Whistl API Integration

The easiest way to integrate & ship with the Whistl API

Use our single (REST) API to connect your online store to Despatch Cloud and start shipping with Whistl in 10 minutes. Simply upload your Whistl contract and combine the power of Despatch Cloud’s shipping software with your preferred couriers.

Why integrate Whistl through Despatch Cloud ?

  Lower your costs

Save money on developing and maintaining carrier integrations with one single api connection.

Go live faster

Keep everything under one roof with an user-friendly dashboard, giving you full control and visibility of your operations.

Integrate with over 120 carriers

Keep everything under one roof with an user-friendly dashboard, giving you full control and visibility of your operations.

API uptime of 99.99%

Keep everything under one roof with an user-friendly dashboard, giving you full control and visibility of your operations.

Ship Smarter

Use smart rules to automatically assign couriers to specific orders, ensuring you get the best courier for the job every time.

ISO 27001 Certified

Use smart rules to automatically assign couriers to specific orders, ensuring you get the best courier for the job every time.

Easily connect your store with our
Whistl API

Integrate your store with Despatch Cloud’s API and your orders will be imported automatically, waiting for you to create shipping labels. You can connect many stores to the same account and manage all your parcels from a single panel.
Shipping Demonstration Image

Print Whistl Shipping and Return Labels in an Instant

Despatch Cloud integrates directly with your Whistl account. This means that you no longer need to manually create labels by copy and pasting customer addresses from your online store. Whistl shipping labels are created automatically in our system

Whether printing for one label or bulk ordering, we have you covered. Our bulk order processing feature can print Whistl labels for multiple orders in one go and get your orders ready with speed.

Fully Branded Tracking Notifications for Whistl deliveries

Keep your customers in the loop with tracking pages and messages that match your brand and drive sales forward. 

A simple and effective way to boost customer loyalty and reduce WISMO queries, and now it is easier than ever. With our fully customisable template builder, all it takes is a few clicks to set up! 

Log Of Tracking Updates
Large Number Of Courier Logos

Access over 120 of Couriers with our single (REST) API

When it comes to shipping, we provide the very latest technology to give access to a huge range of couriers and make your shipping operations accurate and lightning quick.

Use our single (REST) API to add full shipping functionality to any system, WMS, ERP, or Marketplace without worrying about individual carrier requirements or updates. Simply upload your courier contract and combine the power of Despatch Cloud shipping software with with your preferred shipping services.

Real-time Shipping Analytics

Gain complete insight into your shipping costs, efficiency, and history and quickly identify your most popular Whistl delivery services.

Despatch Clouds in-depth reporting suite gives you the vital decision-making data you need to spot cost reduction and and customer service improvement opportunities.

An Analytics Dashboard
Panel To Input Parcel Details

Ship Smart, Not Hard.

Choosing which courier to send your parcels out with doesn’t have to be time consuming or difficult. With Despatch Cloud , you can say goodbye to that hassle. Our platform allows you to automate courier selection by creating rules based on various parameters such as parcel size, destination, parcel value, and more. Shipping made simple.

Security Against Courier Outages

We provide the business owner with complete control over their distribution channels, allowing you to pick and choose from any of our couriers that are appropriate for your job. This acts as a huge insurance policy against courier outages. A courier you chose suddenly can’t deliver your parcel? Our system will automatically pick the next best service, meaning no time is wasted in the delivery of your product.

This one of a kind service will save your company time and money by letting you pick and choose courier based on price and convenience. 

Shipping Data Chain

Customise Your Own Shipping Rules

Our multi-carrier shipping platform allows you to customise every aspect of your shipping operations. Every business is unique, and that is why we have developed a system that gives you the opportunity to make individual choices in your shipping.
From parcel size to location, date and more, you are in control of which Ship Smarter couriers you designate to which jobs.

Despatch Cloud offers a wide array of integrations, bringing together over 150 courier and shipping services into one streamlined, user-friendly platform to enhance your logistics and distribution networks globally.

Don’t take our word for it!

Here’s what actual Despatch Cloud customers have to say about our tool:

Despatch cloud literally changed my business!! After being stuck at 10 working days dispatch for months we got down to 3 working days in just 2 weeks using despatch cloud! The team are incredible! It’s a fully worthy Investment for your business!

Fantastic piece of software that streamlines the whole e-commerce progress. Orders are available straight away on Despatch cloud, saving time and subsequently massively improving efficiency..

I would just like to say that we have been working with Despatch Cloud for nearly 2 years and cannot fault them, they are diligent, professional and will always go the extra mile to ensure you are happy. An excellent team with great technical knowledge.

Next steps… find the right solution for you

Shipping Demo


If you’re only looking for courier connections:

If you already have an OMS or WMS and simply want to connect to more couriers like royal mail and expand your existing shipment management functionality, then shipping is what you need.

Warehousing Demo


If you need warehouse management:

Shipping was made for businesses that already have an warehouse management system in place, and simply want to connect to a wider range of couriers in a more efficient way. If you don’t have a WMS, but still want our Shipping functionality, try our warehousing solution.

Whistl API FAQs

Whistl, previously known as TNT Post, is a post and delivery management company based in the UK. They offer a diverse portfolio of UK and multinational package shipment solutions and single collection options for customers sending more than 200 items each day.

Our REST API integration enables you to:

  • Get access to all the UK’s primary national and international transport and logistics services. Other carriers available for integration include Royal Mail, Amazon Shipping, TNT, Yodel and many others,
  • Quickly and easily combine multiple shipping channels to your website at the click of a button,
  • Generate labels with API requests centrally,
  • Minimise delays that are due to incorrect address inputs thanks to our intelligent address formatting software,
  • Make sure that all your customer and courier data is fully encrypted using the latest technology, including world-beating AES-256 encryption.

Insights from our team

Ramblings and insightful tips from our team of shipping heros

Phone Email Notification

Shipment Tracking Emails:

Best Practices for 2024


Warehouse Efficiency:

Best Practices for 2024

Road Sign That Says E-Commerce

Shipment Tracking Email Inspiration

10 of the Best Shipping Notification Emails

Other Integrations

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