post https://api.phone.com/v4/accounts//extensions//messages
This service is used to send a message for extension.
This API endpoint is designated for Person to Person (P2P) communications. Improper use for marketing type purposes or Application to Person (A2P) will cause upstream cellular companies to block the “From” number for SMS use. If you plan to use this endpoint for A2P or A2A applications that might also entail high volume, i.e., above the FREE limits set by the Phone.com plan, please contact our API support team at [email protected] to discuss other options.