Zoho Creator API now supports the Authentication Token for all API calls. This is a permanent token and will replace the API key and ticket which has to be regenerated every 7 days.
Existing Zoho Creator API users can generate the Authentication token and replace the API key and Ticket with the generated token. The API calls will also work with API Key and Ticket but this will be deprecated after 3 months. We will keep you posted on the exact date.
Please refer this help document to learn more about the usage of the Auth Token and to replace the existing key and ticket with the Auth token.
Zoho Creator charting functionality helps you to quickly and easily
analyze data in a visual format using a variety of graph types. To
create charts with data from multiple ZC forms or to display grouped
data, you can use the chart API supported by Zoho Sheet. The Sample
Application named "Student Management"
demonstrates this functionality. In this application, we have defined a
function called "getChartUrl" (you can see the function used in the
application under the Script -> Functions tab in edit mode), using which the required data is dynamically submitted to Zoho Sheet API, which creates the required chart as an image.