Nager.Date vs Tumblr
Same instrument, two spec sheets — measured, not claimed.
Nager.Date vs Tumblr: common questions
Which is more reliable, Nager.Date or Tumblr?
Both are neck-and-neck — Nager.Date and Tumblr 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, Nager.Date or Tumblr?
Nager.Date has the lower median latency in our checks — Nager.Date responds in 56 ms versus Tumblr at 208 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 Nager.Date and Tumblr need an API key?
Nager.Date needs no key, while Tumblr requires OAuth. If you want to start calling without signup, reach for Nager.Date first.
Can I call Nager.Date and Tumblr from the browser?
Yes — both Nager.Date and Tumblr 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 Nager.Date and Tumblr free for commercial use?
Nager.Date has unclear commercial terms, and Tumblr 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.