Scribo Mcp — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited Scribo Mcp (Plugin) and scored it 100/100 (green). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 0 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 0 flagged
Every scanned point with the score it earned and what moved between them.
Aggregate score unchanged between these scans.
The primary manifest — the file an agent reads to learn what this artifact does.
<img width="3840" height="1920" alt="A3 _ MCP server" src="https://github.com/user-attachments/assets/21e2cf1e-69c0-414c-9cee-180a60c17f51" />
Free, AI-native e-invoicing — for any MCP client.
Scribo is a free, conversational e-invoicing tool. Describe an invoice in plain language — "bill Acme GmbH €2,400 for May design work" — and it drafts a structured invoice for you to review, download and send directly.
Just ask your AI agent about Scribo: it ships as an MCP server, a CLI, and a Claude/Codex skill, alongside a public HTTP API and a web app. Free forever — no credit card. You just need a sender email.
Built by Causa Prima — Scribo is built by Causa Prima, a company building agentic AI for the CFO office. It's our first freely available skill — an early glimpse of what we're building.
The Scribo MCP server gives your AI assistant the ability to create invoices for you. It's a hosted Model Context Protocol endpoint — add its URL to your assistant once, then just ask for an invoice and it gathers the details and hands back a finished, compliant invoice in the chat, ready to download and send.
Because it's hosted, there's nothing to install or run locally. It works with any MCP-aware client — Claude Desktop, Claude.ai, Cursor, Cline, ChatGPT App, the OpenAI Codex CLI, and others. Free, no signup — your email is all you need.
https://github.com/user-attachments/assets/3e1fcca8-580b-448f-bb1c-bee5ee016b54
Scribo's MCP server is hosted — there's nothing to install. Point your client at:
https://scribo.causaprima.ai/mcpIn Claude Desktop or Claude.ai: Customize → Connectors → Add custom connector, name it Scribo, paste the URL, and save. Then just ask:
Draft an invoice for 3 days of consulting at €1,200/day to Acme GmbH.
Scribo collects the missing details, verifies your sender email once, and returns a download link.
Using a different client? See the per-client setup below.
The server speaks MCP over Streamable HTTP (JSON-RPC 2.0, MCP spec ≥ 2025-03-26) with no auth. Any MCP-aware client connects with one setting — the URL https://scribo.causaprima.ai/mcp.
Claude Desktop / Claude.ai — Customize → Connectors → Add custom connector → name Scribo, paste the URL. On Team/Enterprise plans an org owner may need to add it once under Organization settings → Connectors.
Cursor — add to ~/.cursor/mcp.json (or workspace .cursor/mcp.json):
{ "mcpServers": { "scribo": { "url": "https://scribo.causaprima.ai/mcp" } } }Cline — add to cline_mcp_settings.json:
{ "mcpServers": { "scribo": { "transport": "streamable-http", "url": "https://scribo.causaprima.ai/mcp" } } }OpenAI Codex CLI — add to ~/.codex/config.toml, then restart Codex:
[mcp_servers.scribo]
url = "https://scribo.causaprima.ai/mcp"Any other MCP client — configure a remote server at the URL above, transport Streamable HTTP, no auth.
Prefer a plain-bash setup with no connector in the loop? The Scribo skill covers Claude Code, Claude.ai, Claude Desktop, and Codex via simple helper scripts.
Verify. Ask your assistant: _"list the jurisdictions Scribo supports."_
You describe the invoice in plain language; your assistant calls Scribo's tools to build it. The server exposes four tools:
| Tool | What it does |
|---|---|
create_invoice | Generates a compliant invoice from the sender, recipient, and line-item details, and returns a durable download link. |
verify_email_code | Confirms ownership of the sender email using the 6-digit code Scribo emails on the first invoice. |
get_invoice | Re-fetches a previously generated invoice and a fresh download link. |
list_supported_jurisdictions | Lists which countries and formats are available. |
A typical flow: you ask for an invoice → your assistant calls create_invoice and collects anything missing → on your first invoice from a new sender email, Scribo asks you to paste a 6-digit code (confirmed via verify_email_code) → your assistant retries and hands back a download link — a PDF with the matching EN 16931 XML embedded. On clients that render widgets (e.g. the ChatGPT App), the invoice appears as a card with a download button.
The server also registers five workflow prompts (generate_invoice, german_b2b_invoice, german_b2g_xrechnung, us_plain_pdf_invoice, redownload_invoice) — clients that surface prompts show them as slash-command-style starters.
