The POST /{{envID}}/flowExecutions/{{flowExecutionID}} endpoint along with a custom content type specifies the action required by the flow definition step type. For example, to complete the USER_ACCOUNT_VERIFY step, a request to the POST /flowExecutions/{{flowExecutionID}} endpoint specifies the application/vnd.pingidentity.user.verify+json custom media type as the HTTP Content-Type to initiate an action that sends a verification code to the user to verify the account.

For information about flow definition step actions and step schema metadata, see Flow Definition Steps.