Go to Dashboard > Applications > APIs, and select + Create API.
Provide the following information for your API, and click Create:
Field Description Name A friendly name for the API. Does not affect any functionality. Identifier A unique identifier for the API. Auth0 recommends using a URL. Auth0 does differentiate between URLs that include the last forward slash. For example,
https://example.com/are two different identifiers. The URL does not have to be a publicly available URL. Auth0 will not call your API. This value cannot be modified afterwards.
Signing Algorithm The algorithm to sign the tokens with. The available values are HS256 and RS256. When selecting RS256 the token will be signed with the tenant's private key.
Make the implementation changes to your API that are described in the QuickStart. These changes consist of choosing a JWT library from a predefined list and configuring this library to validate the access tokens in your API.
The other available Dashboard views for your API are:
Settings: Lists the settings for your API. Some are editable. Here you can change the token expiration time and enable offline access (this way Auth0 will allow your applications to ask for refresh tokens for this API).
Scopes: Define the scopes for this API by setting a name and a description.
Machine to Machine Applications: Lists all applications for which the Client Credentials grant is enabled. By default, this grant is enabled for regular web applications and machine-to-machine applications. You can authorize any of these applications to request access tokens for your API. Optionally, you can select a subset of the defined scopes to limit your authorized application's access.
Test: Execute a sample client credentials flow with any of your authorized applications to check that everything is working as expected.