Weather · head-to-head
AviationWeather vs IPMA
The legacy Text Data Server referenced by the original dataserver URL has been discontinued and replaced by the new Aviation Weather Center Data API, reachable at aviationweather.gov/data/api. It serves worldwide METAR/TAF, US/North-Atlantic PIREPs, global SIGMETs, and CONUS G-AIRMETs (which replaced text AIRMETs in January 2025) in raw text, JSON, GeoJSON, CSV, XML, or IWXXM, with no authentication but a 100-requests/minute rate limit.
IPMA's open-data service is a plain directory of continuously-refreshed static JSON files, not just a single forecast endpoint: it covers daily/hourly weather forecasts, real-time station observations, sea-area and district warnings for mainland Portugal, the Azores and Madeira, plus separate seismic and biology (pollen) datasets from the same institute. No registration is required, though IPMA asks heavy users to email its webmaster for usage statistics.
| AviationWeather | IPMA | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, GeoJSON, XML, CSV, Text | JSON |
| CORS | no | yes |
| HTTPS | Yes | Yes |
IPMA supports CORS, while AviationWeather doesn't — pick IPMA for direct browser calls.