Note: This question is part of a series of questions that present the same scenario.

The requirement does not make a custom connector necessary. A one-time, non-reusable REST request can be implemented with an appropriate HTTP action by supplying the endpoint, method, authentication, headers, query parameters, and request body. The response can then be parsed or referenced in that same flow. A custom connector is most valuable when an API must be exposed as reusable, named operations across several flows or apps, when makers need a shared schema and authentication definition, or when governance requires a managed API abstraction. The scenario explicitly states that reuse is not required, so building and maintaining that abstraction would be unnecessary. The designer must still confirm that the HTTP action supports the service’s authentication method, that licensing is available, and that environment data policies allow the endpoint. Those implementation constraints do not change the connector decision given. The Study Guide objective is “evaluate and recommend connectors,” which requires distinguishing a direct HTTP call from a reusable custom connector. Since the proposed one-off call can be made natively, the answer is No.

Study Guide reference/topic: “Create cloud flows — Evaluate and recommend connectors.” AB-410 Study Guide | Microsoft Learn technical reference