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jsDelivr vs Wahlumfragen Datenbank API

Same instrument, two spec sheets — measured, not claimed.

APIjsDelivrNEW—Wahlumfragen Datenbank APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree, no keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

jsDelivr vs Wahlumfragen Datenbank API: common questions

Which is more reliable, jsDelivr or Wahlumfragen Datenbank API?

On our scheduled checks, Wahlumfragen Datenbank API leads on measured uptime — jsDelivr at —% versus Wahlumfragen Datenbank API at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do jsDelivr and Wahlumfragen Datenbank API need an API key?

Neither needs a paid key — jsDelivr is callable with no signup, and Wahlumfragen Datenbank API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call jsDelivr and Wahlumfragen Datenbank API from the browser?

Yes — both jsDelivr and Wahlumfragen Datenbank API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are jsDelivr and Wahlumfragen Datenbank API free for commercial use?

jsDelivr has unclear commercial terms, and Wahlumfragen Datenbank API has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.