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restful-api.dev vs Serialif Color

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

APIrestful-api.devNEW—Serialif ColorNEW—
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

restful-api.dev vs Serialif Color: common questions

Which is more reliable, restful-api.dev or Serialif Color?

On our scheduled checks, Serialif Color leads on measured uptime — restful-api.dev at —% versus Serialif Color 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 restful-api.dev and Serialif Color need an API key?

Neither needs a paid key — restful-api.dev is callable with no signup, and Serialif Color is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call restful-api.dev and Serialif Color from the browser?

Only restful-api.dev is browser-friendly — it returns CORS headers over HTTPS. Serialif Color needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are restful-api.dev and Serialif Color free for commercial use?

restful-api.dev has unclear commercial terms, and Serialif Color 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.