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CongressInvests vs TaxID

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

APICongressInvestsHEALTHY92TaxIDHEALTHY89
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms615729
P95 · ms13381556
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CongressInvests vs TaxID: common questions

Which is more reliable, CongressInvests or TaxID?

Both are neck-and-neck — CongressInvests and TaxID each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, CongressInvests or TaxID?

CongressInvests has the lower median latency in our checks — CongressInvests responds in 615 ms versus TaxID at 729 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do CongressInvests and TaxID need an API key?

Both ask you to authenticate — CongressInvests 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 CongressInvests and TaxID from the browser?

Only CongressInvests 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 CongressInvests and TaxID free for commercial use?

CongressInvests 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.