Products
- Business SMS
  Send and receive SMS messages.
- Business MMS
  Send and receive MMS messages.
- Rich Messaging
  Send using rich messaging channels like RCS and WhatsApp.
- Voice
  Send text-to-speech voice calls.
- Transactional Email
  Send transactional emails via SMTP gateway.
- Fax Gateway
  Send and receive faxes.
- Online Post
  Send letters and postcards via the cloud.
Integrations
Developers
Pricing
Resources
- The 2023 guide to SMS
  Take your business from set-up to SMS success in 2023.
- Solutions
  See how our products can solve common business needs.
- Industries
  See how your industry is using our SMS gateway.
- Help Guides
  View our simple guides, tips and help docs.
- Blog
  Stay up to date with insightful and comprehensive content.
- Videos
  View helpful and resourceful video content.
- Contact Us
  Chat to our amazing sales and support staff.
English - Philippines

Talk to an Expert

Print to Post API

Name: Print to Post API
Brand: ClickSend
Rating: 4.6 (2472 reviews)

Send letters and marketing postcards programmatically with the ClickSend Post API. Our API makes sending letters online effortless!

Get Sending For Free

2023 Best Value SMS Gateway on SMS Comparison

Automate Your Letter or Postcard Sending with the ClickSend Post API

ClickSend offers a powerful and flexible set of APIs that enable you to add the bulk letter and postcard printing capabilities to your existing applications. Boost productivity by automating letter sending through your current platforms and applications.

Letter and Postcard Sending API

Communicate with your customers through a channel they simply can’t miss, and do it from your existing communication application network. Our letter API makes reaching your customers easy from your existing technical infrastructure.

Why Our API Code?

ClickSend have over a decade of developing backend API code that help our clients achieve effective results in efficient ways. We understand how your business applications are important and we work to improve them through our postal mail integration.

Built for Developers!

Our Post API has been created with developers at the forefront of our thinking. We understand the implemented code infrastructure your company has deployed for a range of reasons, so we deliver compatible APIs to your existing systems.

Get Started with the ClickSend Post Gateway API

Download our sample post API code to confirm it is compatible with your system. Our post API can integrate into your existing code and make communicating with your customers easy.

Check out these resources to help you start sending automated letters.

API Documentation

Guides

Libraries

Or integrate now with our free API key

Why Choose ClickSend's Print to Post API

Our REST API offers an intelligent solution to sending thousands of letters or postcards through the post. 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

With no setup cost or monthly fees, our pay-as-you-use option comes with highly competitive rates, proving to be a far better alternative to the Post Office!

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.

Intuitive API Integration

Global Coverage

Send mail anywhere in the world, at a click of a button. And at the best rates in the world!

What is a Print to Post API?

A print to post API, or postal mail API, is a defined set of instructions which enable systems to send letters or postcards in the mail via an online post gateway. A Mail API is used to add native snail mail capability to your existing software and applications.

Essentially, our API allows you to unlock physical mail capability in your existing software platforms.

Why Businesses Love the ClickSend Post API

Super Reliable

Count on ClickSend to get your post delivered anywhere on the planet on time every time. With our fully automated, yet heavily monitored, fulfillment system you can send post at any level to anywhere with 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.

Questions?

We can't wait to get you set up. Get in contact with us today or signup for a free trial to access our post API.