# IQAir API

> IQAir returns city air quality, weather, forecasts, and health advice as a workflow and API.

IQAir, also called AirVisual, returns current city air quality, weather, daily forecasts, and health advice; provide a city and optionally a country. Get air quality returns AQI, PM2.5, weather readings, and forecasts, though some data may be unavailable for certain cities.

- Page: https://fous.com/tools/iqair
- Handle: `@iqair`
- Category: [Weather](https://fous.com/tools/category/weather)
- Source website: https://iqair.com
- Last verified: Sep 29, 2026

## Methods

### Get air quality

Operation `get_air_quality`, version 1. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.

Get current city air quality, weather, daily forecast, and health advice from IQAir. Forecast and some readings may be unavailable for certain cities.

**Input**

| Field | Type | Required | Example | Description |
|---|---|---|---|---|
| `city` | string | yes | `"Delhi"` | City to look up, for example Delhi. |
| `country` | string | no | `"France"` | Country to distinguish cities with the same name, for example India. |

**Input schema**

```json
{
  "type": "object",
  "required": [
    "city"
  ],
  "properties": {
    "city": {
      "type": "string",
      "description": "City to look up, for example Delhi.",
      "examples": [
        "Delhi",
        "Paris"
      ]
    },
    "country": {
      "type": "string",
      "default": "",
      "description": "Country to distinguish cities with the same name, for example India.",
      "examples": [
        "France",
        "USA"
      ]
    }
  },
  "additionalProperties": false,
  "examples": [
    {
      "city": "Delhi"
    },
    {
      "city": "Paris",
      "country": "France"
    },
    {
      "city": "Paris",
      "country": "USA"
    }
  ]
}
```

**Output**

| Field | Type | Example | Description |
|---|---|---|---|
| `city` | string | `"Delhi"` |  |
| `aqi_us` | integer | `156` |  |
| `country` | string or null | `"India"` |  |
| `category` | string or null | `"Unhealthy"` |  |
| `iqair_url` | string | `"https://www.iqair.com/air-quality/india/delhi/delhi"` |  |
| `pm25_ug_m3` | number or null | `63` |  |
| `updated_at` | string | `"2026-09-29T08:30:00+05:30"` | Observation time in the city, ISO 8601 with offset. |
| `temperature_c` | number or null | `26` |  |
| `daily_forecast` | array |  |  |
| `daily_forecast[].date` | string | `"2026-09-29"` |  |
| `daily_forecast[].aqi_us` | integer or null | `157` |  |
| `daily_forecast[].category` | string or null | `"Unhealthy"` |  |
| `daily_forecast[].low_temperature_c` | number or null | `24` |  |
| `daily_forecast[].high_temperature_c` | number or null | `34` |  |
| `main_pollutant` | string or null | `"PM2.5"` |  |
| `wind_speed_kmh` | number or null | `7` |  |
| `humidity_percent` | number or null | `64` |  |
| `health_recommendations` | array |  |  |
| `pm25_who_guideline_times` | number or null | `12.6` |  |

**Example input**

```json
{
  "city": "Delhi"
}
```

**Example output**

```json
{
  "city": "Delhi",
  "aqi_us": 156,
  "country": "India",
  "category": "Unhealthy",
  "iqair_url": "https://www.iqair.com/air-quality/india/delhi/delhi",
  "pm25_ug_m3": 63,
  "updated_at": "2026-09-29T08:30:00+05:30",
  "temperature_c": 26,
  "daily_forecast": [
    {
      "date": "2026-09-29",
      "aqi_us": 157,
      "category": "Unhealthy",
      "low_temperature_c": 24,
      "high_temperature_c": 34
    },
    {
      "date": "2026-09-30",
      "aqi_us": 154,
      "category": "Unhealthy",
      "low_temperature_c": 28,
      "high_temperature_c": 37
    },
    {
      "date": "2026-10-01",
      "aqi_us": 140,
      "category": "Unhealthy for sensitive groups",
      "low_temperature_c": 29,
      "high_temperature_c": 39
    }
  ],
  "main_pollutant": "PM2.5",
  "wind_speed_kmh": 7,
  "humidity_percent": 64,
  "health_recommendations": [
    "Avoid outdoor exercise",
    "Close your windows to avoid dirty outdoor air",
    "Wear a mask outdoors"
  ],
  "pm25_who_guideline_times": 12.6
}
```

