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What is Oxygen Peppol API?

Oxygen is a certified Peppol Access Point provider that enables electronic invoicing to the Greek public sector through the Peppol network.

The Oxygen Peppol API is a comprehensive RESTful API that handles the complete lifecycle of electronic invoicing through the Peppol network.

As the only Greek e-invoicing provider authorized to transmit invoices on behalf of foreign suppliers to the Greek public sector via Peppol, Oxygen operates in full compliance with the GRCI requirements defined by the Greek Tax Authority (AADE).

It provides:

  • Invoice Creation: Build UBL 2.1 compliant invoices with automatic validation
  • Transmission Management: Send invoices through the Peppol network to any participant
  • Status Tracking: Monitor invoice delivery, acknowledgments, and responses
  • Compliance: Automatic validation against Peppol BIS Billing 3.0 and EN 16931 standards

API Features

  • International Invoicing
  • Support for all Peppol participant countries
  • Automatic endpoint resolution
  • Multi-currency support
  • Real-time transmission tracking
  • KED Compliance: Integration with Greek Interoperability Gateway (Κέντρο Διαλειτουργικότητας)
  • Soft Reject Handling: Partial invoice corrections for KED requirements

Use Cases

  • Cross-border invoicing within the Peppol network
  • Submitting invoices to the Greek Public Sector
  • Businesses that require compliance with European e-invoicing standards
Installation

Getting started

To begin integrating with the Oxygen Peppol API, you will need an API key. Please contact our sales team to initiate the onboarding process and receive your credentials.

Contact our sales team

Guides

Installation

Get up and running with the API in minutes.

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Pagination

Understand how to work with paginated responses.

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Errors

Read about the different types of errors returned by the API.

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Webhooks

Learn how to programmatically configure webhooks for your app.

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Released under the MIT License.