# IQAir, free: Air quality API

> Air Quality Metrics: AQI Index, PM2.5, PM10, SO2, CO, O3, and NO2 levels

IQAir's air quality API on its Community plan. It costs $0.00 per 1,000 places. It returns 1 of the 6 key fields we check: US AQI.
We rank 94 plans by price. [OpenWeather's £370 monthly plan](https://datacircle.dev/air-quality-apis/openweather/370-monthly-professional-get-data-2-5-air-pollution/llms.txt) is the cheapest paid plan per 1,000 places: $0.00049.
[WeatherAPI.com](https://datacircle.dev/air-quality-apis/weatherapi-com/7-monthly/llms.txt), [Open-Meteo](https://datacircle.dev/air-quality-apis/open-meteo/99-monthly-api-professional-get-v1-air-quality-air-quality/llms.txt) and [Weatherbit](https://datacircle.dev/air-quality-apis/weatherbit/495-monthly-business-get-v2-0-forecast-airquality/llms.txt) are the best air quality API providers in our benchmark.

- This page: https://datacircle.dev/air-quality-apis/iqair/free
- [Best air quality API in 2026: pricing compared](https://datacircle.dev/best-air-quality-api.txt)
- Get it: https://www.iqair.com/air-quality-monitors/api
- Request: `GET /v2/nearest_city`
- API key: with the plan, on https://www.iqair.com/air-quality-monitors/api
- Its API docs: https://api-docs.iqair.com/
- Sold by: IQAir (https://www.iqair.com)
- Checked: 2026-10-30

## In the answer

- Completeness: 17%
- US AQI: ✓

## Price

- $ per 1,000 places: $0.00
- Per: call
- Billing: free

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Air Quality Metrics: AQI Index, PM2.5, PM10, SO2, CO, O3, and NO2 levels

## Data

- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: 10,000 requests a month
- Enough for: 10,000 calls a month

## Rate limit

- Per day: 500
- Per second: 0.083
- Batch: 1

## The call

- You send: lat, lon
- Method: GET
- Path: /v2/nearest_city

## About the plan

- Plan: Community
- Who can get it: anyone

## The 8 fields the plan's answer can hold

city name, state name, country name, latitude, longitude, UTC time, US AQI, China AQI

## IQAir's plans (3)

- [IQAir, free](https://datacircle.dev/air-quality-apis/iqair/free/llms.txt): $0.00 per 1,000, 17% complete
- [IQAir, contact us, Enterprise, GET /v2/nearest_city](https://datacircle.dev/air-quality-apis/iqair/contact-us-enterprise-get-v2-nearest-city/llms.txt): 50% complete
- [IQAir, contact us, Startup, GET /v2/nearest_city](https://datacircle.dev/air-quality-apis/iqair/contact-us-startup-get-v2-nearest-city/llms.txt): 50% complete

## IQAir's calls (2)

- `GET /v2/nearest_city`: [IQAir, free](https://datacircle.dev/air-quality-apis/iqair/free/llms.txt)
- `GET /v2/nearest_station`: [IQAir, contact us, Enterprise, GET /v2/nearest_station](https://datacircle.dev/air-quality-apis/iqair/contact-us-enterprise-get-v2-nearest-station/llms.txt)

## IQAir's APIs (3)

- [IQAir: air quality API pricing, 3 plans](https://datacircle.dev/air-quality-apis/iqair/free/llms.txt)
- [IQAir: current weather API pricing, 3 plans](https://datacircle.dev/current-weather-apis/iqair/free/llms.txt)
- [IQAir: weather forecast API pricing, 1 plan, GET /v2/nearest_city](https://datacircle.dev/weather-forecast-apis/iqair/contact-us-enterprise-get-v2-nearest-city/llms.txt)
- [IQAir: weather forecast API pricing, 1 plan, GET /v2/nearest_station](https://datacircle.dev/weather-forecast-apis/iqair/contact-us-enterprise-get-v2-nearest-station/llms.txt)

## IQAir: air quality API alternatives

- [WeatherAPI.com, free](https://datacircle.dev/air-quality-apis/weatherapi-com/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [Open-Meteo, free, GET /v1/air-quality, Air quality](https://datacircle.dev/air-quality-apis/open-meteo/free-get-v1-air-quality-air-quality/llms.txt): $0.00 per 1,000, 100% complete, live
- [Weatherbit, free trial, GET /v2.0/forecast/airquality](https://datacircle.dev/air-quality-apis/weatherbit/free-trial-get-v2-0-forecast-airquality/llms.txt): $0.00 per 1,000, 50% complete
- [Botoi, free](https://datacircle.dev/air-quality-apis/botoi/free/llms.txt): $0.00 per 1,000, 67% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-30.

- https://api-docs.iqair.com/
- https://www.iqair.com/air-quality-monitors/api
- https://www.iqair.com/legal/terms-conditions