Minecraft Server Captchas and What Bots Can Solve

Many servers ask new players to prove they are human before they can move or chat. The check usually appears right after joining, and a bot that ignores it gets kicked or stays frozen.

The common kinds

• A math question in chat, such as "what is 14 + 9?"
• A message that tells you to type a code or run a command like /captcha abc123
• A map or image you read and type back
• A link to a website with a login code

What the MineBots solver handles

The solver reads chat lines. It answers simple math questions and sends the code or command that a message asks for, after a short random delay. It answers once every few seconds at most so it does not spam the chat.

What it does not handle

Map captchas, image captchas and website verification need a person or an image-recognition service. The bot will not guess at those, so a server that uses them is better handled by joining once by hand with the account and letting the server remember it.

Tips

• Turn on auto-login too if the server uses a login plugin
• Test on a server you control before relying on it elsewhere
• Servers change their messages, so check the console after an update

Why servers use captchas

They slow down floods of fake accounts, which is a real problem for small servers. The check is meant for bot attacks, not for a single AFK alt, so be careful to use bots only where the owner allows it.

When the solver fails

Read the console to see the exact question. If it is an image or map, join once by hand. If the wording is new, the server may have changed its message and the solver needs an update.