Fakturai — German E-Invoice (ZUGFeRD / Factur-X / E-Rechnung)
REMOTE · FAKTURAI.DE · SCANNED SEP 21
KoSIT-verified German e-invoices: generate & validate ZUGFeRD, Factur-X, XRechnung, EN 16931.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security83
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, but the challenge carries no valid RFC 9728 metadata, so a client cannot discover where to get a token. See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability74
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 342 tokens (~114/item across 3 items; 3 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage71
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Fakturai — German E-Invoice (ZUGFeRD / Factur-X… MCP server?
Fakturai — German E-Invoice (ZUGFeRD / Factur-X… is a hosted endpoint at https://fakturai.de/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · fakturai.de
claude mcp add --transport http de-fakturai-erechnung 'https://fakturai.de/mcp'
{
"mcpServers": {
"de-fakturai-erechnung": {
"url": "https://fakturai.de/mcp"
}
}
} {
"servers": {
"de-fakturai-erechnung": {
"type": "http",
"url": "https://fakturai.de/mcp"
}
}
} [mcp_servers.de-fakturai-erechnung] url = "https://fakturai.de/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"de-fakturai-erechnung": {
"type": "remote",
"url": "https://fakturai.de/mcp",
"enabled": true
}
}
} openclaw mcp add de-fakturai-erechnung --url 'https://fakturai.de/mcp' --transport streamable-http
mcp_servers:
de-fakturai-erechnung:
url: "https://fakturai.de/mcp" {
"McpServers": {
"de-fakturai-erechnung": {
"Transport": "http",
"Url": "https://fakturai.de/mcp"
}
}
} assistant mcp add de-fakturai-erechnung -t streamable-http -u 'https://fakturai.de/mcp'
{
"mcpServers": {
"de-fakturai-erechnung": {
"type": "http",
"url": "https://fakturai.de/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 26 Aug 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- 24 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 7 Aug 26 0
- The server no longer declares the “experimental” capability functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 21 Sept 2026 · Probed https://fakturai.de/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=fakturai.de | CN=YR2,O=Let's Encrypt,C=US | 8 Aug 2026 | 6 Nov 2026 | RSA 4096 | SHA256-RSA | 667496eed3b6ff1dbd290dddc482de2421b |
| SANs: fakturai.de | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of fakturai.de. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| de. | present | 26755 | 8 | Verified |
| fakturai.de. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Challenged, unverified
The endpoint asked for a token, but we could not retrieve and validate the RFC 9728 metadata that tells a client how to obtain one.
| Result | Challenged, unverified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
WWW-Authenticate challenge Bearer realm="fakturai-mcp"
Bearer realm="fakturai-mcp"Protected resource metadata
| Retrieved | No |
|---|---|
| Problem | no_resource_metadata |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://fakturai.de/mcp | Verified | 200 | |
| http (plaintext) | http://fakturai.de/mcp | HTTPS enforced | 302 | https://fakturai.de/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
compliance_status ~46
Check the e-rechnung engine health: KoSIT + Mustang daemon status and dependency version pins vs. latest releases. Use before bulk invoice generation to confirm the compliance gate is fully operational.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
generate_einvoice ~122
Generate a KoSIT-verified ZUGFeRD/Factur-X German e-invoice (EN 16931 / E-Rechnung). Returns pdf_b64 (base64 PDF), invoice_number, and the full validation_report. Every invoice returned has passed the official German government KoSIT acceptance gate — the same gate used by federal agencies for B2G submissions. Keywords: ZUGFeRD, Factur-X, E-Rechnung erstellen, Rechnung PDF, German invoice.
| Name | Type | Req | Description |
|---|---|---|---|
| invoice_json | object | yes | – |
| seller_profile | object | yes | – |
Structured output declared, but exposes no named fields.
No examples provided.
validate_einvoice ~110
Validate an existing ZUGFeRD/Factur-X/E-Rechnung invoice. Accepts a base64-encoded PDF or raw CII XML. Runs the full three-validator check: PDF/A conformance, EN 16931 Schematron, and the official German KoSIT acceptance gate. No authentication required. Keywords: E-Rechnung prüfen, ZUGFeRD validieren, Factur-X check, Rechnung compliance.
| Name | Type | Req | Description |
|---|---|---|---|
| content | string | yes | – |
| content_format | string | – | – |
Structured output declared, but exposes no named fields.
No examples provided.
What is the Fakturai — German E-Invoice (ZUGFeRD / Factur-X… MCP server?
Fakturai — German E-Invoice (ZUGFeRD / Factur-X… is an MCP server listed in the public MCP registry as de.fakturai/erechnung. KoSIT-verified German e-invoices: generate & validate ZUGFeRD, Factur-X, XRechnung, EN 16931. This page covers its hosted endpoint (https://fakturai.de/mcp).
Is the Fakturai — German E-Invoice (ZUGFeRD / Factur-X… MCP server safe to use?
Fakturai — German E-Invoice (ZUGFeRD / Factur-X… scores 86 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Fakturai — German E-Invoice (ZUGFeRD / Factur-X… MCP server expose?
Fakturai — German E-Invoice (ZUGFeRD / Factur-X… exposes 3 tools: generate_einvoice, validate_einvoice, compliance_status. Their descriptions and schemas cost roughly 278 tokens of context every time the server is loaded.
Does the Fakturai — German E-Invoice (ZUGFeRD / Factur-X… MCP server require authentication?
Yes. Fakturai — German E-Invoice (ZUGFeRD / Factur-X… asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Fakturai — German E-Invoice (ZUGFeRD / Factur-X… MCP server still maintained?
Fakturai — German E-Invoice (ZUGFeRD / Factur-X… is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.