What Is an API?
An API (Application Programming Interface) is a structured way for two pieces of software to communicate and share data securely.
Why SMEs use APIs
APIs are essential when your business uses several different systems — for example:
- Linking a bespoke web app to a mobile Android app
- Integrating with Xero, Sage or QuickBooks
- Sharing job data with a field-engineer app
- Sending automatic notifications or SMS messages
Modern systems in London, Hertfordshire and Essex frequently depend on APIs to keep data in sync and reduce manual data entry.
Common types of APIs
- REST API — most common, uses URLs and JSON
- Webhook — event-based “push” notifications
- OAuth API — secure login via Google/Microsoft
A well-designed API keeps your systems flexible, secure and easy to expand over time.