What is a good use case for External Services in flows?

External Services allows administrators to declaratively call external APIs in a flow. A common use case is to validate or enrich data using external systems during the flow execution.

D. Correct — Address validation using an external API during record creation or update is a perfect example.

Incorrect Options:

A. Bulk updates are better handled via data integrations or Apex.

B. External Services is not designed for batch or asynchronous display processes.

C. Embedding external UI components is not the role of External Services (would require an iframe or Lightning Web Component).

Reference Extracts from Salesforce Process Automation Study Guide:

“Use External Services in Flows to invoke registered APIs for tasks like validation or enrichment of user-entered data.”

“External Services must be registered via schema (OpenAPI 2.0) before being usable in Flow Builder.”

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