As businesses grow and processes get more complex, it becomes clear that out-of-the-box solutions don’t always cut it. For many eCommerce sellers using Linnworks, customisation becomes a necessity—not just a nice-to-have. Both can help automate processes, streamline operations, and connect your systems—but they work very differently. And choosing the wrong one can cost time, effort, and money.

Let’s break it down in simple, real-world terms so you can decide what fits best for your needs.

What Is the Linnworks API?

Think of the Linnworks API as a bridge that lets other software talk to your Linnworks account. It’s how systems like ERPs, third-party marketplaces, or custom-built apps pull and push data—like stock levels, orders, product info, and so on.

With APIs, developers can build tools outside Linnworks that sync or interact with your account, either in real time or on a schedule.

Common ways businesses use the API:

• Connecting Linnworks with their accounting or ERP system
• Building dashboards to view stock or order trends
• Syncing inventory across multiple supplier platforms
• Automating PO generation or order fulfillment

What Are Linnworks Custom Scripts?

Custom scripts, on the other hand, are small chunks of code that run inside Linnworks. They’re written in JavaScript and are triggered at specific points—like when an order is imported, when stock changes, or during shipping label generation.

These scripts are perfect for tweaking how Linnworks behaves for your business—without needing to build anything external.

Some real examples of script use:

• Auto-assigning orders to a specific warehouse based on delivery country
• Tagging urgent orders automatically
• Adjusting inventory for kits or bundles
• Adding custom fields or values to orders as they come in

When Should You Use the Linnworks API?

Let’s say you’re running a growing eCommerce business and need to connect your backend ERP to Linnworks. Or maybe you’ve got a custom CRM where your sales team tracks bulk orders. In both cases, the API is the tool for the job.

Here’s when the API makes the most sense:

1. You Need to Connect External Systems

Whether it’s syncing data with your ERP, pulling reports into a BI tool, or updating stock from a supplier’s system—API lets different platforms exchange information smoothly.

2. You Want to Build a Custom Dashboard or App

If your team needs a visual dashboard to track orders, or you want to give clients a login portal to view their order statuses—API gives you that flexibility.

3. You’re Automating Processes That Don’t Start in Linnworks

Maybe you want orders from a third-party app to flow into Linnworks automatically, or POs to be sent based on supplier stock feeds. These are API jobs.

When Are Scripts a Better Fit?

Custom scripts are ideal when you’re working within Linnworks itself—like tweaking how it processes orders or handles inventory logic.

Here’s when a script is the right tool:

1. You’re Adjusting Orders Based on Business Rules

Let’s say orders from a particular region always ship from Warehouse B. Or maybe you add special handling tags for certain SKUs. A script can automate that as soon as the order comes in.

2. You’re Dealing With Kits and Bundles

Scripts are great for recalculating available quantities of kits based on stock of individual components—something not easily done with regular inventory syncs.

3. You Want Light, Low-Maintenance Automation

Because scripts run inside Linnworks, you don’t need to worry about servers, hosting, or uptime. They’re managed within the platform, making them easier to handle long term.

Conclusion

Customizing Linnworks can save you hours of manual work and make your operations more efficient. But choosing between API and scripts is about understanding what you really need to automate—and what the bigger picture looks like.

If you’re unsure, talk to someone who’s done this before. A Linnworks professional can look at your workflows, recommend the right tools, and help implement a setup that scales with your business.

Want help figuring out the right approach for your store? We’d be happy to guide you. Connect for more!