REST API Developer Guide
jNote: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.
sObject Collections
Executes actions on multiple records in one request. Use sObject Collections to reduce the number of round-trips between the client and server. The response bodies
and HTTP statuses of the requests are returned in a single response body. The entire request counts as a single call toward your API limits. This resource is available in API version 42.0 and
later.
The parameters, request body, and response body of an sObject Collections request depend on the HTTP method. For details, see the specific operation.