The API name has changed from Lightning API to User Interface API. The new name tells you what to build with the API—UI for custom Salesforce apps. The User Interface API responses are designed to give you everything you need to display Salesforce records.
The User Interface API base URL has changed from /lapi to /ui-api.
To get metadata and data to display a record, your code makes a simple HTTP request to a resource.
Behind the scenes, Salesforce does the heavy lifting.
- Checks field-level security settings, sharing settings, and perms.
- Makes SOQL queries to get record data.
- Gets object metadata and theme information.
- Gets layout information.