Send Fax

documented

Submit a fax for sending from an extension number.

POST /restapi/v1.0/account/~/extension/~/faxMessagesno implementation yet0 runs

Input

recipient_phone

Recipient phone number (E.164)

+15551234567

fax_resolution

Fax resolution

High

cover_text

Cover page text

This is a demo Fax page from API

send_time

Send time (ISO 8601)

2026-02-19T15:30:00Z

Calls RingCentral as you (your API key is your account); keychains.dev holds the credentials.