API integrations
Automated data flows, less manual work, more efficiency.
What is API integrations – and why do you need it?
An API (Application Programming Interface) is basically a “dialogue” between two systems. System A says to System B, “Hey, are you getting current customer data?” and System B replies, “Yes, here they are.” This enables automated data flows instead of manual double entries, real-time synchronization (data is up-to-date everywhere), fewer errors (no manual entry), more efficient processes (enter once, not five times), better decisions (consistently updated data). Today, a good integration strategy is not optional – it is a business advantage. Anyone who has their systems connected works faster.
What you get
Payment provider integrations
Stripe, PayPal, Klarna, bank transfer connected to your website or app. Payments are processed automatically, confirmations are posted back to your system - no manual reconciliation, no risk of errors.
Shipping & Logistics integrations
DPD, GLS, DHL connected to your order management. Automatic label generation, tracking updates to customers, shipping cost calculation. Your team places an order, the rest is automatic.
CRM integrations
Salesforce, HubSpot, Pipedrive with your other systems (website, email, calendar). Everything is up to date, the sales team has a complete picture of the customer.
ERP & Warehouse management integrations
SAP, Navision or other production/warehouse systems connected to shop, CRM, accounting. Inventories are up to date everywhere - no overbooking, no stock chaos.
Accounting software integrations
Sage, Exact, Lexware connected to your sales/purchasing systems. Invoices are created automatically, payments are posted - no manual data entry in two systems.
Email & Marketing automation integrations
Mailchimp, Brevo, Klaviyo sync contacts automatically. New customers automatically end up in your list, bounce data is synced again.
Google APIs & Custom integrations
Google Analytics, Sheets, Maps with your systems. Or custom APIs for providers without a ready-made integration - we build an API wrapper so that you can still integrate.
Webhooks & Real-time event trigger
Event-based integration: When something happens in system A, it automatically triggers something in system B. This is faster and more reactive than APIs that just poll periodically.
Monitoring & Error handling
We set up monitoring: If an integration fails, you will be alerted. Retry logic for incorrect requests, fallback systems so that critical processes do not stop completely.
Our process
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1. Phase
Strategy & Analysis
Integration Audit: What systems do you have? Which data should flow where? What API does each system offer? We create an integration plan: What will be connected and how? In what order? With which architecture?
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2. Phase
Conception
API Documentation & Testing: We analyze the APIs of each system. What can we do? What limits are there? Which authentication? Based on this, we design the integration architecture: middleware or direct? Which events trigger what? Error handling and fallback logic?
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3. Phase
Implementation
Development: We build the integrations. API clients, data mapping, transformation, error handling, logging. Continuous testing with you.
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4. Phase
Launch & Acceptance
Testing & Validation: Comprehensive testing with real data. Are all integrations working? Is data consistent? Performance okay? Edge cases covered? Then set up monitoring and fallback systems.
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5. Phase
Support & Support
Monitoring & Optimization: After the launch we monitor data flows, error rates, performance. Optimizations based on real data. Your team will receive training on how to troubleshoot problems.
Who is this ideal for?
E-Commerce & Retail with multiple sales channels
You sell via shop, marketplace (Amazon, eBay), and perhaps offline. Inventories must be synchronized everywhere in real time - otherwise overbooking and angry customers.
Companies with a complex supply chain
Purchasing, production, warehousing, shipping, accounting – everything should mesh together. With good integration: automated, consistent, no errors.
SaaS & Cloud-first companies
Your infrastructure is completely in the cloud. APIs are your nervous system. We build the robust backbone that holds everything together.
Enterprise with many legacy systems
You have old systems that are not modern but are not going away. We build bridges so that old and new systems talk to each other.
B2B companies with partner integrations
Suppliers, distributors, partners – everyone should be able to see into your systems (with access control). We are building the API infrastructure for this.
How much does it cost?
Easy integration
5,000-15,000
one system + another
Medium integration
15,000-40,000
3-4 systems, multiple data flows
Extensive integration
40,000+
5+ systems, complex logic, real time, monitoring
Why digitalists?
Project Manager = Developer
Our PMs are developers themselves. They don't think in terms of technical features, but rather "how do we automate your processes and save your team time?" That makes the difference.
Individual concepts
Not a one-size-fits-all solution. We analyze your systems, your requirements, and build an integration that suits you specifically.
Everything from a single source
Integration planning, API analysis, development, testing, monitoring, support – all from us. One contact, one responsibility.
Experience since 2018
We have been building complex integrations for over six years. We know the common APIs (Stripe, Shopify, Salesforce, etc.) by heart and have also worked with custom/legacy APIs.
FAQs
Can we just use Zapier or Make instead of custom development?
For simple integrations (e.g. newsletter signup in CRM): Yes, Zapier is fast and cheap. But for critical processes (order management, accounting) or complex logic: tailor-made is better. Zapier also costs more in the long run (per integration, per action), has limited error handling, and you are dependent on the provider.
What happens if an integration fails?
Good integration has monitoring and fallback logic. If something goes wrong, you will be alerted. Retry logic retries the request. Fallback systems keep you going. This isn’t “just hoping” – this is engineering.
How long does an integration implementation take?
Rough: 3-5 months for comprehensive integrations. Simple integrations can be 4-6 weeks. This depends on the number and complexity of the systems and how well documented their APIs are.
Can we change or extend the integration later?
Yes. With good architecture, it is easy to add new systems or change existing flows. We document everything so that your team can adjust later (with a little help).
