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Fed Treasury vs TaxID

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

APIFed TreasuryNEW—TaxIDNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseOpen U.S. Government data (public domain)Unverified
Free tierFree — no API keyFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fed Treasury vs TaxID: common questions

Which is more reliable, Fed Treasury or TaxID?

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

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

Can I call Fed Treasury and TaxID from the browser?

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

Are Fed Treasury and TaxID free for commercial use?

Fed Treasury allows commercial use on its free tier, 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.