External API Integration | OutlinePixel Romania

External API integration

We connect your website, online store or application with external services — so data flows automatically between systems, without manual work.

What we integrate

Online payments

Stripe, PayPal, local processors — payment processing directly from your site or store.

CRM and ERP

Client, order and inventory sync with management systems. See our CRM PHP extensions project.

Shipping

Courier services — automatic shipping cost calculation and AWB generation.

Invoicing

Automatic invoice generation when orders are placed.

Email marketing

Mailchimp, Brevo — subscriber sync, automated triggers.

Custom API

Any service with API documentation — we build custom connectors.

How we work

  1. We analyze the external service API (documentation, authentication, limitations)
  2. We design the data flow between systems
  3. We implement the integration and test real scenarios
  4. We monitor and fix any post-launch issues

Pricing

Cost depends on API complexity and number of connected systems. We provide an estimate after requirements analysis — same as our custom software development.