E-Invoice Checker

E-Invoice Checker MCP server

Remote Model Context Protocol server for European e-invoices: detect, parse, validate and render XRechnung, ZUGFeRD, Factur-X, Peppol BIS Billing 3.0, generic EN 16931 UBL/CII and Polish KSeF FA(3) invoices with the official KoSIT, OpenPeppol and KSeF rule sets. Same engine as einvoicechecker.com.

• Endpoint: https://einvoicechecker.com/v1/mcp (Streamable HTTP, stateless)
• Auth: optional API key, Authorization: Bearer ek_… (free key, 100 requests/month). Without a key the anonymous rate limit applies (20 requests/min per IP).
• Registry: com.einvoicechecker/einvoice in the official MCP registry
• Docs: https://einvoicechecker.com/mcp/

Tools

Tool	Does	Cost
detect_invoice	Format, syntax, profile, country standard of a file	1
parse_invoice	Invoice as normalised JSON (parties, lines, VAT breakdown, totals, payment)	1
validate_invoice	Official rules: KoSIT (XRechnung 3.0.2 incl. BR-DE), OpenPeppol BIS 3.0.20, KSeF FA(3). Every failed rule with id, severity, XPath	1
render_invoice_html	Readable A4 document as HTML (en, de, fr, pl, nl)	1
render_invoice_pdf	Readable PDF, returned as a base64 resource	2
my_usage	Plan, quota, usage, subscription of the connected key	0
list_supported_formats	Formats, rule sets, plans	0

Input: content (invoice XML as text) or content_base64 (ZUGFeRD / Factur-X PDF or any invoice file, base64). Files up to 10 MB. Invoices are processed in memory and discarded; nothing from the invoice content is stored.

Connect

Claude Code

claude mcp add --transport http einvoicechecker https://einvoicechecker.com/v1/mcp \
  --header "Authorization: Bearer ek_YOUR_KEY"

Claude.ai / Claude Desktop: Settings → Connectors → Add custom connector → https://einvoicechecker.com/v1/mcp.

Cursor / Windsurf / VS Code (mcp.json):

{
  "mcpServers": {
    "einvoicechecker": {
      "url": "https://einvoicechecker.com/v1/mcp",
      "headers": { "Authorization": "Bearer ek_YOUR_KEY" }
    }
  }
}

stdio clients (via mcp-remote):

{
  "mcpServers": {
    "einvoicechecker": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://einvoicechecker.com/v1/mcp", "--header", "Authorization: Bearer ek_YOUR_KEY"]
    }
  }
}

Example prompts

• "Validate this XRechnung and tell me what the supplier has to fix" (paste the XML).
• "Extract the line items and VAT breakdown of this Factur-X PDF as a table."
• "Is this Peppol invoice compliant with BIS Billing 3.0? List fatal errors only."
• "Render this KSeF invoice as a PDF in English."

Pricing

Free tier 100 requests/month; Starter €24, Pro €49, Business €149 per month. Details: https://einvoicechecker.com/pricing/

Files in this repository

• server.json: the registry manifest published to the official MCP registry.
• server-card.json: static server card also served at https://einvoicechecker.com/.well-known/mcp/server-card.json.

Terms: https://einvoicechecker.com/terms/ · Privacy: https://einvoicechecker.com/privacy/ · Support: [email protected]