ZUGFeRD Validator MCP Server

by zugferd-validator Your server? Claim it

answering

ZUGFeRD Validator is answering right now. Last checked 8 min ago. 165 installs a week from npm. It exposes 5 tools.

Validiert E-Rechnungen (ZUGFeRD/Factur-X, XRechnung) gegen EN 16931 mit Korrekturvorschlägen.

The linked repository no longer exists on GitHub — it was deleted or made private.

Installs per day peak 23 · avg 12 · -20% w/w

a month agotoday

Uptime history 91 days of history · worst day 96%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

102 ms

Response time

average over 24h

165

Installs / week

npm and PyPI

What changed 5

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 13 August 2026. No other catalogue keeps this.

30 Oct a tool description was rewritten create_invoice

30 Oct a tool changed the parameters it asks for create_invoice

28 Aug a tool appeared validation_report

13 Aug a tool changed the parameters it asks for2 times that day create_invoice

and 1 more, back to 13 August 2026

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add validator --transport http https://api.zugferd-validator.de/mcp

Settings → Connectors → Add custom connector, then paste this address

https://api.zugferd-validator.de/mcp

~/.codex/config.toml

[mcp_servers.validator]
url = "https://api.zugferd-validator.de/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "validator": {
      "url": "https://api.zugferd-validator.de/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "validator": {
      "type": "http",
      "url": "https://api.zugferd-validator.de/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

consistency

check_consistency

Prüft ob die sichtbaren PDF-Daten mit den eingebetteten XML-Daten übereinstimmen.

extract

extract_xml

Extrahiert die eingebettete XML-Datei aus einem ZUGFeRD/Factur-X PDF.

invoice

create_invoice

Erstellt aus strukturierten Daten eine gültige E-Rechnung, als ZUGFeRD-PDF (PDF/A-3 mit eingebettetem XML) oder als XRechnung-XML. Unterstützt mehrere Positionen, durchlaufende Posten, Rabatte und Zuschläge, Leistungszeitraum, schon gezahlte Beträge, Steuernummer, SEPA-Lastschrift und Anlagen. Anlagen stecken Base64-kodiert in der Rechnung und machen Aufruf und Antwort groß; schick hier nur kleine. Mit Anlagen enthält die ZUGFeRD-Antwort nur pdf_base64, das XML steckt in der PDF (extract_xml holt es). Wir speichern nichts.

validate

validate_invoice

Validiert eine E-Rechnung (ZUGFeRD/Factur-X PDF oder XRechnung XML) gegen EN 16931 und gibt strukturierte Ergebnisse mit Korrekturvorschlägen zurück.

validation

validation_report

Erzeugt aus einer E-Rechnung einen Validierungsbericht als PDF (PDF/A-3b) zum Ablegen und Weitergeben. Der Bericht nennt Ergebnis, alle Meldungen mit Regel-ID und Feld, den Prüfzeitpunkt, Format und Profil, die SHA-256-Prüfsumme der geprüften Datei sowie die Versionen der Prüfwerkzeuge. Auf Wunsch wird die geprüfte Rechnung sichtbar angehängt. Gibt das PDF base64-kodiert zurück. Ab dem Tarif Automatisieren.

Endpoints

URL	Transport	State	Latency	Checked
https://api.zugferd-validator.de/mcp	streamable-http	answering	105 ms	8 min ago

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answering

ZUGFeRD Validator — questions

Answers built from our own checks of this server.

What can ZUGFeRD Validator do?

It exposes 5 tools, read directly from the server on our last check. Among them: check_consistency, create_invoice, extract_xml, validate_invoice, validation_report. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is ZUGFeRD Validator working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 102 ms. The bar chart above shows every period we have measured.

Is ZUGFeRD Validator still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect ZUGFeRD Validator?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does ZUGFeRD Validator need an API key?

No. ZUGFeRD Validator completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is ZUGFeRD Validator?

It answers our handshake in 102 ms on average, which is faster than 92% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use ZUGFeRD Validator?

The npm package zugferd-mcp-client was installed 165 times in the last week. Week over week that is -20%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.