I found this option in sendgrid mail platform for adding multiple email IDs to a list. It's like :
curl -d 'api_user=your_sendgrid_username&api_key=your_sendgrid_password&list=my_list&data[]={"email":"address1@domain.com","name":"contactName1"}&data[]={"email":"address2@domain.com","name":"contactName2"}' https://sendgrid.com/api/newsletter/lists/email/add.json
Now how can I use this along with PHP curl ?
I am having doubt in adding the data fields and read somewhere that -d is the switch for POST. But for sendgrid almost all the api requests are gets.