Thelawin

The product is an API that generates ZUGFeRD and Factur-X compliant e-invoices from JSON input, producing valid PDF/A-3 files. It solves the problem of creating legally compliant electronic invoices for businesses facing the 2025 e-invoicing mandate. It targets developers and finance teams in small to large companies, as well as B2B contexts. It is delivered as a stateless, GDPR-compliant API with no data storage, supporting multiple European formats from a single JSON payload.

Key features

• Generates ZUGFeRD 2.4 and Factur-X 1.0.8
• Supports EN 16931 compliance
• Converts JSON to PDF/A-3
• Supports multiple European formats
• No data storage, GDPR compliant
• Official SDKs for 8 languages
• MCP server for AI agents
• Three templates: Minimal, Classic, Compact
• Interactive demo with sandbox mode
• Stream API for faster responses