I am attempting to make a composite API request to create both Account and child records in Salesforce in my sandbox account (Enterprise org).
When making the request I get the following error:
[
{
"message": "Composite Api is not enabled.",
"errorCode": "API_DISABLED_FOR_ORG"
}
]
I can't find anything related to the "Composite API" in the Setup > Manage Users > Profiles > System Permissions .
Can someone tell me how I can enable this?