213976's blog

By 213976, history, 13 months ago, In English

Codeforces API is down more than 4 hours now.

Anybody know the reason?

UPD : API is Up now

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13 months ago, # |
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Because codeforces uses cloudflare to prevent DDos attack now. All connections to codeforces need to pass a cloudflare wall and api users can not pass this wall easily due to the recaptcha v3 and the 5s wait.