How to recognize captcha Vkontakte through anti-captcha.com?

Question

PHP

Hello.
Contact returns an error with a link to the captcha

{"error":"need_captcha","captcha_sid":"854844498568","captcha_img":"http:\/\/api.vk.com\/captcha.php?sid=854844498568&s=1"}

Who will tell you how to drive the link to the captcha through anti-captcha.com? It just does not accept a link like api.vk.com/captcha.php?sid=854844498568 , it asks for the file.
The documentation also says that how can a base64 body be sent instead of a file, but I also can’t figure it out, it says that it can’t recognize the extension

Answer 1

I opened your link and looked at the source code, there is already this picture in base64
Sources tab in Developer Tools (F12 Chrome)
See how it is implemented here - https://github.com/korobitsyn/VKOpenRobot/tree/mas...

Answer 2

Have you tried something similar?
https://chrome.google.com/webstore/detail/anticapt...
It immediately solves the page, you don't have to do anything, it's all by itself.