CMS.gov vs Longevity World Cup

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'.

Longevity World Cup runs a public, no-auth JSON API behind its biological-age competition site, serving athlete biomarker and leaderboard data alongside biological-age calculators (phenotypic age, Bortz age) and reference data such as divisions and flags, documented via a live OpenAPI 3.0 spec at /swagger.