API integration: connecting your business systems

By Steven Sharp · 8 March 2025 · 2 min read

Illustration: an old beige computer and a modern flat screen on a desk, joined by one cable.

When data is trapped in separate systems, staff spend hours copying and pasting, and customers get a disjointed experience. APIs let systems talk to each other so people don’t have to.

This article explains API integration in plain terms, shares common uses and shows how connected systems help a business grow.

Integrate your software and you integrate your business.

What is an API?

An application programming interface exposes specific functions, like “create invoice”, so that other applications can call them securely.

Common integration patterns

Real-time sync: e-commerce orders appear in your ERP as soon as they’re placed.

ETL pipelines: scheduled jobs clean your data and load it into an analytics warehouse overnight.

Pitfalls to avoid

Rate limits, versioning and security tokens: ignore these and integrations break. Middleware or an integration platform (iPaaS) can take away some of the complexity.

Connected systems free your team to focus on the work that matters, not admin. When your CRM talks to your accounting software and your website stays in step with your stock, things stop falling through the gaps.

If you have two systems that should be talking to each other, tell us which ones. We’ll explain how we’d connect them and what it would involve. There’s more on how we work on our integrations page.

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