API integration services
Our API integration services keep your CRM, ERP and SaaS tools in sync, so a change in one system shows up correctly everywhere else. Your teams stop re-typing data, and processes that cross departments run without handovers by email.
What it is and when it fits
API integration work connects applications through their APIs and webhooks: syncing customers and deals between CRM and ERP, pushing orders into fulfilment, sending invoices to accounting, or exposing your own platform to partners. We handle authentication, field mapping, rate limits, retries and conflict rules, and log every sync so any record can be traced. Where you offer an API yourself, we design and document it for external developers.
Integration platforms such as n8n, Zapier or Make are a sensible choice for low-volume flows between popular tools, and we build on them when they fit. Custom integration code is the better route for high volumes, complex mappings, two-way sync with conflict handling, or systems that platforms support poorly. We look at volume, criticality and who will maintain it, and recommend per integration.
What we build
CRM and ERP sync
Accounts, contacts, products, quotes and orders kept consistent between systems such as HubSpot, Salesforce, SAP and Odoo.
Webhook and event handling
Reliable receivers that verify, queue and process events from payment, e-commerce and SaaS platforms without losing messages.
Two-way synchronisation
Sync in both directions with clear rules for which system wins, duplicate detection and reconciliation reports.
Public and partner APIs
Documented REST or GraphQL APIs with authentication, versioning and usage limits, so partners can build on your platform.
Workflow platform integrations
n8n, Zapier and Make flows set up with error handling and monitoring, for connections that do not need custom code.
Integration monitoring
Dashboards and alerts for failed syncs, API errors and rate limits, with the ability to replay failed messages.
Standard connector, integration platform or custom code.
| Route | Fits when | Watch for |
|---|---|---|
| Standard connector from one of the vendors | Both systems are widely used and your process matches the connector's defaults | Fixed field mappings, little detail when a record fails, changes on the vendor's timetable |
| Integration platform such as n8n, Make or Zapier | Volume is low to moderate, mappings are simple and someone in your team owns the flows | Usage-based costs that grow with volume, and error handling that has to be added on purpose |
| Custom integration code | High volume, two-way sync with conflict rules, older or poorly supported systems, or full logs | It needs an owner for hosting, monitoring and vendor API changes |
We recommend per integration and often mix routes: a connector where it covers the process, a platform flow for simple notifications and custom code for the sync that has to hold up at volume. For a plain-language explanation of how integrations work and where they fail, read API integrations explained.
How it works
- 01
Map systems and data
We document which systems hold which data, who owns each field and how often changes need to flow.
- 02
Pick the integration route
For each connection we choose between an integration platform and custom code, and agree how conflicts are resolved.
- 03
Build, test and backfill
Integrations are tested against sandbox environments, then historic data is migrated and checked before live sync starts.
- 04
Monitor once it's live
Alerts, logs and replay tools go live with the integration, and we adjust as vendors change their APIs.
Related work
Built with
All technologiesFurther reading
API integrations explained, with examples
An API integration lets two systems exchange data without anyone re-typing it. How one works, examples from finance and operations, the ways to get one built, what can go wrong and what drives the cost.
10 min read
How to automate your business processes
How to automate business processes one at a time: pick a repetitive process, measure it, decide between rules and AI for each step, and run it alongside your team before it takes over.
10 min read
Common questions
An iPaaS is quicker for straightforward, low-volume flows between well-supported tools. Custom code gives more control, lower running costs at scale and better handling of complex logic and errors. The choice depends on volume, how critical the flow is and who maintains it.
We build against versioned APIs where available, monitor error rates and deprecation notices, and cover each integration with tests. When a vendor changes something, failures are caught quickly and fixed under a support agreement or by your team.
Credentials live in a secrets manager, each connection uses the least access it needs, webhooks are signature-verified and data moves over encrypted channels. We log access and keep personal data out of logs where possible.
The number of systems and record types involved, the quality and documentation of their APIs, one-way or two-way sync, volume, error handling and monitoring, and any data migration. A single one-way connection is small, while a multi-system sync with conflict rules takes considerably more work. We agree scope and cost in a written plan after discovery.