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Open5e vs SuperHeroes

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

APIOpen5eNEW—SuperHeroesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseSRD content under OGL 1.0a; API/site MIT-licensedUnverified
Free tierFree, no API key requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Open5e vs SuperHeroes: common questions

Which is more reliable, Open5e or SuperHeroes?

On our scheduled checks, SuperHeroes leads on measured uptime — Open5e at —% versus SuperHeroes 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 Open5e and SuperHeroes need an API key?

Open5e needs no key, while SuperHeroes requires a free API key. If you want to start calling without signup, reach for Open5e first.

Can I call Open5e and SuperHeroes from the browser?

Yes — both Open5e and SuperHeroes 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 Open5e and SuperHeroes free for commercial use?

Open5e has unclear commercial terms, and SuperHeroes 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.