Covers over 1000 cities worldwide
Check the docs depth and real endpoint shape before assuming production fit.
Sign up to obtain an API key. Use the key to authenticate requests to access air quality data.
Uptime · 30-day window
About this API
The AQICN API provides access to air quality index data for over 1000 cities worldwide. It is designed for developers who need reliable and standardized air pollution information to integrate into their applications or services.
This API is relevant for weather apps, environmental monitoring tools, and public health platforms that require up-to-date air quality metrics. By offering data across many locations, it enables broad geographic coverage for users interested in air pollution levels.
Authentication is handled via an API key, ensuring controlled access to the data. The API focuses on delivering essential air quality index values without additional unrelated features, making it straightforward for developers to incorporate environmental data into their projects.
What you can build
- 1Display real-time air quality index for cities
- 2Generate air pollution alerts based on AQI data
- 3Integrate air quality data into weather applications
- 4Visualize historical air quality trends
Strengths & limitations
Strengths
- Covers over 1000 cities worldwide
- Provides standardized air quality index data
- Supports API key authentication
Getting started
Sign up to obtain an API key. Use the key to authenticate requests to access air quality data.
FAQ
Do I need an API key to use AQICN?+
Yes, an API key is required to authenticate and access the data.
What kind of data does the API provide?+
It provides air quality index data for over 1000 cities worldwide.
Is HTTPS required to access the API?+
While not explicitly stated, using HTTPS is recommended for secure communication.
Can I use the API directly from a browser?+
Usage from browsers depends on CORS policy, which is not specified here.
Technical details
- Auth type
- api_key
- Pricing
- free
- Protocols
- REST
- Response time
- 914 ms
- Last health check
- 7/14/2026, 5:45:47 AM