# Managing API keys ### API Secret Key

Upon successful registration, an API secret key will be generated for your app. You may use this API secret key to generate access token to access all SSI APIs. Read more about it in [authentication](https://docs.hypersign.id/hypersign-ssi/api-doc/authentication) section. {% hint style="warning" %} Make sure to copy and save API secret key securely. If lost, this key can not be recovered. However, you can regenerate a new one. {% endhint %}