InvoiceIn

Reads and validates any European e-invoice a business receives — XRechnung, UBL, CII, ZUGFeRD/Factur-X PDF, Peppol BIS 3, FatturaPA, KSeF FA(3) — into…

CommunityDegradedNo sign-inGlobalFreeRead-only

What it can do

  • Read Invoice: Parse any European e-invoice into canonical EN 16931 JSON and validate it against the official rule sets. Returns the detected format, the invoice as one JSON shape regardless of syntax,
  • Validate Invoice: Validation only: which rule sets were applied (XSD, EN 16931, XRechnung, Peppol, arithmetic), the errors and warnings with fix hints, and the invoice header. Cheaper to read than rea
  • Invoice To Html: Human-readable HTML rendering of the invoice (self-contained, printable), same layout for every syntax; labels in the requested language.

What data it sees

Do you need an account

No: the server works without sign-in

Reads and validates any European e-invoice a business receives — XRechnung, UBL, CII, ZUGFeRD/Factur-X PDF, Peppol BIS 3, FatturaPA, KSeF FA(3) — into canonical EN 16931 JSON with plain-language fix hints in EN/DE/PL/IT/FR, plus PDF, CSV and DATEV export. Nothing is stored; works without a key on a small daily quota.

How to connect

How to connect InvoiceIn to Claude

The server address to paste into Claude settings:

https://invoicein--peculiar-systems.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect InvoiceIn to ChatGPT

The server address to paste into ChatGPT settings:

https://invoicein--peculiar-systems.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect InvoiceIn to Cursor

The server address to paste into Cursor settings:

https://invoicein--peculiar-systems.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (5)

Raw names from tools/list. Only developers need these.

read_invoiceParse any European e-invoice into canonical EN 16931 JSON and validate it against the official rule sets. Returns the detected format, the invoice as one JSON shape regardless of syntax, and a validation report whose failed rules carry plain-language fix hints.
validate_invoiceValidation only: which rule sets were applied (XSD, EN 16931, XRechnung, Peppol, arithmetic), the errors and warnings with fix hints, and the invoice header. Cheaper to read than read_invoice when you only need a verdict.
invoice_to_htmlHuman-readable HTML rendering of the invoice (self-contained, printable), same layout for every syntax; labels in the requested language.
invoice_to_csvFlat CSV of the invoice: one row per line item, or one row per document.
invoice_to_datevDATEV Buchungsstapel (EXTF 700) text for the incoming invoice: one booking row per VAT-rate group, automatic expense accounts by SKR. Verify account mapping with the tax advisor before import.