CongressInvests vs Markbase
Same instrument, two spec sheets — measured, not claimed.
CongressInvests vs Markbase: common questions
Which is more reliable, CongressInvests or Markbase?
On our scheduled checks, CongressInvests leads on measured uptime — CongressInvests at 100% versus Markbase at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, CongressInvests or Markbase?
CongressInvests has the lower median latency in our checks — CongressInvests responds in 615 ms versus Markbase at 866 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 Markbase need an API key?
Markbase needs no key, while CongressInvests requires a free API key. If you want to start calling without signup, reach for Markbase first.
Can I call CongressInvests and Markbase from the browser?
Yes — both CongressInvests and Markbase 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 CongressInvests and Markbase free for commercial use?
CongressInvests has unclear commercial terms, and Markbase 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.