You can use
ForkMyCoins. It can check 20 addresses at the time as long as they don't have more than 50 transactions.
I can't understand exactly what this website does. Can you explain how does it work? And what is the point of airdrop or bounty?
that website is just to help people know if they have a forked coin and if you have a forked coin so you can able to redeem it
How to claim forked coins?
The most common method to claim forked coins is to use your private key to send the forked coins to a new address on the forked chain. To obtain a new address you will either use a wallet compatible with this fork, or use an address provided by an exchange. Do not install the first wallet you find, document yourself and seek advice from the community to avoid installing a misbehaving wallet. Also, remember that claiming comes with risks!
If you feel comfortable enough claiming the coins by yourself, you can make use of Ymgve's or Ayms' scripts. After searching for coins on our site, open the Advanced report to find the transaction IDs and indexes needed to claim the forks.
If that's a bit too complicated, we suggest that you get in touch with Walleting Services as they offer an automated coin claiming service for a fee. Note that this also comes with some risks. Alternatively, some apps have been known to be used to redeem forked coins, namely Coinomi and Bitpie.