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Image-Charts vs SEO Score

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

APIImage-ChartsNEW—SEO ScoreNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Image-Charts vs SEO Score: common questions

Which is more reliable, Image-Charts or SEO Score?

On our scheduled checks, SEO Score leads on measured uptime — Image-Charts at —% versus SEO Score 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 Image-Charts and SEO Score need an API key?

Image-Charts needs no key, while SEO Score requires a free API key. If you want to start calling without signup, reach for Image-Charts first.

Can I call Image-Charts and SEO Score from the browser?

Neither sends browser-friendly CORS headers reliably, so call Image-Charts and SEO Score from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Image-Charts and SEO Score free for commercial use?

Image-Charts has unclear commercial terms, and SEO Score 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.