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PDF to Factur-X / ZUGFeRD / XRechnung Converter MCP server

Which MCP servers are PDF to Factur-X / ZUGFeRD / XRechnung Converter's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-24

← Back to PDF to Factur-X / ZUGFeRD / XRechnung Converter

Whose server it is
  • Registry namecom.einvoicewiz/einvoicewizverified in the MCP registry

The registry name sits under einvoicewiz.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-24
  • Stateanswerschecked 2026-10-24
  • Tools7
  • Server calls itselfeinvoicewiz
  • Server version1.26.0
  • Protocol version2025-06-18

On 2026-10-24 the server answered initialize and tools/list without a sign-in. First answer in 55 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: Convert existing PDF invoices into Factur-X or XRechnung files; Validate invoice files against the EN 16931 standard.
  • Checked on 4 of the 7 days it takes to judge reliability.

Once connected

  • For "Convert existing PDF invoices into Factur-X or XRechnung files", the likely first call is signup.
  • For "Validate invoice files against the EN 16931 standard", the likely first call is validate_einvoice.
  • create_facturx_pdf change data without a sign-in: anyone with the address can call them.
  • Parameters are untyped or undescribed in 7 of 7 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 4, the first on 2026-10-24
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 4 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring4 of the 7 daily checks it takes to print a share
  • Median first answer203 ms
  • Space in an agent's context≈ 851 tokensthe definitions of all its tools (7), which an agent carries on every turn
  • Tool definitionsC · 67 of 100
  • Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 7 of 7
  • Not saying whether it only reads or can destroy: 7 of 7

What an agent can do with it

  • can do · Convert existing PDF invoices into Factur-X or XRechnung files
  • not sure · Review extracted invoice fields before generating compliant output
  • can do · Validate invoice files against the EN 16931 standard

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

  • Tools that change data, on a server that answers without a sign-in: create_facturx_pdf

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers7 tools · read 2026-10-24
  • signup

    Create an einvoicewiz API key with 20 free credits (no card). The key is shown once — store it.

  • check_credits

    Credits remaining and calls used for an API key.

  • generate_einvoice_xml

    Invoice JSON → validated EN 16931 CII XML (1 credit; failures free). profile: "en16931" (Factur-X/ZUGFeRD data, B2B) or "xrechnung" (German public sector; needs invoice.buyer_reference = Leitweg-ID and seller contact_email/contact_phone)…

  • create_facturx_pdf

    Your existing PDF invoice + invoice JSON → Factur-X / ZUGFeRD PDF/A-3 with embedded XML (1 credit). pdf_base64: the original PDF, base64-encoded (max 15 MB). Returns {pdf_base64, cert_id, verify_url, credits_left}. The output is validated…

  • validate_einvoice

    Validate a Factur-X / ZUGFeRD / XRechnung file (PDF or XML, base64) against EN 16931 + KOSIT + PDF/A (1 credit). Returns the rule-level report {result:{status, errors[], warnings[], profile}, verify, credits_left}. verify is set only when…

  • lookup_certificate

    Look up a verification certificate (EIW-…) — free, no key. Confirms which file hashes passed validation and when.

  • which_format_do_i_need

    Decision helper (free, no key): which e-invoice format a recipient needs and whether a plain PDF is still acceptable.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "einvoicewiz": {
      "type": "http",
      "url": "https://einvoicewiz.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http einvoicewiz https://einvoicewiz.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://einvoicewiz.com/mcp as a custom connector in the settings.

OpenAPI spec

7 paths, read 2026-10-24. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.