Connect your systems with clarity-first, strategy-led automation
We design and build custom APIs that connect your website, apps and tools – powered by clarity-first diagnostics to save time, reduce errors and unlock growth opportunities.
Best for: organisations with multiple systems and manual processes where automation needs to be secure, documented and measurable (time saved, error reduction, revenue impact).
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Decide whether custom APIs are right for you
Custom APIs are the right approach when you need reliable data flow between systems that were never designed to work together, reducing manual administration, removing errors and creating a single source of truth across marketing, operations and finance. When the integration needs to be secure, scalable and owned by your business (not dependent on fragile connectors), a bespoke API becomes an infrastructure investment that supports growth.
If the constraint is unclear – poor data hygiene, unreliable tracking, unclear ownership of systems or inconsistent workflows – building an API can add complexity without solving the root issue. We start with clarity-first diagnostics (Blueprint and Digital P&L) to map the workflow, define what “good” looks like and confirm the highest-impact automation opportunities before development begins.
See what custom APIs can deliver
We’ve helped ambitious brands integrate their systems with customer APIs.
Live Sync
Arthur ↔ Spaceflow
Leases and users stay in lockstep; access auto-revoked at move-out, no manual updates.
+13,000
Leads
+13,000 verified leads from CRM-driven digital campaigns with custom APIs
74
Sites Launched
74 Sites launched in less than 9 Months; phased WordPress rollout with centralised Events API
How we build secure integrations that remove operational friction
We diagnose workflow and data constraints, quantify value, then deliver secure, documented API integrations that scale with your organisation.
Discovery & architecture
Diagnostics to map workflows, systems and data objects, defining requirements and ownership before any build is started.
Measurement & governance
A commercial view quantifying value (time saved, error reduction, revenue impact) so integration work is prioritised by measurable return.
Delivery
Secure, documented delivery with testing, monitoring and handover, so integrations remain reliable, maintainable and owned by your team.
API delivery options for secure automation and integration
Connect your systems, automate workflows and create smarter digital experiences. After defining the strategy, we deliver custom APIs and integrations that help your platforms work seamlessly together, securely and at scale.
Custom API Development
Tailored to your systems and workflows.
3rd Party Integrations
Connect CRMs, ERPs, marketing platforms and more.
Payment Gateway APIs
Secure, reliable transaction handling.
Booking System Integrations
Automate reservations and scheduling.
Ongoing Support
Maintenance and upgrades for custom APIs.
Delivery onboarding: what happens in the first 30 days
API delivery starts with secure scope definition, ownership and a controlled build/test plan. If strategic work exists we align to it; if not, we establish the minimum discovery and governance foundations needed for safe delivery.
Governed onboarding
Map systems, workflows and data objects; define integration scope, constraints and owners; agree security approach and environments.
Governance foundation
Define success criteria (time saved, error reduction, operational impact); confirm compliance boundaries; specify monitoring, logging and documentation standards.
First sprint delivery
Write endpoint specs and error handling; build in staging; test real scenarios; produce documentation and deployment plan.
Follow a proven build framework
We apply our Conversion-Focused Infinity-5 Framework to every API project – starting with clarity-first diagnostics before specification, build and optimisation.
Map processes and define integration requirements.
Set measurable efficiency or revenue goals.
Build and test the API for stability.
Refine performance, security and scalability.
Expand integrations as your business grows.
Compare us with other agencies
Most agencies avoid setting targets until months in. We do it upfront.
| Other Development Agencies |  | |
|---|---|---|
| Strategy | Rely on pre-built connectors | Clarity-first diagnostics leading to bespoke APIs built for your processes |
| Support | Limited support | Ongoing maintenance |
| Expertise | Often delivered by junior developers. | Delivered by expert developers with 10+ years experience. |
| Pricing | Hourly rates & hidden fees | Clear, transparent pricing – no hidden fees |
Learn from real results
Our custom APIs and integrations have delivered measurable impact by removing manual admin, improving data accuracy and connecting systems so teams can move faster – with performance tracked against clear targets.
CERT Property
Data Entry
Automated: Tenant and lease records now auto-sync between systems, cutting admin time and errors.
The Vulnerability Initiative
+40%
lower CPL vs. industry benchmarks
RedCat Independent Pubs
3 Week Delivery
of centralised events API created for 70+ sites
Ready to remove manual work and govern your integrations?
If you need strategy-led API delivery that improves data accuracy, reduces operational friction and scales securely, let’s assess fit and define the safest path to implementation.
Ross Crawford FCIM, Managing Director – helping ambitious brands turn ideas into measurable growth. Fellow of the Chartered Institute of Marketing.
Need clarity on what to automate?
Start with our Digital Performance Blueprint to identify the highest-impact automation and API opportunities with clarity.
It’s the process of building or integrating APIs so your systems communicate seamlessly – connecting CRMs, websites, booking tools, and databases to reduce manual work and improve accuracy. It is the backbone of the Digital P&L. It ensures data flows accurately between Marketing, Finance and Operations without human error.
Most integrations take 3-6 weeks, but complex or multi-system builds may need longer. We outline clear milestones and test each stage before deployment.
Yes. We work with CRMs, ERPs, booking platforms, payment gateways and custom software. We’ll review documentation, design the endpoints, and ensure secure, stable data flow.
Yes, you retain full ownership. We deliver complete documentation so your internal or third-party developers can maintain it confidently.
We don’t guarantee absolute uptime, but we engineer APIs for reliability and monitor performance continuously. Targets are agreed at project start based on load requirements and SLA expectations.
All APIs are built using HTTPS, token or key-based authentication and encrypted data transfer. We follow GDPR and industry best practices for security and privacy.
Ongoing monitoring, version updates, endpoint adjustments and bug fixes. We can also expand functionality as your business evolves. Support is billed hourly or via retainer.
Development time varies with complexity, so we provide a scoped estimate. Commercial Engagement Models include scoped project deliverables or DevOps retainers. Get in touch for more information on our Engagement Models.
Yes, we can share relevant case studies on a call. We’ve built booking integrations, product-feed APIs and CRM connectors for brands across multiple industries. Each example shows measurable efficiency gains and ROI improvements.