https://api.e4sip.com/sms/[destination_number]/[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

JSON Response…

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
SMS is intended for a single destination telephone number. Please use our group sms request to send text messages to multiple destination telephone numbers.