The legacy QuickBooks Time API is available for legacy time-tracking solutions. With it you can build time-tracking solutions that simplify workflows and save customers time and money. Based on REST principles, the API is easy to use and allows you to query metadata about your account, users, jobcodes, timesheets, GPS points, and custom fields. You can also create timesheets, users, and jobcodes. For complete information, see Time API (Legacy).