Congressional Stock Brain vs Fixer

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Congressional Stock Brain vs Fixer: common questions

Which is more reliable, Congressional Stock Brain or Fixer?

On our scheduled checks, Fixer leads on measured uptime — Congressional Stock Brain at —% versus Fixer 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 Congressional Stock Brain and Fixer need an API key?

Congressional Stock Brain needs no key, while Fixer requires a free API key. If you want to start calling without signup, reach for Congressional Stock Brain first.

Can I call Congressional Stock Brain and Fixer from the browser?

Yes — both Congressional Stock Brain and Fixer send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Congressional Stock Brain and Fixer free for commercial use?

Congressional Stock Brain has unclear commercial terms, and Fixer 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.