## Quick start

Replace `YOUR_API_KEY` with a Fous API key. To create one, open Developers at the bottom of Fous Studio, turn on Developer mode, then go to API keys (https://app.fous.com/keys). Change the values in `input` to run the same tool on new data.

```bash
curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 180 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@iqair",
  "visibility": "public",
  "operation": "get_air_quality",
  "version": 1,
  "input": {
    "city": "Delhi"
  },
  "response": {
    "format": "json"
  }
}'
```

```python
# Save as fous.py and run with python3 fous.py. No packages needed.
import json
import urllib.error
import urllib.request

api_key = "YOUR_API_KEY"

body = json.loads("{\n  \"api\": \"@iqair\",\n  \"visibility\": \"public\",\n  \"operation\": \"get_air_quality\",\n  \"version\": 1,\n  \"input\": {\n    \"city\": \"Delhi\"\n  },\n  \"response\": {\n    \"format\": \"json\"\n  }\n}")
request = urllib.request.Request(
    "https://api.fous.com/v1/query",
    data=json.dumps(body).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    with urllib.request.urlopen(request, timeout=180) as response:
        result = json.load(response)
except urllib.error.HTTPError as error:
    raise RuntimeError(f"HTTP {error.code}: {error.read().decode('utf-8', errors='replace')}") from error
if result.get("success") is False:
    raise RuntimeError(result.get("error", {}).get("message", "Request failed"))
print(json.dumps(result["data"]["output"], indent=2))
```

```typescript
// Save as fous.mts and run with npx tsx fous.mts.
const apiKey = "YOUR_API_KEY";

const response = await fetch("https://api.fous.com/v1/query", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  signal: AbortSignal.timeout(180_000),
  body: JSON.stringify({
  "api": "@iqair",
  "visibility": "public",
  "operation": "get_air_quality",
  "version": 1,
  "input": {
    "city": "Delhi"
  },
  "response": {
    "format": "json"
  }
}),
});
type ApiResult = { success: boolean; data?: { output: unknown }; error?: { message: string } };
const result: ApiResult = await response.json();
if (!response.ok || result.success === false) {
  throw new Error(result.error?.message ?? `HTTP ${response.status}`);
}
if (!result.data) throw new Error("Missing API response data");
console.log(result.data.output);
```

## Use from an AI assistant

Connect this tool to Claude Code, Claude Desktop, Cursor, VS Code, Codex and any MCP client as its own MCP server. Each method is a typed tool whose arguments are the method’s input.

- Server URL: `https://api.fous.com/mcp/tools/iqair`
- Authorization: `Authorization: Bearer <Fous API key>`

**Tools**

- `get_air_quality`: Get air quality. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.
- `fous_get_run`: the result of a run that was still going, by its `request_id`. Free.

Claude Code:

```bash
claude mcp add --scope user --transport http fous-iqair https://api.fous.com/mcp/tools/iqair --header "Authorization: Bearer ${FOUS_API_KEY:?Set FOUS_API_KEY to your Fous API key}"
```

To give the assistant every tool, connect `https://api.fous.com/mcp`: it finds one with `fous_search_tools` and runs it with `fous_run_tool`. Setup for other clients: https://fous.com/llms-full.txt.

## Use cases

- Monitor air quality and PM2.5 levels by city
- Compare pollution levels across cities
- Review daily air quality and temperature forecasts
- Share health recommendations for local conditions

## FAQ

### Can I run it with my own inputs?

Yes. Change the inputs in Studio and press Run, or send new inputs from your code, or ask a connected AI assistant.

### Can I call this IQAir tool as an API?

Yes. Send a POST request to /v1/query with your Fous API key and the inputs, and get JSON back.

### How much does it cost?

Each completed run costs 1 credit. Failed runs without a completed receipt are free; completed work can remain charged if delivery is interrupted. With pay as you go, a credit costs 1¢. Monthly plans cost less per credit.

### Do I need a IQAir account?

No. You only need a Fous account.

### How current is the data?

Fous gets the data from iqair.com when you run it. Some results are reused for up to 24 hours, and results that use your account or key are never reused. It was last verified on Sep 29, 2026.

### What is the current air quality in a city?

Get air quality returns the city’s AQI, category, PM2.5 level, main pollutant, and observation time.

### What is the daily air quality forecast?

Get air quality returns forecast dates, AQI, categories, and low and high temperatures when available.

### What health advice is available for a city?

Get air quality returns health recommendations for the city’s current conditions.

## Related

- [AirNow API](https://fous.com/tools/airnow.md): Current and forecast air quality for reporting areas in the United States and covered cities in Canada and Mexico.
- [AccuWeather API](https://fous.com/tools/accuweather.md): AccuWeather provides current conditions and RealFeel, plus up to 15 available daily forecasts; shorter public forecasts may return fewer days.
- [MSN Weather API](https://fous.com/tools/msn-weather.md): MSN Weather provides current conditions and forecasts for places worldwide, including up to 10 days ahead and optional hourly forecasts for the next 24 hours.
- [The Weather Channel API](https://fous.com/tools/the-weather-channel.md): The Weather Channel returns current conditions, today’s high/low, up to 15 daily forecasts (sometimes fewer), 1–48 local hourly forecasts, and active severe weather alerts.
- [Weather Underground API](https://fous.com/tools/weather-underground.md): Historical and current weather conditions from stations worldwide.
- [National Weather Service API](https://fous.com/tools/national-weather-service.md): National Weather Service provides U.S. day-and-night forecasts for seven days, hourly forecasts for up to 156 hours where available, active alerts, and latest nearby station observations.
- [Pollen.com API](https://fous.com/tools/pollen-com.md): Pollen levels and allergy forecasts for locations in the United States.
- [Time and Date API](https://fous.com/tools/time-and-date.md): Time and Date provides current city times, zones, daylight-saving changes; meeting conversions (1970–2030); daily solar times and twilight; and business-day counts based on published holiday calendars.
- [All Weather tools](https://fous.com/tools/category/weather)