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Is Judge0 CE API down?

Current status, daily uptime history and troubleshooting for the Judge0 CE API (Programming).

No, Judge0 CE is up

Judge0 CE answered our last daily check (Oct 24, 2026, 12:25 UTC) in 596 ms with HTTP 200.

Checking Judge0 CE now…

Sending a request from our server.

Judge0 CE API uptime history

30 days agoLatest check
Uptime
2 checks so far
Last check
Oct 24, 2026, 12:25 UTC
Response
596 ms · HTTP 200
Last up
Now

We check Judge0 CE's listed URL (https://ce.judge0.com/) once a day. History started when Judge0 CE was first checked, so new entries show fewer than 30 days.

Judge0 CE API not working for you?

  1. Judge0 CE 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.
  2. A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header.
  3. If calls fail only in the browser with a CORS error, Judge0 CE may not allow cross-origin requests. Call it from your server instead.
  4. If it works from one network but not another, check firewalls, VPNs and regional blocks.
  5. 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. 1Mintlify logo

    Mintlify API

    Online · 1227 ms

    For programmatically generating documentation for code.

    • Callable from the browser (CORS)
    • HTTPS
    apiKeyHTTPSCORS
  2. 2Codeforces logo

    Codeforces API

    Online · 479 ms

    Get access to Codeforces data.

    • HTTPS
    apiKeyHTTPSCORS ?
  3. 3Hackerearth logo

    Hackerearth API

    Online · 1521 ms

    For compiling and running code in several languages.

    • HTTPS
    apiKeyHTTPSCORS ?

Compare all Judge0 CE alternatives · APIs down right now

Judge0 CE API status FAQ

Is Judge0 CE API down right now?

Judge0 CE answered our last daily check (Oct 24, 2026, 12:25 UTC) in 596 ms with HTTP 200. This page also runs a live check from our server when you open it, so you can see whether Judge0 CE is responding at this moment.

How do you check whether Judge0 CE API is up?

Once a day our checker requests Judge0 CE's listed URL (https://ce.judge0.com/) 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 Judge0 CE API is down?

Free Programming APIs that were up at their last check include Mintlify, Codeforces, Hackerearth. See the full list of Judge0 CE alternatives for a comparison.

Why does Judge0 CE API work for others but not for me?

Judge0 CE 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, Judge0 CE may not allow cross-origin requests. Call it from your server instead.