Register APIs

1. Go to Dashboard > Applications > APIs, and select + Create API.
2. Provide the following information for your API, and click Create:

   Field	Description	Example
   Name	A friendly name for the API. Does not affect any functionality.	yourDomain
   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 and 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.	https://{yourDomain}
   JSON Web Token (JWT) Profile	The profile determines the format of the access tokens issued for the API. The available values are Auth0 and RFC 9068. To learn more, read Access Token Profiles.	Auth0
   JSON Web Token (JWT) Signing Algorithm	The algorithm to sign the access tokens with. The available values are HS256, PS256, RS256. If you select RS256, the token will be signed with the tenant’s private key.	RS256
   Access Policy for Applications within user flow	Allow applications to access the API on the user’s behalf. To learn more read, API Access Policies for Applications.	Allow via client-grant
   Access Policy for Applications within client flows	Allow Machine to Machine applications to access the API. To learn more read, API Access Policies for Applications.	Allow via client-grant

3. 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.
   
   If you are creating a new custom API and also have Single-Page or Native applications in your tenant, you must enable Role-based Access Control (RBAC) to keep users logged in to these applications from generating an access token for your API that does not consider scopes. To learn how to enable RBAC for your API, read Enable Role-Based Access Control for APIs.

• 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.

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Learn more

• API Settings
• Token Best Practices
• Which OAuth 2.0 Flow Should I Use?