Cerber is a Telegram bot that protects channels and groups from spam bots and fake accounts by providing a one-tap verification in multiple languages. It works with Telegram join requests, including guardian mode, automatically declining bots and unanswered requests after 24 hours. The bot is free for up to 500 join requests per month and offers unlimited checks for a monthly fee. Cerber requires only the "Add members" admin right and does not read member messages.
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