ERP Integration API Automation

E‑Invoicing & ERP Integration: Why APIs Are Critical for Modern Businesses

As e‑invoicing mandates spread across the UK, Europe, and other markets, the biggest challenge is not just compliance — but integration. Electronic invoicing only becomes truly powerful when embedded into existing finance systems.

21. May 2026

5 min read

In this article we explain what ERP‑e‑invoicing integration means, how APIs make it scalable, why your business needs an API‑first approach, and how our solution helps integrate with multiple platforms seamlessly.

What Is ERP Integration for E‑Invoicing?

ERP integration means connecting your core business system (e.g., SAP, Business Central, Weclapp) with an e‑invoicing network so that invoices can be generated, converted, validated and transmitted without manual steps.

Generated automatically from transactional data

Converted to structured formats (UBL / XRechnung / Peppol)

Validated and transmitted without manual steps

Received and processed seamlessly in the ERP

Integration eliminates manual exports, copy‑paste jobs, and PDF conversions — ensuring that e‑invoices flow directly between systems.

Why APIs Are Essential

APIs (Application Programming Interfaces) play a key role in modern ERP integration. Most leading providers support REST APIs that allow systems to communicate in real time.

RESTful Integration

Our API supports REST endpoints that allow systems to:

Send invoice data directly in structured JSON/XML payloads
Convert, validate, and route invoices automatically
Track invoice status and delivery logs in real time

This API model is lighter, more scalable and easier to maintain than older file‑based approaches like EDI.

Automation and Workflows

APIs enable end‑to‑end automation with:

Webhook notifications for invoice status changes
Integration into approval and procurement workflows
Near real‑time insight into financial cycles

Integration Approaches for ERP

There are three primary strategies companies use to connect their ERP with e‑invoicing networks:

Certified Access Point Providers

Connect your ERP via an intermediary API provider that handles Peppol routing, validation, and delivery — reducing your compliance burden.

Native ERP Connectors

Some ERP platforms provide built-in connectors — e.g., Business Central apps or SAP Document & Reporting Compliance modules.

Custom API Integration

Using a flexible REST API, businesses can integrate e-invoice capabilities directly into custom ERPs or proprietary systems.

Our API empowers each of these models, ensuring seamless integration regardless of complexity.

Current Integrations We Support

We have already implemented deep integrations with leading ERP platforms and are actively expanding our connector ecosystem.

Already Available

SevDesk
Microsoft Business Central
Weclapp
DATEV
Oracle Netsuite
SAP, etc.

Coming Soon

ScopeVisio
EDISON
Salesforce
Custom ERP connectors, etc.

If your ERP is not yet on the list, we are ready to build the integration with you — thanks to our flexible, API‑driven architecture.

Benefits of API‑Driven E‑Invoicing

Businesses that adopt an API‑enabled e‑invoicing solution typically see improvements across the entire finance function:

Elimination of manual invoice processing

Faster invoice delivery and approvals

Seamless compliance with UK, EU and global mandates

Reduced ERP modernization costs

Greater visibility and analytics across invoicing workflows

Scalable architecture for future mandates

Integration is not just compliance — it is optimization and automation of your entire finance function.

Conclusion

E‑invoicing is becoming a key digital infrastructure component for businesses worldwide. The right ERP integration — powered by APIs — allows companies to stay compliant, scalable, and future‑ready.

Whether you use a major ERP or a custom system, API integration is the most reliable way to adopt e‑invoicing across markets and mandates. Contact our team to discuss your integration requirements.

E‑Invoicing & ERP Integration: Why APIs Are Critical for Modern Businesses

What Is ERP Integration for E‑Invoicing?

Why APIs Are Essential

RESTful Integration

Automation and Workflows

Integration Approaches for ERP

Certified Access Point Providers

Native ERP Connectors

Custom API Integration

Current Integrations We Support

Already Available

Coming Soon

Benefits of API‑Driven E‑Invoicing

Conclusion

Peppol Network

Belgium confirms mandatory B2B e-Invoicing from January 1, 2026

GEBA – Publication of the Specification for Germany’s Electronic Business Address