Namedays Calendar vs Tumblr
Same instrument, two spec sheets — measured, not claimed.
Namedays Calendar vs Tumblr: common questions
Which is more reliable, Namedays Calendar or Tumblr?
On our scheduled checks, Tumblr leads on measured uptime — Namedays Calendar at 92.1% versus Tumblr 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, Namedays Calendar or Tumblr?
Tumblr has the lower median latency in our checks — Namedays Calendar responds in 536 ms versus Tumblr at 146 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 Namedays Calendar and Tumblr need an API key?
Namedays Calendar needs no key, while Tumblr requires OAuth. If you want to start calling without signup, reach for Namedays Calendar first.
Can I call Namedays Calendar and Tumblr from the browser?
Yes — both Namedays Calendar 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 Namedays Calendar and Tumblr free for commercial use?
Namedays Calendar 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.