1) Login to the https://services.mgov.gov.in --> click on Manage Account --> Generate Key. 2) Now on Generate Secure Key page click on "Generate New Key" Button. 3) After step 2, a key will be displayed in secure key column on the same page. Store the secure key securely as the Secure Key will be used for sending SMS through API. Do not share the Secure key and password with anyone else. 4) Now refer the the integration code links below for using the secure key while accessing API.