API Integration: Payments, Shipping, Marketplaces and e-Invoicing
Orders in one system, invoices in another, shipping in a third panel… With API integrations we connect these systems and eliminate manual copying.
Which integrations we build
This page focuses on technical integrations between operational systems: payment providers, shipping carriers, marketplaces, e-invoice integrators, accounting and ERP software, currency and stock services.
To connect customer data to your CRM see our CRM Integration page; to connect tools with visual workflows see n8n Automation.
Common reasons teams reach out
Marketplace orders are copied into ERP by hand
Tracking numbers are sent to customers one by one
Invoices are retyped from order data
Stock looks inconsistent across channels
The existing integration is undocumented and breaks often
What this service improves
- Enter data once, from order to invoice
- Consistent stock and prices across channels
- Fewer wrong or missing records
- Documented, monitored, maintainable integrations
Example use cases
- Virtual POS / payment provider integration
- Shipment creation and tracking notifications
- Marketplace order and stock sync
- e-Invoice / e-Archive generation
- Account and order transfer to accounting/ERP
- Automatic price updates by exchange rate
What we deliver
- Integration and field mapping document
- Error handling, retry and logging
- Integration validated in a test environment
- Monitoring and failure alerts
- Technical documentation and maintenance option
Tools and integrations
Implementation plan
- 01
Discovery
We review API docs, permissions and limits of the systems.
- 02
Data mapping
We define which field moves where and on which trigger.
- 03
Build and test
We validate the integration with real scenarios in a test environment.
- 04
Go-live and monitoring
We go live with monitoring that tracks and reports failures.
How we measure results
Manual transfers
Records moved between systems by hand.
Failed operations
Failed or retried integration calls.
Sync time
How long a change takes to reach the other system.
Custom Software
Frequently Asked Questions
What if our software has no API?
We look for file exchange (CSV/XML), database access or another supported method. If none exists, we say so clearly.
Do you build marketplace integrations?
Yes, order, stock and price integrations through marketplace APIs. We assess the marketplaces you use during the analysis.
How will we know if an integration fails?
Failures are logged, retried automatically and reported to the responsible person.
Can you take over a broken integration?
Yes. We review the existing code and logs and decide together whether to fix or rewrite it.
Let’s review your process together
In a free 30-minute analysis we identify what can be improved and how.