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Markbase vs TaxID

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

APIMarkbaseNEW—TaxIDNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limit30 req/window · 29 remaining · resets 1783519324Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Markbase vs TaxID: common questions

Which is more reliable, Markbase or TaxID?

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

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

Can I call Markbase and TaxID from the browser?

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

Are Markbase and TaxID free for commercial use?

Markbase has unclear commercial terms, and TaxID 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.