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REG-Vault vs USAspending.gov

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

APIREG-VaultNEW—USAspending.govNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedU.S. Government Work (public domain)
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

REG-Vault vs USAspending.gov: common questions

Which is more reliable, REG-Vault or USAspending.gov?

On our scheduled checks, USAspending.gov leads on measured uptime — REG-Vault at —% versus USAspending.gov 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 REG-Vault and USAspending.gov need an API key?

Neither needs a paid key — REG-Vault is callable with no signup, and USAspending.gov is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call REG-Vault and USAspending.gov from the browser?

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

Are REG-Vault and USAspending.gov free for commercial use?

REG-Vault has unclear commercial terms, and USAspending.gov allows commercial use on its free tier. 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.