API Integrations That Connect Your Entire Stack
Your business tools should work together seamlessly. We design, build and maintain API integrations that connect your CRM, ERP, payment provider, marketing platforms and custom systems into one unified data ecosystem — eliminating manual work and data silos.
💻 Development & Engineering · one of 50 servicesWhat is API integration?
An API (Application Programming Interface) is a set of rules that allows different software systems to communicate with each other. API integration is the process of connecting those systems so they share data automatically — without manual export-import, copy-paste or re-keying.
Modern businesses run on dozens of tools: a CRM for sales, an ERP for operations, an e-commerce platform for orders, a payment gateway for transactions, a marketing platform for campaigns. Without integration, these systems operate in silos — meaning duplicated data entry, human errors, slow processes and a fragmented view of your business.
We build robust, well-documented integrations using REST APIs, GraphQL, webhooks, OAuth 2.0 and custom middleware. Whether you need two systems to talk or a full data mesh connecting ten platforms, we architect and deliver integrations that are reliable, maintainable and built to last.
- API architecture design & documentation
- REST & GraphQL integration builds
- Webhook setup & event handling
- OAuth 2.0 & API key authentication
- Data mapping & transformation logic
- Error handling & retry mechanisms
- Integration testing & QA
- Monitoring, alerting & ongoing support
Integration types we specialise in
From out-of-the-box connectors to fully bespoke middleware, we integrate any platform your business relies on.
CRM Integrations
Connect Salesforce, HubSpot, Pipedrive and Zoho CRM to your website, marketing tools and operational systems. Synchronise contacts, deals, activities and custom objects in real time.
Payment Providers
Integrate Stripe, PayPal, GoCardless, Worldpay and Braintree to automate payment collection, subscription billing, refunds and reconciliation across your platforms.
Shipping & Logistics
Connect Royal Mail, DPD, Evri, DHL and FedEx APIs to automate label generation, tracking updates, delivery notifications and returns management — directly from your order management system.
Marketing Platforms
Sync customer and behavioural data with Mailchimp, Klaviyo, ActiveCampaign and HubSpot Marketing Hub. Trigger personalised campaigns from real-time events in your other systems.
Accounting & Finance
Integrate Xero, QuickBooks, Sage and FreeAgent to automate invoicing, payment reconciliation, VAT reporting and financial data synchronisation across your business tools.
E-Commerce Platforms
Connect Shopify, WooCommerce, Magento and BigCommerce to your ERP, WMS, 3PL and marketing stack. Automate order sync, inventory updates and customer data flows.
Communication Tools
Integrate Twilio for SMS, SendGrid and Mailgun for email, Slack for internal alerts, and WhatsApp Business API for customer messaging — all triggered by events across your platforms.
ERP Systems
Connect SAP, Microsoft Dynamics 365, Oracle NetSuite and Sage 200 to your e-commerce, CRM and supply chain tools. Synchronise inventory, purchase orders, financials and production data.
Our technical approach
We engineer integrations that are robust, observable and easy to maintain — not fragile scripts that break at the first API change.
Discovery & Scoping
We map every data flow your business needs — which systems send data, which receive it, what triggers events and what transformation logic is required. We document the full integration specification before writing a line of code.
API Research & Architecture
We review the API documentation for every platform involved, identify rate limits, authentication methods, webhook capabilities and data schemas. We then design the optimal architecture — direct API-to-API, middleware layer or event bus — based on your requirements.
Authentication & Security
We implement OAuth 2.0, API key management and token refresh flows securely. All credentials are stored in environment variables or secrets managers — never in code. We follow OWASP API security best practices throughout.
Build & Data Mapping
We write the integration logic, data transformation functions, field mapping and business rules. REST endpoints, GraphQL queries, webhook handlers and queue processors are all built to handle edge cases, null values and unexpected API responses gracefully.
Testing & Staging
Full integration testing in sandbox environments before any live data is touched. We test happy paths, error scenarios, rate limit handling, duplicate prevention and idempotency — ensuring the integration behaves correctly under all conditions.
