The users need to have an "API Key" as well as a "Ticket ID" for accessing the Zoho API. The API key will be used to track usage and the Ticket ID is required for authenticating the user for a particular Zoho service.
Users can request for the API Key by registering themselves at the below given url. Once we receive the request, we will send the API Key to the User's Email ID. Please do not distribute or use the key for creating multiple services (you should request for an API key for each individual service that you plan to create). Any violations will result in the cancellation of the API Key. Getting the API Key is a onetime process.