Don't check more then 100 at a time, and you need an API key which you can get 100% free at: https://developer.riotgames.com/
it works quite well =)
https://www.leagueac...op.com/checker/
PS: Accounts are stored in database so you can easily retrieve them using the accounts tab, these accounts are 100% private and yours, and will not be used/shared with a third-party! Or you can alternatively opt-out and click don't store in database, which will trigger this (for those who understand php):
Update:
Removed the need for api keys thanks to: https://www.nulled.t...pi-for-scraper/