Please refer below API.
1. If you need entity data(All the records) then refer below API.
GET [Organization URL]/api/data/v9.2/accounts
2. If you need specific record information in specific entity then provide the GUID in 2nd API.
GET [Organization URL]/api/data/v9.2/accounts(b4cea450-cb0c-ea11-a813-000d3a1b1223)
3. if you need specific record information in specific entity(with limited fields) then provide the GUID in 3nd API as well as the logical name of the fields.
GET [Organization URL]/api/data/v9.2/accounts(b4cea450-cb0c-ea11-a813-000d3a1b1223)?$select=websiteurl,name
docs.microsoft.com/.../query-data-web-api
Thank you,
Amit katariya