Environment · head-to-head
Danish data service Energi vs IQAir
Energi Data Service is the Danish transmission system operator Energinet's open-data platform, publishing dozens of live datasets — day-ahead power prices, grid emissions, consumption, and more — as a free public JSON API with no key required. Its older Elspotprices dataset was retired after the Nordic market's move to 15-minute settlement on 2025-09-30, superseded by the still-live DayAheadPrices dataset.
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.
| Danish data service Energi | IQAir | |
|---|---|---|
| Authentication | None | API Key |
| Pricing | free | freemium |
| Formats | JSON | JSON |
| CORS | no | yes |
| HTTPS | Yes | Yes |
Danish data service Energi needs no API key, while IQAir requires API Key — pick Danish data service Energi to start without signup.