Identify the operator
An employee reviewing drafts needs a different workflow from a customer expecting order data inside your website. Build an integration when you need control over the experience, records and actions, rather than because a custom application sounds more advanced.
Compare two tasks
A marketing proposal can begin as a reviewed draft. Updating a CRM stage requires identity checks, permissions, an audit trail and error handling. In that workflow the model is one component, while business rules remain explicit application logic.
Count the full cost
Include setup, review and support alongside subscription or API costs. Keep integration secrets out of browsers. Pilot one task for a defined period and measure time saved and output quality before expanding the approach across departments.