Full tool schemas and sample payloads are in schemas/ and examples/, and in the MCP docs.
Things you can say to your assistant once Scribo is connected:
German B2B invoice (ZUGFeRD)
Invoice Beispiel GmbH for 12 hours of web development at €110/hour, 19% VAT. I'm Example GmbH, VAT ID DE123456789.
Returns a ZUGFeRD invoice — a PDF a human can read, with EN 16931 XML embedded for the recipient's accounting system.
German public-sector invoice (XRechnung)
Same client, but it's for the City of Munich — the Leitweg-ID is 04011000-1234512345-06.
A Leitweg-ID tells Scribo this is a B2G invoice, so it produces XRechnung, the format German public authorities require.
US invoice (plain PDF)
Bill Acme Inc. $4,000 for a brand strategy workshop.
A clean PDF invoice — no e-invoice XML, since the US has no e-invoicing mandate.
Re-download a past invoice
Send me the download link for the invoice I made for Beispiel GmbH last week.
Scribo returns a fresh download link for an invoice you've already generated.
Scribo emits invoices conforming to EN 16931, the European e-invoicing standard, with the relevant national CIUS. Every EN 16931 output (ZUGFeRD, XRechnung) is validated against the Invopop-hosted validator at generate-time — output that fails the rule set never reaches the user. US plain PDFs carry no EN 16931 XML and are rendered directly.
Supported formats
| Jurisdiction | Format | Status |
|---|---|---|
| Germany (B2B) | ZUGFeRD COMFORT (PDF/A-3 hybrid + CII XML) | ✅ Live |
| Germany (B2G) | XRechnung (UBL / CII) | ✅ Live |
| United States | Plain PDF (no XML, no e-invoice claim) | ✅ Live |
| France | Factur-X EN 16931 | 🔜 Coming soon |
| Spain | Facturae | 🔜 Coming soon |
| Belgium / NL / LU / AT | Peppol BIS 3.0 UBL | 🔜 Coming soon |
Disclaimer: Scribo generates and validates compliant invoice documents. It is not tax or legal advice — Scribo does not determine your tax obligations, VAT treatment, or filing requirements.
<details> <summary><strong>Is Scribo really free?</strong></summary>
Yes — free forever. No credit card, no subscription, no paywall before your first invoice. You just need a sender email.
</details>
<details> <summary><strong>Do I need an account or signup?</strong></summary>
No signup form. On your first invoice, Scribo verifies the sender email — a 6-digit code (or one-click link) arrives at that address; one verification covers ~30 minutes of invoicing. The same email doubles as your magic-link login for re-downloads later.
</details>
<details> <summary><strong>Which countries and formats are supported?</strong></summary>
Live today: Germany — ZUGFeRD (B2B) and XRechnung (B2G) — and the United States (plain PDF). Coming next: France (Factur-X), Spain (Facturae), and Belgium / NL / LU / AT (Peppol BIS 3.0).
</details>
<details> <summary><strong>What does "EN 16931-compliant" actually mean here?</strong></summary>
Every EN 16931 output (ZUGFeRD, XRechnung) is validated against the EN 16931-1:2017 rule set (via the Invopop-hosted validator) before it's returned. Output that fails validation never reaches you. US plain PDFs carry no EN 16931 XML, so no schematron validation applies.
</details>
<details> <summary><strong>Is the US version compliant?</strong></summary>
Yes. There is no US e-invoicing mandate, so Scribo produces a fully compliant plain PDF.
</details>
<details> <summary><strong>Does Scribo give tax or legal advice?</strong></summary>
No. Scribo generates and validates compliant invoice documents. It does not determine your tax obligations, VAT treatment, or filing requirements.
</details>
<details> <summary><strong>How do AI agents / LLMs use Scribo?</strong></summary>
Scribo is built to be operated by an agent. It ships as an MCP server, a CLI, and a Claude/Codex skill, plus a public HTTP API and a web app — all on the same backend. An agent can discover Scribo, create an invoice, and return the file on a user's behalf.
</details>
<details> <summary><strong>Who builds Scribo?</strong></summary>
Causa Prima — a company building agentic AI for the CFO office. Operated by Causa Prima Germany GmbH, Munich.
</details>
Other Scribo surfaces
scribo-skill · docsscribo-mcp · docsscribo-cli · docsscribo-api-docs · docsscriboProprietary — UNLICENSED. © Causa Prima Germany GmbH. All rights reserved. Distributed for use against the public Scribo API; not open-source. See LICENSE.
~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.