Send Fax

documented

Submit a fax for sending from an extension number.

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

Input

recipient*

Recipient phone number

+15551234567

faxResolution

Fax resolution

High

coverPageText

Cover page text

This is a demo fax

sendTime

Scheduled send time (ISO 8601)

2026-02-18T12:00:00Z

attachmentPath*

Path to attachment file

/path/to/fax.pdf

attachmentFilename

Attachment filename

fax.pdf

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