Factur-X by Orvel

Factur-X MCP server

Generate, validate and read Factur-X / EN 16931 e-invoices (France, EU) from any MCP client.
Remote server, no install. PDF/A-3 · CII · UBL 2.1 · French fr-ctc rules.

Docs · MCP guide · Pricing (free key, no card) · Conformity report · Status

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Endpoint: https://facturx.orvel.dev/mcp (Streamable HTTP, stateless) Registry: io.github.LeBorgneAntoine/facturx on the official MCP registry

France makes electronic invoicing mandatory for all VAT-registered businesses (receiving from September 2026, issuing 2026–2027). Factur-X is the hybrid PDF + XML format of that reform. This server lets an AI agent in Claude, Cursor, VS Code, ChatGPT or your own app produce, check and read compliant invoices without writing an integration.

Tools

Tool	What it does
generate_invoice	Invoice JSON → Factur-X PDF/A-3, CII XML or UBL XML. Profiles MINIMUM → EXTENDED, EN 16931, FR/EN rendering
embed_xml	Attach a Factur-X XML to your own PDF and produce a valid PDF/A-3
validate_invoice	XSD + EN 16931 schematron (+ French fr-ctc), structured findings with rule ids
extract_invoice	Read a PDF or XML e-invoice: parties, totals, VAT breakdown, lines

Resources: facturx://schema/invoice (JSON Schema of the invoice object) and facturx://guide/french-reform.

All tools are readOnlyHint / idempotentHint. Nothing is stored server-side. initialize, tools/list and resources/* work without a key so you can inspect the server before choosing a plan.

Connect

Get a key at facturx.orvel.dev/docs/pricing (Free plan: 50 documents/month, no card) and send it as Authorization: Bearer <key>.

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "facturx": {
      "url": "https://facturx.orvel.dev/mcp",
      "headers": { "Authorization": "Bearer YOUR_KEY" }
    }
  }
}

VS Code (.vscode/mcp.json)

{
  "servers": {
    "facturx": {
      "type": "http",
      "url": "https://facturx.orvel.dev/mcp",
      "headers": { "Authorization": "Bearer YOUR_KEY" }
    }
  }
}

Claude Code

claude mcp add --transport http facturx https://facturx.orvel.dev/mcp --header "Authorization: Bearer YOUR_KEY"

Claude Desktop (custom connectors cannot send headers yet, so bridge with mcp-remote)

{
  "mcpServers": {
    "facturx": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://facturx.orvel.dev/mcp", "--header", "Authorization: Bearer ${FACTURX_KEY}"],
      "env": { "FACTURX_KEY": "YOUR_KEY" }
    }
  }
}

More clients (Python SDK, AgenticMarket pay-per-call) in the MCP guide.

Example prompts

• "Generate a Factur-X invoice for this quote: seller Atelier Numérique SAS (SIREN 732829320, VAT FR40732829320, Paris), buyer Boulangerie Dupont (SIREN 552081317, Lyon), 1 × website development 2500 EUR HT at 20 %, 12 months hosting at 15 EUR, due in 30 days."
• "Validate the attached supplier invoice against the French rules and explain each failing rule in plain words."
• "Extract the totals and VAT breakdown from these three PDFs and give me a table."

Conformity

Every published sample is validated by an independent engine (Mustangproject, the reference open-source Factur-X validator): XSD, EN 16931 schematron, French CTC rules, PDF/A-3 with the embedded factur-x.xml. Reports and reproduction steps: Conformity.

REST API

The same engine is available as a REST API (/v1/invoices/generate, /v1/validate, /v1/extract, OpenAPI at /openapi.json). One key, both interfaces, one quota. See the API reference.

About

Built and operated by Orvel (Antoine Le Borgne, France). Hosted in the EU (Railway, Amsterdam). Support: support@orvel.dev.

This repository holds the public manifest (server.json), brand assets and client examples of the hosted server. The engine itself is closed source.