# Authentication

All APIs require an authentication token. This token is a secret key that is specific to your app and will be provided to you. Please keep the key secure, as it will allow the holder to [create new wallets](https://docs.nftyverse.com/apis/nft-wallets) and [transfer NFTs](https://docs.nftyverse.com/apis/transfers) out of wallets as well.

You will need to pass the authentication token in the `"Authorization"` header when making an API call.