REST API Endpoint to extract data from cube view

Yes. You can use that copy paste in the body of the API call.

{
    "BaseWebServerUrl": "https://contoso.onestreamcloud.com/OneStreamWeb",
    "ApplicationName": "GolfStream_v37",
    "CubeViewName": "Gross Margin",
    "DataTablePerCubeViewRow": false,
    "ResultDataTableName": "ResultDataTableNames",
    "CustomSubstVarsAsCommaSeparatedPairs": "",
    "CubeViewDataTableOptions": {
				"IncludeTitle": false,
				"IncludeHeaderLeftLabel1" : true,
				"IncludeHeaderLeftLabel2" : true,
				"IncludeHeaderLeftLabel3" : true,
				"IncludeHeaderLeftLabel4" : true,
				"IncludeHeaderCenterLabel1" : true,
				"IncludeHeaderCenterLabel2" : true,
				"IncludeHeaderCenterLabel3" : true,
				"IncludeHeaderCenterLabel4" : true,
				"IncludeHeaderRightLabel1" : true,
				"IncludeHeaderRightLabel2" : true,
				"IncludeHeaderRightLabel3" : true,
				"IncludeHeaderRightLabel4" : true,
				"IncludePovCube" : true,
				"IncludePovEntity" : true,
				"IncludePovParent" : true,
				"IncludePovCons" : true,
				"IncludePovScenario" : true,
				"IncludePovTime" : true,
				"IncludePovView" : true,
				"IncludePovAccount" : true,
				"IncludePovFlow" : true,
				"IncludePovOrigin" : true,
				"IncludePovIC" : true,
				"IncludePovUD1" : true,
				"IncludePovUD2" : true,
				"IncludePovUD3" : true,
				"IncludePovUD4" : true,
				"IncludePovUD5" : true,
				"IncludePovUD6" : true,
				"IncludePovUD7" : true,
				"IncludePovUD8" : true,
				"IncludeMemberDetails": true,
				"IncludeRowNavigationLink" : true,
				"IncludeHasDataStatus" : true,
				"IncludeAnnotation" : true,
				"IncludeAssumptions" : true,
				"IncludeAuditComment" : true,
				"IncludeFootnote" : true,
				"IncludeVarianceExplanation" : true
				}
}

What I meant is: check the definition of your cubeview for things like the following:

That |WFYear| variable cannot be resolved automatically when executing the view from REST. So you have to pass the required value with the property "CustomSubstVarsAsCommaSeparatedPairs": [comma separated list of key value pairs as substitution variables with the following format: "VariableName1=[VariableValue1],VariableName2= [VariableValue2],..."]

In addition, make sure that all dimensions have a member specified either in the main POV or in row/columns, because via REST there won't be a UserPOV to fallback on.