DDD Invoices

DDD Invoices EUeInvoices API

Single JSON API for issuing, receiving, and archiving locally compliant invoices — e-invoicing, PEPPOL exchange, fiscalization, and real-time tax reporting across 30+ countries. Uses a custom IoT connection-key header for authentication with distinct TEST and PROD keys per legal entity.

GitHub

Documentation

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Documentation
https://dddinvoices.com/documentation-e-invoicing
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APIReference
https://api.dddinvoices.com/public-api-playground
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/ddd-invoices/refs/heads/main/authentication/ddd-invoices-authentication.yml

Other Resources

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APIsJSON
https://raw.githubusercontent.com/api-evangelist/ddd-invoices/refs/heads/main/apis.yml

API entry from apis.yml

apis.yml Raw ↑ 
name: DDD Invoices EUeInvoices API
description: Single JSON API for issuing, receiving, and archiving locally compliant invoices — e-invoicing,
  PEPPOL exchange, fiscalization, and real-time tax reporting across 30+ countries. Uses a custom IoT
  connection-key header for authentication with distinct TEST and PROD keys per legal entity.
humanURL: https://dddinvoices.com/documentation-e-invoicing
baseURL: https://app.dddinvoices.com/api/service/
properties:
- type: Documentation
  url: https://dddinvoices.com/documentation-e-invoicing
- type: APIReference
  url: https://api.dddinvoices.com/public-api-playground
- type: Authentication
  url: authentication/ddd-invoices-authentication.yml