RingCentral provides a fax API that allows sending faxes programmatically through a HTTP POST request. The API supports sending faxes with options like cover pages, resolution, and attachments. There are multiple ways to send faxes through RingCentral, including online, by email, or using their desktop and mobile apps. The fax API returns status updates and supports disabling cover pages.

1. Anirban Sen Chowdhary
RingCentral Fax

2. RingCentral provides Fax service and feature along with it's other
services like SMS, Call etc. RingCentral provides Send Fax API which is
based on a HTTP POST request with multipart/form-data body through
which un-rendered fax data is passed to the network. Resend FAX can
be done by the API if sending failed.
The FAX url is
/restapi/v1.0/account/accountId/extension/extensionId/fax

4. Following are the input parameters of the API:
• Username: It is the user phone number and extension
• Password: It is the user password
• Recipient: Number of recipient is mandatory, recipient name is optional.
• Coverpage: Name of a cover page. Should correspond to one of the cover
pages installed on rendering server. Only one coverpage parameter in
request should exists.
• Coverpagetext: Cover page text, entered by the fax sender and printed on
the cover page. Maximum length is 1024 symbols. If not specified or its
value is empty then default .
• Resolution: It is the resolution in which fax will be sent to recipients. 'High'
for black and white image scanned at 200 dpi, 'Low' for black and white
image scanned at 100 dpi .
• Attachment: Original document file name must be passed in the filename
field of the body-part header.

5. The FAX feature is available on both the desktop and mobile versions of
the application.
There are actually 5 ways to send FAX:
• Sending fax online
• Sending fax by email
• Sending a fax using RingCentral for Desktop.
• Send a fax from Microsoft® 5 applications
• Send a fax using the RingCentral mobile app

6. We can also directly use RingCentral for sending FAX to a particular
number.
RingCentral FAX are flexible, secured with FAX log available.
The time when you are sending a fax message through the Fax API, you
can check the status of this transmission. To disable the coverpage
feature of API, set the CoverIndex to 0