Launch Library 2 vs Stock Sentiment API
Same instrument, two spec sheets — measured, not claimed.
Launch Library 2 vs Stock Sentiment API: common questions
Which is more reliable, Launch Library 2 or Stock Sentiment API?
On our scheduled checks, Stock Sentiment API leads on measured uptime — Launch Library 2 at 3.9% versus Stock Sentiment API at 100% 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, Launch Library 2 or Stock Sentiment API?
Stock Sentiment API has the lower median latency in our checks — Launch Library 2 responds in 546 ms versus Stock Sentiment API at 531 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 Launch Library 2 and Stock Sentiment API need an API key?
Launch Library 2 needs no key, while Stock Sentiment API requires a free API key. If you want to start calling without signup, reach for Launch Library 2 first.
Can I call Launch Library 2 and Stock Sentiment API from the browser?
Yes — both Launch Library 2 and Stock Sentiment API 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 Launch Library 2 and Stock Sentiment API free for commercial use?
Launch Library 2 has unclear commercial terms, and Stock Sentiment API 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.