Catches retired profile identifiers, code-list values outside EN 16931 and malformed dates in your e-invoice XML, in the editor, before an access point rejects the file.
Sweep every XML file in the repository in one pass, write the findings report you hand to the integration owner or the auditor, and fail the build in CI when a new invoice template breaks a rule.
$29 once · one licence key per person or team seat · Peppol access points bill per document - published pay-per-use rates run EUR 0.18 to EUR 0.25 per invoice - and every rejected document is one you send twice.