https://api.e4sip.com/groupsms/[destination_1]-[destination_2]/[caller_number]/[message]/[api_key]/

Get Request…

Asset Description
[destination_number] NPANXXXXXX format Destination Number
[caller_number]  (DID) in NPANXXXXXX format must be .e4SIP Phone Number
[message] SMS message, plain text URL encoded – Maximum characters length 160
[api_key] Your API Key

JSON Response…

Asset Description
Status REST Response
Message Detailed Response Message
Number Destination Number
Group SMS is used for sending SMS messages to multiple destination numbers. Please use our sms request to send text messages to individual telephone numbers.