Custom API integration services
Reliable integrations for UK businesses that need information to move without repeated entry, silent failures or fragile workarounds.
Two sensible integration routes
The right approach depends on which system owns the information, what each platform permits and how the business should recover when an exchange cannot complete.
Connect established platforms
Your CRM, finance platform, portal or communication service may already expose the right API. I map which system owns each record, then build a controlled connection that moves approved information without repeated rekeying.
Create a controlled API layer
When useful information is trapped inside bespoke or ageing software, a focused API can provide an authorised route for another application, partner or customer journey without forcing an immediate platform replacement.
API integration capabilities
An integration should remove a real operational hand-off, not simply make two applications exchange technical messages. I design the connection around the customer, job, document, payment or decision that needs to move safely between systems.
Move approved customers, jobs, invoices, payment states and account information between operational and finance systems.
Connect secure portals to the records, documents and statuses held by the systems behind the customer experience.
Generate, transfer, store and retrieve important documents through controlled routes with visible ownership and status.
Connect payment activity to orders, accounts, subscriptions or service records without relying on manual reconciliation alone.
Keep relevant email, SMS, call or notification events attached to the customer, case or job they relate to.
Bring selected operational information into dashboards, scheduled reports or another approved data destination.
Exchange agreed records with third parties through authenticated endpoints, clear mappings and documented responsibilities.
Create a focused API around your own application when an authorised service, partner or product needs reliable access.
Connected business systems
I have delivered connections across CRM, finance, insurance, communications, cloud storage and bespoke operational software. Every proposed platform still needs its access, documentation, limits and supplier permissions checked before the route is agreed.
Connected insurance and CRM information so approved operational data could support compliant policy-document creation and servicing.
Connected business call activity with secure cloud storage so important records could remain linked to the wider compliance workflow.
A controlled integration route
The risky work is addressed early, then the integration is built in visible stages around realistic information and the failures your team will eventually need to handle.
Identify the source of truth, records, identifiers, triggers, business rules, volumes and people responsible for exceptions.
Inspect the available API, permissions and representative data, then test the riskiest exchange before the wider workflow depends on it.
Implement mapping, validation, authentication, logging, safe retries and a clear route for incomplete or rejected information.
Deploy through a controlled route, document ownership and watch the connection as data, usage and third-party APIs change.
Relevant integration experience
These projects show how integrations support wider insurance, validation, communication, document and reporting workflows rather than operating as isolated technical features.
View projectA central operating system with controlled API routes for installer, accreditation, policy, communication and reporting activity.
View projectInstaller submissions, evidence, certification, Xero activity and communication records connected around one live case.
View projectA customer-facing portal supported by controlled product, provider, broker, document, access and reporting records.
Work directly with me
I am a Business Software Consultant and Developer based in Greater Manchester. I work directly with decision-makers and operational teams to understand the exchange, design the controls and deliver the software that keeps systems communicating.
Start with the repeated hand-off
It connects applications so approved information and actions can move between them without somebody exporting, copying and retyping the same data. The work can involve a third-party API, a custom API around your own software or both. A reliable integration also includes mapping, authentication, validation, logging, failure handling and documentation.
I can work with CRM, finance, payment, document, communication, customer portal, reporting and bespoke operational systems where a suitable technical route exists. I have delivered work involving Microsoft services, Xero, 8x8, Amazon Web Services, messaging services and custom APIs. I confirm the exact platform, access and supplier constraints before promising a connection.
There may still be a supported import, export, webhook, database or supplier-assisted route, but it needs careful investigation. In some cases a small custom API can be added to software you own. In others, attempting to bypass a supplier restriction would create more risk than value, so I will explain the practical options rather than promise an unsafe workaround.
Yes, when both platforms support the required actions and the ownership rules are clear. Bidirectional work needs more care because either system may change the same record. I define which platform owns each field, how records are matched and what happens when updates conflict or arrive out of order.
The design uses stable identifiers, mapping rules, validation and idempotent operations where appropriate. That means a safe retry should not create a second customer, invoice or task simply because a network request was repeated. The exact controls depend on the systems and action involved.
The integration should fail visibly rather than quietly losing work. Suitable controls can include queued processing, timeouts, safe retries, error logs, alerts and a manual exception route. The important question is not whether a dependency will ever fail, but whether your team can see the problem and recover without damaging the process.
I begin with the sensitivity of the data, the organisations involved and the actions the integration may perform. The agreed design can include scoped credentials, secure secret storage, encrypted transport, input validation, least-privilege permissions, activity records, rate controls and protected deployment. Wider security or compliance requirements are scoped with the business and any relevant specialists.
A custom API integration is usually between £4,000 and £12,000. A simple connector using an established platform may cost less. Real-time, bidirectional, regulated, high-volume or poorly documented systems can cost more and may need paid discovery first. I recommend the smallest sensible route once the platforms, data and failure risks are understood.
A focused integration commonly takes two to eight weeks. Timing depends on API access, supplier cooperation, authentication, data quality, business rules, testing and how quickly representative accounts and information are available. Proving access to the riskiest system early makes the estimate more dependable.
Yes. An agreed support arrangement can cover monitoring, backups where relevant, incident investigation, dependency updates and planned changes. Third-party APIs evolve, so ownership and response expectations should be clear before the connection becomes an important part of daily work.
