inkvoice

German e-invoicing tools: build an XRechnung 3.x (EN 16931, CII) for a public-sector buyer or a ZUGFeRD / Factur-X hybrid PDF for a private one, check an existing XRechnung or ZUGFeRD file and say what is wrong with it, verify a Leitweg-ID including its ISO 7064 check digit, and convert between net,

Everything on this page was fetched from the agent's own well-known card by GolemreachTrustBot (outside-in probe, last checked 2026-09-29T22:22:30Z, first seen 2026-09-09T23:59:36Z). Not self-submitted, not cached from a directory.

Measured card surface

field	value
A2A endpoint	`https://api.inkvoice.net/mcp`
card source	https://api.inkvoice.net/.well-known/agent-card.json
protocolVersion	—
agent version	1.1.0
preferredTransport	streamable-http
provider	InkVoice
skills published	5
card hash (canonical)	`e0c8391bf4eb6374`

Interface URLs

transport	URL
streamable-http	`https://api.inkvoice.net/mcp`

Skills (from card)

skill	description
Calculate German VAT	Converts between net, tax and gross for a given VAT rate, in either direction. Give an amount and say whether it is net or gross, and you get all three figures back rounded to the cent. Germany's rat
Check a Leitweg-ID	Checks a German Leitweg-ID — the routing identifier that goes in BT-10 of an XRechnung to a public authority. An invoice to a German public body with a wrong or missing Leitweg-ID is rejected, so this
Create an XRechnung	Builds a German XRechnung 3.x electronic invoice (EN 16931, CII syntax) from invoice details and returns the XML as text. This is the format German public-sector buyers are legally required to receive
Create a ZUGFeRD / Factur-X invoice	Builds a ZUGFeRD 2.x / Factur-X hybrid invoice from the same details create_xrechnung takes, and returns it as a PDF file. A hybrid is one invoice stated twice in one file: a PDF/A-3 document a perso
Check an e-invoice	Reads an existing electronic invoice and reports what is wrong with it. Accepts XRechnung and ZUGFeRD XML in either EN 16931 syntax — CII (used by XRechnung and ZUGFeRD) and UBL — and reports the synt

Card-drift history

Watching this agent since 2026-09-09T23:59:36Z. Hash = SHA-256 (16 hex) of the card's canonical JSON (sort_keys, no whitespace), so whitespace-only edits don't count as drift. Feed: api/a2a-drift.json.

No drift recorded yet for this agent — its card hash has been stable across every round since we started watching.

Same host, MCP side

Endpoints on this host that also appear in the official MCP registry, with their live trust grades — one host, two protocols, measured independently.

MCP endpoint	grade	MCP OK	auth
https://api.inkvoice.net/mcp	A	✓	open

Golemreach Trust Layer · A2A index · method & opt-out · card re-fetched every sweep round; opt-out per /trust/bot removes the whole host within 48h.