Send and receive SMS messages.
Send and receive MMS messages.
Send using rich messaging channels like RCS and WhatsApp.
Send text-to-speech voice calls.
Send marketing and transactional emails.
Send and receive faxes.
Send letters and postcards via the cloud.
Send Fax Programmatically with our Fax API
ClickSend offers a powerful and flexible set of APIs that enable you to add the bulk fax opportunities to your existing applications. Boost productivity by automating fax sending and receiving through your current platforms and applications.
Get Started with the ClickSend Fax Gateway API
Download our sample fax API code to confirm they are compatible with your system! Our fax API can integrate into your existing code and make communicating with your customers easy.
Or integrate now with our free API key
Why Choose ClickSend's Fax Gateway API?
Our REST API offers an intelligent solution to sending bulk fax messages over a range of different fax networks. We have a range of downloadable sample codes so you can be assured of compatibility, and 24/7 customer support to ensure your integration goes smoothly.
No Upfront Contracts or Fees
Your first 25 messages are free and you don't have to input any card details to use your free credit. Price does not increase alongside the size of your database - send SMS how you want and only pay for what you use.
Not Another Software Subscription!
No, ClickSend is pay-as-you-use, you're not paying when you're not using. So don't worry about yet another monthly subscription that you forget about and keep on paying.
100% Uptime SLA Guarantee
We’re so confident in our reliability, we offer a 100% uptime SLA guarantee so you can be sure your message reaches when you need it to.
Don't Stress About Message Deliverability
Not only is our service always up and running, but we use direct routes. So rest assured when you click send your messages are being delivered on time, every time via the quickest route.
Free 24/7 Support
Talk to us through live chat, phone, contact form or email. There’s always a human on the other end, ready to help.
Relax, Help Is Always At Hand
Our global 24/7 chat is industry leading and we're proud to employ real humans in support to help our real humans in use. We understand businesses can require quick, efficient support at any time of the day or night.
What is a Fax API?
A fax API is a defined set of instructions which enable applications to send and receive faxes directly to and from a physical fax machine, via a fax Gateway. A Fax Gateway API is used to add native faxing capability to your existing software and applications.
Essentially, our API allows you to integrate faxing capability into your existing web and mobile applications, so that you can automate faxing online.
Why Businesses Love the ClickSend Fax API
Reliable Fax Service
Count on ClickSend to send your bulk fax reliably. With our 100% Uptime SLA Guarantee, you can send fax messages via API with confidence.
Or for non-developers, send faxes from our user-friendly Online Fax Marketing dashboard with the same confidence.
Seamless API Integration
Integrate with ease with our comprehensive SDK library and API documentation. Built for developers, by developers, we know how to play nice with hundreds of other platforms. Sign up now to access your API key.