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Bot to verify using captchas images, if a new user, who join a group, is human.

What can do this bot?Bot to verify if a new user, who join a group, is human. The Bot send a captcha for each new user, and kick any of them that can't solve the captcha in a specified time.

Hello, I am a Bot that send an image captcha for each new user who joins a group, and kick anyone that can't solve the captcha within a specified time.

If a user tries to join the group 5 times in a row and never solves the captcha, I will assume that this "user" is a bot, and it will be banned. Also, any message that contains a URL sent by a new "user" before the captcha is completed, will be considered spam and will be deleted.

Remember to give me administration privileges to kick-ban users and remove messages.

Check /help command for more information about my usage.

Am I useful? Check /about command and consider making a donation to keep me active.

Bot Commands

A command must always start with the '/' symbol.

Shows the initial information about the bot.
Shows the help information.
Shows the actual message. Information about all the available commands and their description.
Allows to change the language of the bot messages. Actual available languages: en (english) - es (spanish) - pt_br (portuguese from Brazil).
Allows to change the time available to resolve a captcha.
Allows to change captcha difficulty level (from 1 to 5).
Allows to change captcha characters mode (nums: just numbers, hex: numbers and A-F chars, ascii: numbers and A-Z chars).
Enable the captcha protection of the group.
Disable the captcha protection of the group.
Show the version of the Bot.
Show about info.
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