Which adapter would be best to use if you need to pull data from an external REST API?

The most suitable choice for pulling data from an external REST API is the Custom Adapter for Salesforce Connect. This adapter allows for the creation of tailored connections to any external system that supports RESTful APIs. Since custom adapters are flexible, they can interact with various endpoints, accommodate specific authentication methods, and handle unique data structures.

Using a custom adapter ensures that you can implement the specific logic required to extract and transform the data from the external API effectively, rather than relying on predefined protocols. This level of customization is crucial when working with diverse external services, each likely having different requirements and data formats.

The other options have specific use cases. For instance, the OData 4.0 Adapter is suited for integrating with data sources that expose their data via OData protocol, not REST APIs. The Salesforce Connect Adapter for Amazon DynamoDB is tailored for connecting to Amazon's NoSQL database and wouldn't apply to general REST API needs. The Cross-Org Adapter is focused on working with data across different Salesforce orgs, which does not align with pulling data from external REST sources.