What is beliq-validate-einvoice?

A validation tool for European electronic invoices, including XRechnung, ZUGFeRD, Factur-X, Peppol BIS, UBL, and CII documents. It checks invoices against the official rules for their format and profile.

Use it to validate an invoice file, identify its format and checked ruleset, and understand every reported failure.

It identifies whether an electronic invoice is compliant and explains the specific rules it breaks, instead of requiring manual inspection of complex invoice files.

beliq-validate-einvoice — Skill for Claude Code and Codex by beliq-eu

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add beliq-eu/beliq-mcp --skill skill

Clone the repo

git clone --depth 1 https://github.com/beliq-eu/beliq-mcp

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/beliq-eu/beliq-mcp/skill/github.svg)](https://agentmods.dev/skills/beliq-eu/beliq-mcp/skill)

Your own site

<a href="https://agentmods.dev/skills/beliq-eu/beliq-mcp/skill"><img src="https://agentmods.dev/badge/skills/beliq-eu/beliq-mcp/skill/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/beliq-eu/beliq-mcp/skill"><img src="https://agentmods.dev/badge/skills/beliq-eu/beliq-mcp/skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,583 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.01583
Opus 5.5	$0.00000	$0.00633
Sonnet 5.5	$0.00000	$0.00317
Haiku 4.5	$0.00000	$0.00158

Measured today against content hash b5c69708fdf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

beliq-validate-einvoice scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skill/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

beliq: validate EU e-invoices

Use the beliq MCP server to validate an EU electronic invoice and explain the result. beliq checks a document against the rule packs and schemas it runs for that format and returns a verdict: whether it is valid, how deep the check went, the format and profile it detected, the ruleset versions it was checked against, and every rule that failed. The depth differs by format, from the authority's own rules down to structure only, and the result says which.

When this applies

The user has an e-invoice (or a path to one) and wants to know if it is valid, or wants the failures explained. The document can be:

Invoice XML (XRechnung, Peppol BIS, and the other formats beliq carries).
A Factur-X / ZUGFeRD PDF (a PDF with embedded invoice XML); pass it by file path. The verdict is then about the embedded XML: the PDF itself is not checked.

This skill focuses on validation. To parse a document into a structured invoice, generate one, or convert between formats, the same beliq MCP server exposes beliq_parse_einvoice, beliq_generate_einvoice, and beliq_convert_einvoice.

Prerequisite: the MCP server

The tools come from the beliq-mcp server. If it is not already configured, install it once:

claude mcp add beliq -e BELIQ_API_KEY=blq_your_key -- npx -y beliq-mcp

Create the API key in the beliq dashboard under API Keys. To send the key as a bearer token instead of X-API-Key, add -e BELIQ_AUTH=bearer.

Tools

beliq_validate_einvoice - the primary tool. Inputs:
- document - the invoice as XML text, OR
- documentPath - a path to an XML or Factur-X/ZUGFeRD PDF file on disk (provide exactly one of these two).
- format (optional) - auto (default, detects the format), or another value the tool's input schema lists: cii, ubl or one of the national formats.
- franceCtc (optional) - set true to also apply the French CTC rules (BR-FR-CTC).
beliq_check_account - verifies the configured key and reports the plan, the remaining quota, and whether the key is live or a blq_test_ sandbox key. A sandbox key's generated and converted documents are specimens, not production invoices. It draws no quota. Run it first if a call fails with an auth error, to confirm the key is accepted.

Read the full file on GitHub · 76 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

today Changed b5c69708fdf2
12d ago Changed 032e0776295c
24d ago Changed · +5 lines d566cc976584
2mo ago First seen · 71 lines · 0 tokens per session scan A 66cee6518fe6

Subscribe to this mod's changes

beliq-validate-einvoice is a skill published in the GitHub repository beliq-eu/beliq-mcp (0 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,583 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Legal and compliance

beliq-validate-einvoice next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
beliq-validate-einvoicebeliq-eu/beliq-mcp	Skill	0	today	MIT	A	0	Claude Code, Codex
fto-triageanthropics/claude-for-legal	Skill	9.9k	3d ago	Apache-2.0	A	81	Claude Code
legal-holdanthropics/claude-for-legal	Skill	9.9k	3d ago	Apache-2.0	A	68	Claude Code
specification-writingwanshuiyin/Auto-claude-code-research-in-sleep	Skill	19k	3d ago	MIT	A	49	Claude Code
terms-of-servicegenspark-ai/genoffice	Skill	12k	yesterday	Apache-2.0	A	32	Claude Code, Codex
x-scorecardx-cmd/x-cmd	Skill	4.7k	6d ago	Apache-2.0	A	57	Claude Code, Codex
gesellschaftsrechtliche-satzungen-agbKlotzkette/claude-fuer-deutsches-recht	Skill	1.8k	today	Apache-2.0	A	69	Claude Code