Fax from C#

Need to fax from C#? Access the InterFAX internet fax service through the developer API and send faxes programmatically with just a few lines of code and no installations.

Sign up now for our free developer program and receive immediate access to the Interfax Fax API. No hardware installations, no software setup, no phone lines to order.

The InterFAX service accepts files in all popular document formats - including MS Word, PDF, plain text ASCII, HTML, URL, and others - and sends them to a fax number you specify.

Quick-jump to Web Service code samples for C#

Choose Your Fax API: Web Service or Email Interface

All interfaces support basic fax sending for quick and simple faxing, as well as advanced fax API functionality such as multiple destinations, deferred transmission, document resolution, and more...

Choose Your API Fax:

Web Service Send faxes from any standards-compliant .NET, SOAP or other WSDL client. View Sample Code Online Documentation Discussion Forum Features: Receive submission token Real-time status query Multiple Recipients Multiple Documents Deferred Transmission

Email Interface Send faxes from any standards-compliant .NET, SOAP or other WSDL client. View Sample Code Online Documentation Discussion Forum Features: Receive submission token Real-time status query Multiple Recipients Multiple Documents Deferred Transmission

ActiveX COM Object Send faxes from any standards-compliant .NET, SOAP or other WSDL client. View Sample Code Online Documentation Discussion Forum Features: Receive submission token Real-time status query Multiple Recipients Multiple Documents Deferred Transmission