Is IUCN API down?
Current status, daily uptime history and troubleshooting for the IUCN API (Animals).
No, IUCN is up
IUCN answered our last daily check (Oct 24, 2026, 12:25 UTC) in 789 ms with HTTP 403.
Checking IUCN now…
Sending a request from our server.
IUCN API uptime history
- Uptime
- 2 checks so far
- Last check
- Oct 24, 2026, 12:25 UTC
- Response
- 789 ms · HTTP 403
- Last up
- Now
We check IUCN's listed URL (https://www.iucnredlist.org/en) once a day. History started when IUCN was first checked, so new entries show fewer than 30 days.
What does HTTP 403 mean? Read the 403 explainer.
IUCN API not working for you?
- IUCN needs an API key. A 401 or 403 usually means a missing, expired or mis-sent credential: check whether it belongs in a header or the query string.
- A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header.
- IUCN doesn't send CORS headers, so browsers block calls made directly from a web page. Call it from your server instead.
- If it works from one network but not another, check firewalls, VPNs and regional blocks.
- Check the provider's documentation, status page or social accounts for planned maintenance or a changed endpoint.
Animals APIs up at their last check
- 1
Dog Facts API
Online · 342 msRandom dog facts. A free animals API by dukengn.github.io.
- No API key needed
- Fast: 342 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS - 2
Dog Facts API
Online · 356 msRandom facts of Dogs. A free animals API by Dog API by kinduff.
- No API key needed
- Fast: 356 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS - 3
Cat Facts API
Online · 556 msRandom cat facts. A free animals API by Cat Facts API.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS - 4
Dogs API
Online · 523 msBased on the Stanford Dogs Dataset.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS - 5
HTTP Cat API
Online · 683 msCat for every HTTP Status.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
IUCN API status FAQ
Is IUCN API down right now?
IUCN answered our last daily check (Oct 24, 2026, 12:25 UTC) in 789 ms with HTTP 403. This page also runs a live check from our server when you open it, so you can see whether IUCN is responding at this moment.
How do you check whether IUCN API is up?
Once a day our checker requests IUCN's listed URL (https://www.iucnredlist.org/en) and records whether it answers within 15 seconds. Answers like 401 (needs a key), 403 (blocks bots) or 429 (rate-limited) count as up, because the server responded. The listed URL is often the documentation page, so an API endpoint can occasionally fail while its docs stay up.
What can I use if IUCN API is down?
Free Animals APIs that were up at their last check include Dog Facts, Dog Facts, Cat Facts. See the full list of IUCN alternatives for a comparison.
Why does IUCN API work for others but not for me?
IUCN needs an API key. A 401 or 403 usually means a missing, expired or mis-sent credential: check whether it belongs in a header or the query string. A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header. IUCN doesn't send CORS headers, so browsers block calls made directly from a web page. Call it from your server instead.