "enum": [
                "no2",
                "pm10",
                "pm25",
                "o3"
              ],
              "type": "string"
            },
            "radius_km": {
              "description": "Search radius in km (default 25, max 200).",
              "pattern": "^([1-9]|[1-9][0-9]|1[0-9][0-9]|200)$",
              "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"
}