Environment · head-to-head
IQAir vs PM2.5 Open Data Portal
IQAir's AirVisual API serves real-time and forecast air-quality and weather data for stations and cities worldwide. Its free Community plan covers up to 500 calls/day, with paid Startup ($399/mo) and Enterprise ($999/mo) tiers unlocking much higher volume.
The LASS PM2.5 Open Data Portal aggregates readings from Taiwan's low-cost civic air-quality sensor networks (AirBox, LASS, EPA, and others) into freely downloadable JSON snapshots, refreshed continuously with no key required. It also runs a DCF (Data Calibration Framework) service that publishes machine-learning-corrected PM2.5 estimates per monitoring site.
| IQAir | PM2.5 Open Data Portal | |
|---|---|---|
| Authentication | API Key | None |
| Pricing | freemium | free |
| Formats | JSON | JSON |
| CORS | yes | no |
| HTTPS | Yes | Yes |
PM2.5 Open Data Portal needs no API key, while IQAir requires API Key — pick PM2.5 Open Data Portal to start without signup.