Attestwire

warnings

api.attestwire.com

EN 16931: validate invoice data or a UBL/CII file, emit UBL or CII XML. XRechnung, Peppol. Not PDF.

https://api.attestwire.com/mcpWebsiteNo authMCP 2025-11-25v1.0.0last checked 24 Aug 2026spoke MCP on 2 of 2 checks (30 days)initialize in 610 ms

How to authenticate

Checked against the endpoint by our probe on 24 Aug 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	No auth
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Handshake succeeds; 9 tools listable
Credentials demanded in prose	✕validate_invoice, validate_invoice_xml, generate_invoice, explain_rule These tools are listed anonymously and their own descriptions ask for an account or key, but no challenge is issued — so a client has nothing to act on and the refusal arrives as a tool error.

What the probe found

warningTools needing credentials are listed without a challenge

4 of the 9 tools listed anonymously say in their own descriptions that they need an account or a key (validate_invoice, validate_invoice_xml, generate_invoice, explain_rule), but the endpoint issued no WWW-Authenticate challenge. The requirement is stated only in prose, so a call reaches the tool and comes back as a tool error instead of an authorization step.

Tools

check_french_readinesscheck_vies_statusexplain_rulegenerate_invoiceget_upgrade_linkissue_api_keylist_approved_platformsvalidate_invoicevalidate_invoice_xml

Contract history

24 Aug 2026v1.0.0first recorded contract

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