Salesforce UI API
The Salesforce UI API provides a comprehensive REST interface for building UIs that work with Salesforce metadata and data. It returns layout information, picklist values, list views, record data, and object metadata that Lightning components rely on.
Documentation
Documentation
https://developer.salesforce.com/docs/atlas.en-us.uiapi.meta/uiapi/
GettingStarted
https://developer.salesforce.com/docs/atlas.en-us.uiapi.meta/uiapi/ui_api_get_started.htm
APIReference
https://developer.salesforce.com/docs/atlas.en-us.uiapi.meta/uiapi/ui_api_resources_list.htm