Create an API Only User Role create-an-api-only-user-role
If you want to integrate with Marketo via the REST API, the best practice is to assign a user the API Only role and then create a custom service for use with REST API. Here鈥檚 how to create the API only user role.
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Go to the Admin area.
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Click Users & Roles.
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Click the Roles tab and then New Role.
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Enter a Role Name, select the API access Permissions you want to give, and click Create.