Custom Paazl integration
Appfront develops custom Paazl integrations that connect your webshop to the full multi-carrier shipping platform. Using the official Paazl REST API, we build integrations that improve checkout conversion, automate labelling and streamline customer communication about shipments, with access to more than 300 carriers from a single system.
Multi-carrier shipping from one platform
Paazl, now part of Wuunder, is a multi-carrier shipping platform built for e-commerce businesses that want control over their entire shipping chain. The platform provides access to more than 300 carriers, from PostNL and DHL to specialised same-day and sustainable carriers, and manages them from a single central API.
A Paazl integration connects the shipping platform directly to your webshop, WMS or ERP system. Orders flow automatically into Paazl, where the system selects the right carrier based on your rules, generates labels and sends track and trace information back to your customer. Manual copying between systems disappears, and at checkout your customer sees the shipping option that best suits their order.
Appfront builds these integrations to measure using the official Paazl REST API. We tailor the checkout widget, carrier selection rules and returns flow to your specific business processes, so the integration works technically and adds commercial value. See also our page on smart API integrations for a broader view of our approach.
Automatic carrier selection
Based on weight, destination, speed or sustainability, Paazl automatically chooses the best carrier. No more manual consideration for each shipment: your rules determine the logic.
Checkout optimisation
The Paazl Checkout Widget shows your customers the right delivery options, including pickup points, delivery time slots and express delivery, so their choice supports conversion rather than causing frustration.
Proactive tracking
Track and trace updates are automatically sent to your customer. In the event of disruptions such as delays or failed deliveries, Paazl detects the problem before your customer gets in touch.
Our development process for Paazl integrations
A shipping integration affects your checkout, warehouse operations and customer communication all at once. That is why we work in a structured way: from understanding your shipping logistics to a working integration that scales with your order volume. Every step aims at an integration your operations team can understand and trust.
We map your current shipping flows: which carriers you use, which rules apply per country or product category, and where the bottlenecks in your current process lie.
We design the integration architecture, configure the carrier selection rules and determine how checkout, labelling, tracking and returns flow through the system.
We build the integration with the Paazl REST API, implement the checkout widget and test with real carriers in the Paazl sandbox. You see working builds along the way.
Controlled go-live with data validation per carrier, followed by monitoring for label errors, tracking discrepancies and carrier availability. Ongoing management and further development.
What a Paazl integration concretely delivers
Every Paazl integration is tailored to your shipping logistics. Below are the features we most often build for e-commerce businesses that want to centralise and automate their shipping.
Checkout widget integration
The Paazl Checkout Widget is integrated into your webshop and dynamically displays the available shipping options, service points and delivery time slots. At checkout, your customer chooses the option that suits them best, whether collection, home delivery or express, without you needing to build separate logic for each carrier.
Automatic label generation
As soon as an order comes in, the integration automatically generates shipping labels via the Paazl Ship module. Based on your rules, the right carrier is selected, the label is created and the tracking code is sent back to your webshop or WMS. Manual labelling becomes a thing of the past.
Multi-carrier selection rules
Configure rules that determine the optimal carrier for each order: the cheapest option for standard parcels, the fastest for express, the most sustainable for environmentally conscious customers. In the event of outages or capacity problems, the system automatically switches to a fallback carrier without manual intervention.
Track and trace synchronisation
Tracking information from all carriers is centralised via the Paazl Track module and automatically passed back to your webshop and customer. Proactive notifications for delivery attempts, delays or exceptions mean your customer service team can be less reactive.
Returns management
Returns are handled through Paazl, with support for label-free returns, QR codes and returns to pickup points. The integration automatically records the return status in your webshop or ERP, so refunds and stock movements can be processed quickly without manual follow-up.
ERP and WMS synchronisation
We connect Paazl to your ERP or WMS system so that shipping statuses, costs and return information are processed automatically in your accounts and stock management. No more manual reconciliation between your shipping system and your back office. See also our middleware solutions for complex system integrations.
Shipping logistics for every type of e-commerce
The shipping needs of a fashion webshop differ fundamentally from those of a B2B wholesaler. A Paazl integration adapts to your specific situation. Below are four scenarios we come across regularly.
Fashion & lifestyle webshops
Fashion and lifestyle webshops contend with high return rates and seasonal peaks. A Paazl integration provides streamlined returns handling with label-free options, automatic carrier selection that scales up during busy periods, and checkout options that match your target audience's expectations, from same-day delivery to sustainable shipping. See also our e-commerce development services.
B2B and wholesale
Wholesalers often ship pallets, cartons and part loads to business addresses with specific delivery time windows. Alongside parcel transport, Paazl also supports pallet carriers and offers proof-of-delivery functionality. We connect the platform to your ERP system so that freight costs are charged on automatically and customer-specific shipping agreements are respected.
International shippers
Webshops shipping to multiple countries benefit from Paazl's extensive carrier network and automated customs documentation. The integration selects the best carrier for each destination country, generates the required CN23 forms and handles local tracking. Your customer enjoys a consistent delivery experience, whether the parcel is going to Belgium or Norway.
Multi-warehouse e-commerce
Businesses with multiple warehouses or fulfilment locations face the challenge of selecting the nearest warehouse for each order and triggering the right carrier. A Paazl integration connects your WMS to the carrier network per location, so every shipment leaves from the optimal point. This keeps shipping costs under control and delivery times short, even as you grow.
