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Plaid API vs TaxID

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

APIPlaid APINEW—TaxIDNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Plaid API vs TaxID: common questions

Which is more reliable, Plaid API or TaxID?

On our scheduled checks, TaxID leads on measured uptime — Plaid API 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 Plaid API and TaxID need an API key?

Both ask you to authenticate — Plaid API uses an API key and TaxID uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Plaid API and TaxID from the browser?

Only Plaid API 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 Plaid API and TaxID free for commercial use?

Plaid API 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.