Authorization

Fast2SMS expects API Key to be included in all API requests to the server in a header.

Get your API Authorization Key from Fast2SMS Dev API section for FREE, which you need to add in each API request as follows:

For GET requests:

Include the API Key in the request header.

GET https://www.fast2sms.com/dev/bulkV2?route=q&message=YOUR_MESSAGE&numbers=9999999999
Authorization: YOUR_API_KEY

For POST requests:

Include the API Key in the request header.

POST /dev/bulkV2
Authorization: YOUR_API_KEY

You must replace YOUR_API_KEY with your Fast2SMS account API Authorization Key.

Sign up for API Key