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OpenAPI Specification

openapi: 3.2.0
info:
  title: einvoicewiz e-invoice Facturx API
  version: 1.0.0
  description: Generate and validate EN 16931 e-invoices (Factur-X / ZUGFeRD 2.x PDF/A-3, XRechnung 3.0) for the German and French mandates. Deterministic pipeline (no AI), Mustang rule engine, failed validations are never charged. Every passing file gets a permanent verification certificate. 20 free credits on signup, then €9 / 500 credits.
  contact:
    email: support@einvoicewiz.com
  termsOfService: https://einvoicewiz.com/terms
servers:
- url: https://einvoicewiz.com
tags:
- name: Facturx
paths:
  /v1/facturx:
    post:
      summary: Your PDF + invoice JSON → Factur-X / ZUGFeRD PDF/A-3 (1 credit)
      security:
      - ApiKey: []
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              required:
              - pdf
              - invoice
              properties:
                pdf:
                  type: string
                  format: binary
                invoice:
                  type: string
                  description: Invoice JSON as a string
      responses:
        '200':
          description: PDF/A-3 binary. Headers X-Cert-Id and X-Verify-URL carry the certificate.
          content:
            application/pdf: {}
        '422':
          description: Validation or embedding failed — not charged
      tags:
      - Facturx
      operationId: postV1Facturx
      x-operation-id-source: derived
components:
  securitySchemes:
    ApiKey:
      type: apiKey
      in: header
      name: X-API-Key