This is the public Twilio REST API.
curl \ -u "$API_USER:$API_PASS" \ https://chat.twilio.com/v2/Services
curl \ -u "$API_USER:$API_PASS" \ https://chat.twilio.com/v2/Credentials
curl \
-u "$API_USER:$API_PASS" \
https://chat.twilio.com/v2/Services/{Sid}