Captcha setup for Farmer v5, WinterHub and Yummy Auto

All three of these already notice a Roblox FunCaptcha and stop the account rather than failing silently. What they are missing is somewhere to send it. Each one has a field for a third-party solver, and filling that field in is the whole integration. Your own setup URL, with your key and priority already in it, is on the Tools tab of your API key page once you are signed in.

Farmer v5

Open the Captcha Webhook panel, paste the setup URL into Webhook URL, and leave the rest of the panel as it is, cooldown included. The key is already part of the URL, which is why there is no separate key field to fill and why that URL is worth treating like a password: anyone holding it can spend your balance. Farmer then posts the account and its cookie the moment it hits a captcha, and one solve is queued per post.

WinterHub

Open the CAPTCHA panel, turn on Use Custom Solver and Auto Solve Captcha, then paste the setup URL into Custom Solver URL. Leave the Custom Solver API Key field blank, because the key is already embedded in the URL and a second copy in that field is one more place for it to leak. The endpoint is a drop-in for WinterHub's own solver and answers the same contract, waiting up to ninety seconds for a result rather than making the tool poll.

Yummy Auto

Copy the setup URL into the Third Party Solve Captcha URL field in config.json, save, and restart. Two settings catch people out. Roblox only re-checks a captcha when the account rejoins, so leave a rejoin interval set or accounts sit there solved and parked. And keep Change Account off, because with it on the account is filed away as unsolved and never retried. Treat config.json the way you would treat the key itself.

Any other rejoin tool

Anything that speaks the WinterHub Custom Solver contract works without us having heard of it, Farmsync included: it is the same URL in the same kind of field. If your tool has no solver field but can call a webhook, use the captcha webhook instead, which takes the account and its cookie and queues one solve. Either way you are charged per solve, a skipped duplicate is refunded, and the reply always arrives as a plain success or retry status rather than an error page your tool has to parse.

Source: Arkose Labs, the vendor behind the FunCaptcha challenge Roblox serves.