Health · head-to-head
CMS.gov vs Covid-19 Datenhub
CMS Provider Data Catalog exposes hundreds of Medicare quality, cost, and comparison datasets (hospitals, nursing homes, dialysis facilities, and more) through a DKAN-based metastore and datastore API that returns JSON by default and CSV on request, with no signup required. A live GET against the dataset-listing and datastore query endpoints succeeds with no credentials. A live Origin-header probe against the datastore query endpoint returns no Access-Control-Allow-Origin header on either a GET or an OPTIONS preflight, and since access needed no key at all, the stored 'API Key' auth was corrected to 'None'.
Robert Koch Institute's ArcGIS Hub aggregating dozens of official German COVID-19 datasets — case, death, vaccination, and hospitalisation figures by Kreis and Bundesland — each independently queryable as a standard Esri ArcGIS REST Feature Service rather than through one unified endpoint. A live query against the flagship RKI_COVID19 FeatureServer (services7.arcgis.com) returns Access-Control-Allow-Origin: *, resolving the stored 'unknown' cors to 'yes'.
| CMS.gov | Covid-19 Datenhub | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, CSV | JSON |
| CORS | no | yes |
| HTTPS | Yes | Yes |
Covid-19 Datenhub supports CORS, while CMS.gov doesn't — pick Covid-19 Datenhub for direct browser calls.