E-Invoice Mandate Lint - EU 2026

Lints UBL and CII invoice XML against EN 16931 and the national e-invoicing mandates that are live in 2026

Install

npx @readystack/einvoice-mandate-lint file

Node 18+. The same 35 rules as the VS Code extension, from a terminal or CI.

Free

• Lint the invoice XML you have open - every EN 16931 core field plus the country mandate rules its CustomizationID and seller country select, reported with line numbers.
• --rules lists every rule

With a licence ($29 once)

• Scan every invoice XML in the workspace in one pass and export the findings as JSON, CSV or SARIF you keep and run in CI.

@readystack/einvoice-mandate-lint --dir ./templates --report html --out report.html

An EN 16931 / Peppol integration consultant reviews an invoice mapping at about $170 an hour.

Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "einvoice-mandate-lint": { "command": "npx", "args": ["-y", "@readystack/einvoice-mandate-lint", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence). The agent gets every finding with the line number.

Use in CI

- name: E-Invoice Mandate Lint - EU 2026
  run: npx -y @readystack/einvoice-mandate-lint --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/einvoice-mandate-lint --dir /work --ci)

The folder sweep, reports and CI mode need one licence — one payment, no subscription. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence