I need a Web service that be able to change BIP39 words to other bit coin addresses.
This is
NOT something that should be done using an online service!
The "BIP39 words" are a mnemonic used to derive the BIP39 seed... from this seed, ALL of your private keys, public keys and addresses can be derived.
Putting your BIP39 seed mnemonic into an online service, basically compromises your entire wallet.
That website will allow you to enter the words and get the public keys... it just isn't provided via an API etc... you have to manually enter the words into the BIP39 mnemonic box and your addresses are displayed at the bottom of the page.
It is advisable to download the page and run it "offline" to avoid compromising your seed mnemonic and wallet keys. Instructions are on the github repo:
https://github.com/iancoleman/bip39#standalone-offline-versionIt is a single, self-contained .html file that you can open locally and provides exactly the same functionality as the online website.