# invowerk (invowerk.dev)

Creates and validates ZUGFeRD PDF and XRechnung e-invoice files, checking format and business rules against the KoSIT validator.

- Atlas card: https://inite.ai/en/atlas/invowerk.dev
- Site: https://invowerk.dev
- For: German businesses issuing or receiving e-invoices (ZUGFeRD, XRechnung), and software vendors needing validation.
- Categories: finance
- Use 0/100 · alive 100/100

## Used for

- create ZUGFeRD PDF or XRechnung invoices in a form
- check received e-invoices before accepting them
- read e-invoices as readable invoices in a viewer

## Price

- from 9.9 EUR/month (read 2026-10-26 on https://invowerk.dev/pricing)

## For developers

- OpenAPI: https://invowerk.dev/openapi.json (7 paths)
- MCP server: dev.invowerk/xrechnung-e-invoice-validator (namespace; open on 2026-10-26, 6 tools)
- Read 2026-10-26

## MCP server, measured daily

Server: https://api.invowerk.dev/mcp/, checked every day since 2026-10-26 (1 checks).

- Answered: measuring, 1 daily checks so far
- Median first answer: 507 ms
- Sign-in: none
- Context its tool definitions take: about 2436 tokens (6 tools)
- Tool definitions: A, 100/100
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-26

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Source: INITE Atlas, https://inite.ai/en/atlas/invowerk.dev. JSON: https://inite.ai/api/atlas/invowerk.dev. MCP: https://inite.ai/api/mcp (atlas_lookup).