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Kroki vs ListLoco API

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

APIKrokiNEW—ListLoco APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Kroki vs ListLoco API: common questions

Which is more reliable, Kroki or ListLoco API?

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

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

Can I call Kroki and ListLoco API from the browser?

Only Kroki is browser-friendly — it returns CORS headers over HTTPS. ListLoco API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Kroki and ListLoco API free for commercial use?

Kroki has unclear commercial terms, and ListLoco 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.