Item related resources. includes: items, price_lists, special_price_lists, item_prices, inventory, item dimensions1, item dimensions2.

Account related resources. (an Account is defined by the Type Field and usually represents a Customer/Vendor/Warehouse). includes: accounts, contacts, account_users, account_catalogs, account_inventory.

Transaction related resources. (a Transaction is defined by the Type Field and usually represents a Sales Order/Sales Quote/Invoice/Credit Note/Purchase Order)

Activity resources. (an Activity is defined by the Type Field and usually represents a CRM/Merchandising Activity)

Customization resources. includes: user_defined_tables resources. (user defined fields are documented separately inside each relevant resource)

Bulk Upload related resources. includes: bulk upload of resource data using bulk/{resource_name} , and bulk/jobinfo to get bulk upload Async Job status information.

Company related resource, includes: users, apitoken (Private Authentication API Token)