For the Twilio SMS channel, you can use the MediaUrl parameter in the response to deliver an image. Let’s see an example of how to send an outbound message that includes an image and a text message.

Sample API CURL Script

curl -XPOST https://api.twilio.com/2010-04-01/Accounts/ACXXXXXXXXXXXXXXXX/Messages.json \
--data-urlencode "To=+13105555555" \
--data-urlencode "From=+12125551234" \
--data-urlencode "MediaUrl=https://demo.twilio.com/owl.png" \
--data-urlencode "Body=Hello, here is how it looks!" \
-u 'ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:your_auth_token'

Related Links 

• Adding the Twilio SMS Channel
• Simple Example for Sending Programmable SMS Text or Picture Messages (Twilio Doc)