What Is an API Integration?
An API integration connects two or more systems so they can automatically exchange data. For example, an e-commerce order can be sent to ERP, stock levels can update from a warehouse system, and payment status can be transferred to accounting.
A properly built API integration reduces manual work, prevents data duplication and allows different business systems to work as one ecosystem.
Systems We Can Integrate
ERP Systems
Orders, customers, invoices, products, stock levels, documents and business process data.
CRM Systems
Customers, leads, sales stages, contacts, tasks and communication.
E-commerce Stores
Products, orders, customers, payments, stock, shipping and product synchronization.
Warehouse Systems
Stock levels, product movement, locations, reservations, inventory and picking.
Accounting Software
Invoices, payments, customers, documents, VAT, financial data and reports.
Couriers & Payments
Shipments, parcel lockers, labels, tracking numbers, payment statuses and shipping prices.
Benefits of API Integrations
Less Manual Work
Data is transferred automatically, so there is no need to manually copy orders, customers, stock levels or invoices.
Fewer Errors
Automated data exchange reduces mistakes caused by entering the same data into multiple systems.
Faster Processes
Orders, stock, payments and documents update faster, helping your team work more efficiently.
Clearer Data
Systems share consistent data, making it easier to make decisions and avoid mismatches.
Automation
Integrations can automatically create documents, shipments, invoices, tasks or notifications.
Easier Scaling
Once an API structure is in place, it becomes easier to connect new tools and automate more processes.
Manual work, plugin or custom API integration?
The right integration approach depends on data volume, process complexity, error tolerance and future expansion plans.
Manual data entry
Orders, customers and stock are copied by hand, so mistakes and delays appear more often.
Standard plugin
Works for simple cases, but often lacks custom business logic, error control and flexibility.
Custom API integration
Data exchange is adapted to your processes, systems, user roles and future expansion.
API integration methods we can build
Integrations may work in real time, on a schedule, through webhooks or through controlled data import and export. The technical solution is selected according to the systems being connected and the business process.
- REST API integrations
- Webhook integrations
- Scheduled synchronisations
- CSV / XML / JSON imports
- Data export to other platforms
- Custom API endpoints
E-commerce Integrations
An online store can be integrated with ERP, warehouse, accounting, CRM, payment providers, couriers, parcel lockers and supplier catalogs. This allows products, prices, stock levels, orders, payments and shipments to update automatically.
Integration is especially important when the store has many products, stock changes frequently, orders must be transferred to an internal system or several sales channels need to be connected.
ERP and CRM Integrations
ERP and CRM integrations allow customer, sales, order, invoice, stock and document data to move automatically between systems. For example, a CRM lead can become a sales order in ERP, while an ERP invoice can appear in the customer profile.
- Customer synchronization
- Order transfer
- Invoice and document exchange
- Sales statuses
- Stock and product data
- Sales manager tasks
Warehouse and Stock Integrations
Warehouse integrations allow automatic synchronization of stock levels, product reservations, picking, inventory and product movement. This is especially important for e-commerce, manufacturing companies and businesses with multiple warehouses or sales channels.
- Stock synchronization
- Product reservations
- Order picking
- Inventory
- Multiple warehouses
- Product movement
Payment and Courier Integrations
Payment and courier integrations automate payments, payment statuses, delivery prices, parcel locker selection, shipping label generation and tracking numbers. These integrations reduce administrative work and speed up order fulfillment.
- Payment statuses
- Bank payments
- Card payments
- Courier orders
- Shipping labels
- Tracking numbers
Custom API Development
When a system does not have a ready API or a new data exchange method is required, we can develop a custom API. This allows your system to securely send data to other platforms, mobile apps, customer portals or internal tools.
A custom API can include authentication, permissions, data filtering, limits, error logs, documentation and a clear structure for future development.
Security and Error Handling
In API integrations, it is important not only to exchange data, but also to ensure security, authentication, error logging, data validation and stable operation. A poorly built integration can cause incorrect stock levels, lost orders or security risks.
- API keys and authentication
- Data validation
- Error logs
- Retry logic
- Access management
- Secure data transfer
API Integration Development Process
01
Analysis
We identify which systems need to be connected, what data should move and what API documentation is available.
02
Data Logic
We plan data fields, synchronization direction, authentication, error handling and operating scenarios.
03
Development
We build the integration, test data exchange, fix issues and optimize performance.
04
Launch
We launch the integration, monitor operation, verify data and make adjustments when needed.
How Much Does an API Integration Cost?
The price of an API integration depends on the number of systems, API documentation quality, data structure, authentication, error handling, synchronization frequency and business logic. Simpler integrations can start from €900, while more complex projects are quoted individually.
From €900
Standard development rate – €60/hour.
Related Services
Frequently Asked Questions About API Integrations
What is an API integration?
An API integration connects different systems so they can automatically exchange data such as orders, customers, stock levels, payments, invoices or shipments.
What systems can be integrated?
CRM, ERP, warehouse systems, e-commerce stores, accounting software, payment platforms, couriers, supplier catalogs, internal systems and third-party platforms can be integrated.
Can an online store be connected with ERP or warehouse software?
Yes. We can connect an online store with ERP, WMS, accounting, CRM, suppliers, couriers and other systems so orders, stock and products synchronize automatically.
Can you develop a custom API?
Yes. We can create a custom API for your system so it can connect with other platforms, mobile apps, customer portals or internal tools.
Do you maintain existing integrations?
Yes. We can maintain, fix, optimize and take over existing API integrations if the required access and documentation are available.
How much does an API integration cost?
Pricing depends on the number of systems, API documentation, data complexity, authentication, error handling and synchronization logic. Simpler integrations can start from €900.
Need an API Integration?
Tell us which systems you want to connect, and we will suggest the best integration structure, data logic and technical solution.
Contact Us →