We recently announced the availability of REST APIs for Zoho Writer, Sheet and Show. Today, we have added REST API for Zoho Planner as well. The functionality & working of this API is similar to those of Writer/Sheet/Show. The Zoho Planner API allows you to get, create, update ToDo lists and do a lot more as well, all from inside your web application. Check out the new Zoho Planner API. If you need help in building a mashup using our API, do write to us at feedback(at)zohoplanner.com.