An API connection is only as good
as its handling of the day it genuinely goes wrong.
API integrations build reliable, well-engineered connections between your website and external systems' APIs, handling authentication, data mapping, and failure scenarios properly.
Where a third-party integration connects to a common tool with an existing, well-documented connector, API integration covers the more custom, specific work of connecting your website directly to an external system's API, whether a well-known service or something more specialised.
This requires genuine engineering care: proper authentication, accurate data mapping between systems that were not necessarily designed to work together, and robust handling of the inevitable moments when an external API fails or behaves unexpectedly.
Getting this right matters because a poorly built API integration can silently fail or return incorrect data, problems that are considerably worse if nobody notices them happening.
External APIs can change, experience outages, or behave unexpectedly, and an integration without robust handling for these scenarios can silently fail, causing real, undetected problems.
Custom API integrations, connecting to systems without an existing, well-documented connector, require genuine engineering expertise to build reliably and securely.
Poorly mapped data between systems creates subtle, hard-to-detect errors, information that looks correct at a glance but is subtly wrong in a way that compounds over time.
How it actually works: API integrations build custom connections to external systems' APIs, handling authentication securely, mapping data accurately between systems, and building robust error handling for the inevitable moments an external API fails or changes.
A structured process, not a black box.
API assessment
We assess the specific external API your business needs to connect to, its documentation, authentication requirements, and genuine reliability.
Secure authentication
We build secure authentication for the API connection, protecting both your systems and the external service.
Data mapping
We map data accurately between your website and the external system, particularly important where the two were not designed to work together natively.
Error handling
We build robust handling for API failures, rate limits, and unexpected responses, so problems are caught rather than silently causing incorrect behaviour.
Testing under real conditions
We test the integration under real conditions, including deliberately simulating failure scenarios.
Ongoing monitoring
We monitor the integration ongoing, catching issues from external API changes quickly.
What's technically involved
- Secure authentication for external API connections
- Accurate data mapping between disparate systems
- Robust error handling for API failures and rate limits
- Testing including deliberate failure scenario simulation
- Ongoing monitoring for external API changes
- Clear documentation of the integration's behaviour and dependencies
Related, but distinct.
API integrations cover more custom, specific connection work than general third-party integrations, particularly relevant where connecting to a system without an existing, well-documented off-the-shelf connector.
Common questions
How is this different from a general third-party integration?
API integration typically involves more custom, specific engineering work, particularly for systems without an existing, well-documented off-the-shelf connector already available.
What happens if the external API we connect to goes down?
Robust error handling is built specifically for this scenario, so a temporary outage is handled gracefully rather than causing a silent, undetected failure.
Can this connect to a specialised or less common system?
Yes, this is precisely the value of custom API integration, building a reliable connection even to systems without a common, pre-built connector already available.
How do we know if data is being mapped correctly between systems?
Through thorough testing before launch, confirming data transfers accurately, combined with ongoing monitoring to catch any drift or issues afterward.
Does this require ongoing maintenance?
Yes, external APIs can change independently of your website, making ongoing monitoring and occasional maintenance a genuine, expected part of API integration work.
API Integrations works best alongside a strong technical foundation: Custom Software, SaaS Platforms. Explore the wider Technology Partner Knowledge Centre for more.
Let's map out where this fits in your business.
A short, honest conversation is the fastest way to know where to start.