Monitoring & Support
Every integration ships with logging, error alerting and a dashboard so you can see data flowing in real time. We offer ongoing management retainers to handle API version upgrades, platform changes and new requirements as your business evolves.
Common use cases
These are some of the most impactful integrations we build for UK businesses. If yours is not listed, get in touch — we have likely done it.
Technologies & protocols
We work at the protocol level and across every major integration platform.
Order-to-fulfilment automation
Shopify/WooCommerce orders automatically flow to your 3PL or warehouse system, trigger shipping label generation via Royal Mail or DPD, and update tracking in your CRM.
Lead routing & CRM sync
Website enquiries, chatbot conversations and paid ad leads are captured, scored and routed automatically to the right sales rep in HubSpot or Salesforce — with no manual data entry.
Inventory sync across channels
Stock levels update in real time across Shopify, Amazon, eBay and your ERP whenever a sale is made — preventing overselling and manual stock counts.
Automated invoicing
When a deal is marked as won in your CRM, a Xero or QuickBooks invoice is automatically created, sent to the client and tracked for payment — without anyone touching a spreadsheet.
Integration Protocols
Authentication
Middleware & Infrastructure
Monitoring & Observability
Everything included
Every integration project is fully documented and delivered with the tools you need to understand, maintain and expand it.
- Integration specification document
- Data flow diagrams & field mapping
- Secure credential & secrets management
- Error handling & retry logic
- Idempotency & duplicate prevention
- Sandbox & production testing reports
- Integration logs & audit trail
- Real-time monitoring dashboard
- Alerting for failures & anomalies
- Full technical documentation
- Handover & walkthrough session
- 30-day post-launch support included
API integrations for every sector
E-Commerce & Retail
Order management, inventory sync, shipping automation and marketplace integrations that scale with your sales volume.
B2B & Enterprise
CRM-to-ERP data flows, lead routing, automated quoting and document generation that eliminate manual steps from your sales cycle.
Healthcare
Secure patient data flows between booking systems, EHRs and CRMs — built with GDPR compliance and data encryption at every layer.
Financial Services
Payment gateway integrations, open banking API connections and automated reconciliation flows — all built to FCA-compliant security standards.
API integration FAQs
How long does an API integration project take?+
A single, well-documented API integration typically takes 1–3 weeks from kickoff to production deployment. Multi-system integrations involving custom middleware or complex data transformation logic take 4–8 weeks. Enterprise data mesh projects are scoped individually. We always provide a timeline in our project proposal, and we communicate proactively if anything changes.
What if the API I need to integrate does not have good documentation?+
We encounter this regularly. Our team is experienced at reverse-engineering poorly documented APIs, working with vendor support teams to fill gaps and building resilient integrations that handle undocumented edge cases gracefully. Where an API is genuinely too poorly documented or unstable to integrate reliably, we will tell you honestly and propose alternatives such as database-level integrations, file-based transfers or browser automation.
How do you handle GDPR and data security?+
Data security is central to everything we build. All credentials and API keys are stored in secrets managers (AWS Secrets Manager, HashiCorp Vault) — never in source code. Data in transit is always encrypted via TLS 1.2+. We implement the principle of least privilege so integrations only access the data they need. We document all data flows to support your GDPR data processing register and can sign a Data Processing Agreement (DPA) where required.
Can you use iPaaS tools like Zapier, Make or Boomi?+
Yes. For simpler use cases, iPaaS tools like Zapier, Make (formerly Integromat), Boomi or MuleSoft can be the right choice — fast to implement and straightforward to maintain. For high-volume, complex or mission-critical integrations, custom-coded solutions are typically more robust, significantly cheaper at scale and give you full control. We will recommend the right approach for your specific situation during the scoping call.
