Send fax callback

When Phaxio is done processing your fax, it will post the job’s status to your send fax callback URL, if one is available. You can set up a send callback URL on the callbacks page in the web console, or specify one directly in your send API call.

If you’ve specified a global callback URL on the callbacks page and also make a send API call with a callback url specified, the API call’s URL will override the global one.

The callback HTTP request is a multipart POST and should be processed like a form submission.

If a callback fails, we will automatically retry the callback up to 16 times. There will be a backoff before each retry, which increases as follows:

Retry No.	Backoff
1	5 minutes
2	10 minutes
3	20 minutes
4	30 minutes
5-16	6 hours

Request Parameters

Name	Type	Description
success	boolean	Was the fax sent successfully?
is_test	boolean	Is this callback as a result of a test call?
direction	string	The direction of the fax (in this case, 'sent'). Useful if you use the same callback URL for both sent and receive confirmations.
fax	Fax Object	The job's fax object.
message	string	The error message if the fax was unsuccessful.