Is Codeforces API down?
Current status, daily uptime history and troubleshooting for the Codeforces API (Programming).
No, Codeforces is up
Codeforces answered our last daily check (Oct 24, 2026, 12:25 UTC) in 479 ms with HTTP 403.
Checking Codeforces now…
Sending a request from our server.
Codeforces API uptime history
- Uptime
- 2 checks so far
- Last check
- Oct 24, 2026, 12:25 UTC
- Response
- 479 ms · HTTP 403
- Last up
- Now
We check Codeforces's listed URL (https://codeforces.com/apiHelp) once a day. History started when Codeforces was first checked, so new entries show fewer than 30 days.
What does HTTP 403 mean? Read the 403 explainer.
Codeforces API not working for you?
- Codeforces 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.
- If calls fail only in the browser with a CORS error, Codeforces may not allow cross-origin requests. 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.
Programming APIs up at their last check
- 1
Mintlify API
Online · 1227 msFor programmatically generating documentation for code.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS - 2
Judge0 CE API
Online · 596 msOnline code execution system. A free programming API by Judge0 CE.
- HTTPS
apiKeyHTTPSCORS ? - 3
Hackerearth API
Online · 1521 msFor compiling and running code in several languages.
- HTTPS
apiKeyHTTPSCORS ?
Codeforces API status FAQ
Is Codeforces API down right now?
Codeforces answered our last daily check (Oct 24, 2026, 12:25 UTC) in 479 ms with HTTP 403. This page also runs a live check from our server when you open it, so you can see whether Codeforces is responding at this moment.
How do you check whether Codeforces API is up?
Once a day our checker requests Codeforces's listed URL (https://codeforces.com/apiHelp) 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 Codeforces API is down?
Free Programming APIs that were up at their last check include Mintlify, Judge0 CE, Hackerearth. See the full list of Codeforces alternatives for a comparison.
Why does Codeforces API work for others but not for me?
Codeforces 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. If calls fail only in the browser with a CORS error, Codeforces may not allow cross-origin requests. Call it from your server instead.