# Air Quality Index & Pollutant Concentrations Lookup

> Air Quality Index & Pollutant Concentrations Lookup is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns current US AQI and key pollutant concentrations (PM2.5, PM10, ozone, NO2, SO2, CO) for any geographic coordinate worldwide.

## Facts

- Endpoint: GET https://agent402.tools/api/weather-air-quality
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/air-quality-index-pollutant-concentrations-lookup-955c5008
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9yhQlIE4g_leCbjk8EEbL

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 air-quality-index-pollutant-concentrations-lookup-955c5008
```

Example prompt: What's the current air quality index and PM2.5 level in New Delhi — coordinates 28.61 north, 77.23 east?

## When to prefer this

Use this endpoint when you need real-time, globally available air quality data without requiring an API key. Ideal for agents that need AQI and multi-pollutant breakdowns (PM2.5, PM10, ozone, NO2, SO2, CO) for any coordinate on Earth. Prefer this over weather-only endpoints when pollution or health-related air quality context is the primary need.

## Known failure modes

- Missing lat or lon parameters returns a 400 or error response
- Coordinates out of valid range (-90 to 90 lat, -180 to 180 lon) may return an error
- Remote Open-Meteo API downtime may cause unavailability
- Very remote locations may return null or missing pollutant values if no nearby sensor data exists

## How this service works

Current air quality index and pollutant concentrations for any location: US AQI, PM2.5, PM10, ozone, NO2, SO2, CO. Open-Meteo air quality API, no key, global. ?lat=28.61&lon=77.23.

## Output

Returns the current US AQI value along with pollutant concentrations for PM2.5, PM10, ozone, NO2, SO2, and CO at the specified latitude/longitude, sourced from the Open-Meteo global air quality dataset.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "lat",
      "lon"
     ],
     "properties": {
      "lat": {
       "type": "number",
       "description": "Latitude, -90 to 90"
      },
      "lon": {
       "type": "number",
       "description": "Longitude, -180 to 180"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "lat",
      "lon",
      "airQuality",
      "source"
     ],
     "properties": {
      "lat": {
       "type": "number"
      },
      "lon": {
       "type": "number"
      },
      "source": {
       "type": "string"
      },
      "airQuality": {
       "type": "object",
       "properties": {
        "pm10": {
         "type": "number"
        },
        "pm25": {
         "type": "number"
        },
        "time": {
         "type": "string"
        },
        "ozone": {
         "type": "number"
        },
        "units": {
         "type": "object"
        },
        "usAqi": {
         "type": "integer"
        },
        "category": {
         "type": "string"
        },
        "carbonMonoxide": {
         "type": "integer"
        },
        "sulphurDioxide": {
         "type": "number"
        },
        "nitrogenDioxide": {
         "type": "number"
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "lat": 28.6139,
  "lon": 77.209,
  "source": "air-quality-api.open-meteo.com (CC BY 4.0)",
  "airQuality": {
   "pm10": 88.1,
   "pm25": 52.3,
   "time": "2026-06-23T14:00",
   "ozone": 45.2,
   "units": {
    "pm": "μg/m³",
    "gases": "μg/m³"
   },
   "usAqi": 142,
   "category": "Unhealthy for Sensitive Groups",
   "carbonMonoxide": 420,
   "sulphurDioxide": 12.4,
   "nitrogenDioxide": 28.7
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/air-quality-index-pollutant-concentrations-lookup-955c5008/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)