Note: I made this as a proof of concept, if you want to contribute please see my newer version which is much better designed: https://github.com/Eli-Chandler/KrunkerAPIV2

You can sign up for capsolver here, this is what we use to solve the hcaptcha challenge: https://dashboard.capsolver.com/passport/register?inviteCode=hnpifE3ejpcE

Usage example:

To find unused usernames:

from krunkerwebsocketAPI import KrunkerWebSocket
import asyncio

async def main():
    usernames_to_check = ['sfkjadhsfalskas123', '.Floow', 'Sidney']
    capsolver_api_key = os.environ.get('CAPSOLVER_API_KEY')
    kws = KrunkerWebSocket(capsolver_api_key) # Optional but highly reccomended, otherwise you will need to solve the captcha in browser intermittently
    await kws.start()
    for username in usernames_to_check:
        response = await kws.request_profile(username)
        if not response:
            print(username, 'is available!')

if __name__ == '__main__': # Just some asyncio boilerplate
    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
    asyncio.run(main())

output: 'sfkjadhsfalskas123 is available!'