What mean "__cf_chl_jschl_tk__"?

[Mainin33]

I see this code few month "__cf_chl_jschl_tk__" while trying to access some sites.
Does anyone know what it is?

I search around and seems to be from CloudFlare. Is it a browser verification?

 

[b1u3ey3s]

cloudflare the parameters are __cf_chl_jschl_tk__ and __cf_chl_captcha_tk__ are add to the url after a user successfully passes a: a IUAM challenge
https://gerardnico.com/web/security/badbot section 4.2: challange
Hope i help you

 

[Mainin33]

That is what i was looking for
Thnx

 

[Sharky]

it's after a successful response thing