API Integration & Data Sync Services
Connect the systems you already pay for, such as ecommerce, POS, accounting, CRM, payments and messaging, so orders, stock and customer data move on their own instead of being re-keyed.
When re-keying data is someone's full-time job
Most growing businesses run on several good tools that do not talk to each other. Orders from the website are typed into accounting, stock is updated by hand in two places, and leads are copied from forms into the CRM. Each copy is a chance for a mistake: oversold stock, wrong invoices, missed follow-ups.
An integration connects those systems through their APIs, so a change in one appears in the other within seconds or on a schedule. It is usually the cheapest way to fix a process without replacing the software your team already knows.
Integrations we build
- Ecommerce and POS: Shopify, WooCommerce, Square, Etsy and marketplaces: stock, orders and products kept in sync across channels.
- Accounting: QuickBooks and Xero: invoices, payments and customers created automatically from orders.
- CRM and marketing: Website forms, calls and bookings sent to your CRM with the right owner and follow-up.
- Payments: Payment gateway integration for checkouts, deposits, invoices and subscriptions.
- Messaging: WhatsApp, SMS and email notifications triggered by real events, such as an order shipped or a booking confirmed.
- Logistics and e-invoicing: Carrier rates, labels and tracking, plus e-invoicing connections where a country requires them.
Off-the-shelf connector or custom integration?
| Ready-made connector or Zapier/Make | Custom integration | |
|---|---|---|
| Best when | Common tools, simple one-way data, low volume | Custom rules, two-way sync, high volume or a system without a ready connector |
| Ongoing cost | Monthly fees that grow with tasks or orders | Hosting and maintenance; no per-task fees |
| Error handling | Basic retries | Retries, alerts, logs and a queue for failed records |
If a ready-made connector does the job, we will recommend it. We build custom when the rules, volume or systems need it.
How an integration project runs
-
1
Map the data
Which system owns each record, which fields move, in which direction and how often.
-
2
Check the APIs
We test access, limits and data quality on both sides before quoting.
-
3
Build and test
Built with retries, logging and alerts, then tested against real records in a safe environment.
-
4
Go live and monitor
Switched on with monitoring, so failed syncs are caught before customers notice.
What an API integration costs
DevGlim integrations start from $500, and a normally scoped integration typically falls in the range of $500–$1,500. Two-way sync across several systems, legacy systems without APIs and high-volume pipelines are quoted to scope.
What you always get
- You own the source code, the data and the accounts the system runs on.
- A written scope with a price and timeline per phase before work starts.
- Working software to review at every milestone, not one reveal at the end.
- Documentation, so another team could maintain the system later.
Frequently asked questions
How much does an API integration cost?
DevGlim integrations start from $500 and usually fall between $500–$1,500. The price depends on the number of systems, the direction of sync, the quality of each API and the volume of records.
Can you sync inventory between Square, Shopify and Etsy?
Yes. We set one system as the source of truth for stock, then update the others whenever a sale or adjustment happens, with alerts if a sync fails.
What if one of our systems has no API?
There are often other routes, such as scheduled file exports, database access or email parsing. We check what is possible before quoting.
Should we use Zapier instead?
For simple, low-volume flows between common tools, often yes. Custom integration makes sense when rules are complex, volume makes per-task pricing expensive, or reliability matters.
Who maintains the integration?
We offer ongoing support, and because you own the code and documentation, your own team or another developer can take it over.
Related guides and services
- Spreadsheet & Access Replacement — Move the spreadsheet or Microsoft Access database your business depends on into a secure web application that the whole team can use at once, from any device, with your data migrated and checked.
- B2B Ordering Portals — Let trade customers order online at their own prices, reorder in seconds and see invoices and order status, with every order flowing straight into your inventory and accounting.
- n8n workflow automation
- Make & Zapier automation
- AI workflow automation
Pricing
API integrations from $500
Typical investment: $500–$1,500+
Final pricing depends on features, integrations, design complexity and project requirements. Complex projects are quoted based on scope.
Ready to Talk It Through?
Tell us about your workflow and we'll come back with a tailored proposal within 24 hours.
See pricingGet a scoped estimate
Tell us what you need. We reply within 24 hours with questions, next steps and a realistic cost range.
- A clear scope and cost range before you commit
- Fixed-scope proposal or phased estimate
- You own the code and the data
Thanks, your enquiry is in.
We'll reply within 24 hours.