What happens when an API breaks or a platform changes its API version?+
This is one of the most common integration challenges. We build with defensive programming practices — graceful error handling, alerting on unexpected responses and comprehensive logging — so you know immediately if something breaks rather than finding out days later from missing data. Clients on our Managed Service retainer receive proactive monitoring and we handle API version migrations as part of the monthly fee.
Do you build integrations with custom or bespoke internal systems?+
Absolutely. Many of our most impactful integrations connect legacy or bespoke internal systems that lack modern APIs. We can build API wrappers around database layers, implement file-based integrations (SFTP, CSV, EDI), build message queue consumers or develop RESTful API layers on top of existing systems. If your business runs on a custom platform, we will find a way to connect it.
Can you integrate with platforms not on your list?+
Yes. Our list of named platforms is illustrative, not exhaustive. If a platform offers an API — and almost every modern SaaS tool does — we can integrate with it. We regularly integrate with industry-specific platforms, niche tools and proprietary systems across sectors including healthcare, legal, logistics, manufacturing and financial services. Share your requirements and we will confirm feasibility on our scoping call.
What is the difference between a webhook and a REST API?+
A REST API is a pull-based approach — your system requests data from another system when it needs it. A webhook is push-based — a platform automatically sends data to your system the moment an event occurs (e.g., a payment succeeds, an order is placed). We use both depending on what each platform supports and what your business needs. Webhooks are generally preferred for real-time event-driven integrations; REST polling works well for scheduled data syncs and queries.
API integration pricing
Every integration is different. These are indicative starting prices — we provide a fixed-price quote after a free scoping call.
All prices ex-VAT. Fixed-price quotes provided after free scoping call. Contact us to get started.
Connect two platforms with a focused, well-tested integration between a single pair of systems.
- One platform-to-platform connection
- Bi-directional data sync
- OAuth 2.0 or API key authentication
- Basic error handling & logging
- Integration specification document
- Sandbox & production testing
- 30-day support included
Connect multiple platforms through a custom middleware layer for a unified data ecosystem.
- 3–6 platform integrations
- Custom middleware architecture
- Data transformation & mapping
- Webhook event handling
- Advanced error handling & retries
- Real-time monitoring dashboard
- Full technical documentation
- Handover & training session
- 60-day support included
Full data mesh architecture connecting your entire technology stack with enterprise-grade reliability.
- Unlimited platform integrations
- Event-driven architecture
- Message queuing (RabbitMQ/SQS)
- Data warehouse connections
- Dedicated integration engineer
- SLA-backed uptime guarantee
- Incident response & alerts
- Quarterly architecture reviews
Proactive monitoring, API version updates, new requirements and priority support on a monthly retainer.
- Proactive integration monitoring
- API version upgrade management
- Bug fixes & incident response
- Minor enhancements included
- Monthly performance report
- Priority email & phone support
- Quarterly review calls
- New integration scoping at no charge
API Integrations near you
Remote-first delivery from Birmingham with local market know-how. Choose your area for a page tailored to your city.
South & South West
SouthamptonPortsmouthOxfordReadingBasingstokeSwindonBristolBathCheltenhamGloucesterExeterPlymouthBournemouthMidlands
BirminghamCoventryLeicesterNottinghamDerbyWolverhamptonStoke-on-TrentMilton KeynesNorthamptonSolihullWalsallTamworthTelfordShrewsburyWorcesterFrom the knowledge hub
Value-Based Pricing for Service Firms: Escaping the Hourly Trap
How service firms move from hourly billing to value-based pricing: the scoping questions that surface what work is really worth, a three-tier proposal structure, and a low-drama plan for migrating existing clients off day rates.
Notion vs Asana vs Monday: Project Tools for Teams Under Ten
Notion, Asana and Monday.com compared for teams under ten: honest setup effort, what small seat counts really cost over a year, the failure mode each tool invites, and a clear recommendation for every working style.
E-Invoicing Is Coming to the UK: How to Get Ahead Now
The UK is weighing an e-invoicing mandate and parts of the EU already require it. What structured invoicing is, why adopters get paid faster, and how to switch on early using your existing accounting software.