Fax API (3.0)
This document provides a detailed user guide and reference documentation on the Fax REST API.
If you have questions please contact us via our support portal and a team member will be happy to assist.
You must create an account on our support portal if you do not have one.
Sinch has a global server that will route your call to the appropriate geography region automatically:
https://fax.api.sinch.com/If you have enabled storage, we retain fax logs and media for 13 months which you can access via the API. After 13 months, media and logs are deleted.
Find error codes and explanations here.
You can configure your service to use webhooks to send a request to you when faxes arrive or complete on your account.
Note: When webhooks with Basic authentication credentials are shown in GET requests, the credentials are masked with `***`` symbols. It is not possible to retrieve previously-set credentials through the API.