Technology we use
We build Paazl integrations using modern, maintainable stacks. The exact choice depends on your existing e-commerce platform, WMS and internal preferences, so that your own team can manage or further develop the integration. See also our page on custom software for more background on our technical approach.
Why choose Appfront for your Paazl integration?
Appfront has experience building shipping integrations for e-commerce businesses in the Netherlands. We understand the challenges of multi-carrier shipping: carrier selection logic that fits your margins, checkout optimisation that protects conversion, and tracking flows that relieve your customer service team rather than burden it.
We always begin with a thorough analysis of your current shipping flows and carrier agreements. A Paazl integration must do more than work technically: the carrier selection rules need to support your commercial goals, and the checkout experience needs to match your customer's expectations.
For every integration, we write clear documentation and make sure your own team or a future supplier can understand and manage the integration. No black box, but transparent code and clear agreements on monitoring, adding carriers and further development.
We also have experience integrating with individual carriers. See our pages on PostNL integrations, DHL integrations and DPD integrations for an overview of our expertise in the shipping domain.
- Experience with shipping integrations and e-commerce logistics
- Knowledge of the Paazl REST API and Checkout Widget SDK
- Carrier selection rules aligned with your margins and SLAs
- Checkout optimisation focused on conversion
- Structured error handling and carrier fallback logic
- Comprehensive logging and monitoring from day one
- Clear documentation your team can read and manage
- A fixed point of contact, no account managers passed around
Security and privacy in shipping integrations
Shipping data contains personal information: the names, addresses, phone numbers and email addresses of your customers. Appfront treats every shipping integration with that in mind. We do not store unnecessary customer data in the integration layer, encrypt sensitive information in transit and document the data flows so that your record of processing activities stays up to date.
Authentication with the Paazl API runs through secure methods with limited permissions. Before we start, we agree which customer data is actually needed for the shipping flow, and we minimise the scope of the integration in line with the data minimisation principle of the GDPR.
More on our security approach: information security policy and CVD policy.
- GDPR-compliant processing of customer and address data
- Encryption in transit (TLS 1.2+) and at rest
- Data minimisation: only necessary fields sent to carriers
- Role-based access and least-privilege principles
- Audit logs with traceable data flows
- Monitoring and alerting for anomalies in shipping data
- Secrets management in line with best practice
- Documentation for your record of processing activities
Frequently asked questions about Paazl integrations
Answers to the questions we are asked most often about custom Paazl integrations.
A Paazl integration is a technical link between the Paazl multi-carrier shipping platform (part of Wuunder) and your webshop, WMS or ERP system. Through the Paazl REST API, shipping options, labels, track & trace and returns handling are automated. The platform supports more than 300 carriers, so a single integration gives you access to the full Dutch and international shipping landscape, from PostNL and DHL to specialist same-day and sustainable carriers.
Paazl gives access to more than 300 carriers worldwide, including PostNL, DHL, DPD, UPS, FedEx, GLS, Budbee and Trunkrs. The platform supports parcel and pallet shipping as well as specialist services such as same-day delivery and sustainable transport. With one API integration, you can direct all of these carriers without maintaining a separate integration for each. New carriers can be added without changes to your webshop.
A Paazl integration is built via the official REST API. We connect your webshop's checkout to the Paazl Checkout Widget so customers see the right shipping options. The order system is linked to the Ship module for automatic labelling and carrier selection, and the Track module handles proactive customer communication about delivery status. The implementation is tailored to your shop platform (Magento, Shopify, WooCommerce or a custom solution) and to your specific order flow and business rules.
With several carriers at your disposal, you can choose the best option for each shipment based on cost, speed or sustainability. If one carrier experiences disruption or capacity problems, you can switch automatically to an alternative, so your delivery reliability does not depend on a single provider. You can deploy specific carriers for specific regions, product categories or customer groups. You also strengthen your negotiating position, since you are not bound to the rates or terms of a single party.
Lead time depends on how complex your shipping logistics are and how many systems need to be connected. A standard webshop integration with checkout widget, labelling and tracking can be up and running within a few weeks. More complex scenarios, such as multiple warehouses, international shipping with customs documentation, or bidirectional ERP synchronisation, take longer. After an intake meeting, we provide a realistic timeline based on your specific situation.
The cost is determined by the number of systems to connect (webshop, WMS, ERP), the complexity of your shipping rules and carrier configuration, the level of automation you want, and the scope of the returns flow. Ongoing management, monitoring, and adding new carriers or shipping rules also affect the investment. We always provide a clear quote following a no-obligation analysis of your current shipping process and desired situation.
Yes. Shipping data contains personal details such as names, addresses and contact details. All integrations are developed in line with Dutch privacy legislation and security best practices. We encrypt data in transit, use authentication methods with limited permissions, and only send the customer data that is necessary to carriers, nothing more. Data flows are documented so that your record of processing activities remains complete and you can demonstrate which data goes where.
Yes. Appfront regularly takes over existing shipping integrations, even when they were originally built by another party. We first carry out a code and architecture review, document the integration and draw up a maintenance plan. From then on, we can handle changes: adding new carriers, modifying shipping rules, extending returns flows, and implementing or improving monitoring. See also our web app development services for broader support.
Optimise your shipping process
Tell us what your current shipping flow looks like and where the bottlenecks lie. We will help you think through the architecture and deliver a working Paazl integration that suits your e-commerce operation. A no-obligation first conversation will give you a clear picture of the possibilities within half an hour.