Umeå Open Data vs Wikipedia

Umeå's open-data portal runs on the OpenDataSoft platform, publishing the Swedish city's GIS, transit, and municipal datasets through the standard ODS Explore v2.1 API. Every dataset can be queried, filtered, and exported as JSON, CSV, or GeoJSON with no authentication required for public data.

The MediaWiki action API that powers Wikipedia gives keyless access to full-text search, page content/extracts, revision history, and category membership across every language edition. A live probe of en.wikipedia.org/w/api.php confirms open, keyless reads and resolves the CORS story: browsers must append the documented `origin=*` query parameter (a plain Origin header alone is rejected as a "mismatch"), after which the response carries a wildcard Access-Control-Allow-Origin.