From their site: The Zoho Application Programming Interface (API) lets anyone write their own program to pull Zoho Writer & Zoho Sheet data and work with it in many possible ways. There's a list of API methods for both Zoho Writer and Zoho Sheet available to you. To get the list of API methods for the above Zoho services please click on the link mentioned below: * Zoho Writer API -- Lets client applications view, list, create/edit and perform a host of useful operations on their documents. * Zoho Sheet API -- Lets you to view, list, modify/save, and rename the workbook available in your Zoho Sheet account. Additional applications now include Zoho show, viewer, creator, planner, reports, projects, meeting, and invoice.