The API Guys
API Integration Specialists

Connect Your Systems With Reliable Integrations

Stop copying data between tools by hand. We connect your CRM, ERP, payment gateways, and SaaS platforms with secure, resilient integrations that just keep working. Based in Leeds, serving businesses across the UK.

API Integration Services

From a single third-party connection to a fully orchestrated integration layer, we make your systems talk to each other reliably.

Third-Party API Integration

Connect your application to the platforms you rely on — payment providers, accounting tools, CRMs, and more — with robust, well-tested integrations.

System-to-System Sync

Keep data consistent across your CRM, ERP, e-commerce, and internal tools with reliable two-way synchronisation.

Middleware & Integration Layers

Purpose-built middleware that sits between your systems, transforming and routing data so each platform gets exactly what it expects.

Integrations That Don't Break

Anyone can call an API once. The hard part is keeping integrations reliable when networks fail and third parties change. That's what we build for.

Webhook Handling

Reliable webhook endpoints with signature verification, idempotency, and replay protection so events are never lost or double-processed.

Retries & Resilience

Automatic retries with exponential backoff, dead-letter queues, and circuit breakers keep integrations running when third parties have a bad day.

Data Mapping & Transformation

Clean mapping between mismatched schemas and formats, so data flows correctly even when two systems disagree on structure.

Secure Authentication

OAuth 2.0, API keys, JWT, and HMAC signing handled correctly, with credentials stored encrypted and rotated safely.

Real-Time & Batch Sync

Whether you need instant updates via webhooks or scheduled batch jobs, we choose the right approach for each integration.

Monitoring & Alerting

Full logging, failure alerting, and dashboards so you always know your integrations are healthy — and hear about problems first.

How We Deliver Integrations

A proven process that catches the edge cases before they reach production.

01

Discovery

We map your systems, the data that needs to move between them, and the edge cases that tend to break integrations.

02

Design

We design the integration — real-time or batch, the auth model, error handling, and how conflicts are resolved.

03

Build & Test

We build the integration with automated tests and validate it against real-world data and failure scenarios.

04

Monitor & Support

We deploy with monitoring and alerting in place, and provide ongoing support as third-party APIs evolve.

Platforms We Integrate

We've connected hundreds of third-party services. If it has an API, we can integrate it — and if it doesn't, we'll find another way.

Stripe
PayPal
GoCardless
Xero
QuickBooks
Sage
Salesforce
HubSpot
Shopify
WooCommerce
Mailchimp
Twilio
Microsoft 365
Google Workspace
Slack
Zapier

Less Manual Work, Fewer Errors

Every system that doesn't talk to the next one means someone re-keying data, reconciling spreadsheets, and fixing mistakes. Good integrations remove that work entirely.

  • Eliminate manual data re-entry between tools
  • Keep orders, invoices, and customers in sync
  • Trigger workflows automatically across systems
  • Reduce errors from copy-paste and human handoff
  • Give your team a single source of truth

Built to Keep Running

Integrations are not a one-off build. APIs change, rate limits tighten, and endpoints get deprecated. We monitor your integrations and keep them working as the platforms around them evolve.

  • Proactive monitoring
  • Alerting on failures
  • Ongoing maintenance
  • Version upgrade support

Need Your Systems to Talk to Each Other?

Whether it's a single integration or a tangle of systems that need to work as one, our Leeds-based team can help. Let's map it out together.