Scribo

Name: Scribo
Author: causa-prima-ai

by causa-prima-aiversion 1.0.0i★ –iRuns in the cloud

Registry nameio.github.causa-prima-ai/scribo

Install

Overview

Description from the maker (original English)

EN 16931-compliant e-invoices: XRechnung, ZUGFeRD, Factur-X, Peppol BIS, Facturae or US PDF. Free.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Docs, sheets & office work

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://scribo.causaprima.ai/mcp

Run this in your terminal

claude mcp add --transport http scribo https://scribo.causaprima.ai/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "scribo": {
      "url": "https://scribo.causaprima.ai/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "scribo": {
      "type": "http",
      "url": "https://scribo.causaprima.ai/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://scribo.causaprima.ai/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account causa-prima-ai, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Docs, sheets & office worki

More stars than 0% of the other 2191 servers in this category
Published to the registry more recently than 12% of the other 2191 servers in this category
Basic checks equal to or better than 100% of the other 2191 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Scribo safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

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Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Scribo MCP Server

Free, AI-native e-invoicing — for any MCP client.

What is Scribo?
What is the Scribo MCP server?
Demo
Getting started
Quickstart
Setup & prerequisites
Usage
How it works
Examples
Compliance
FAQ
Resources
License

What is Scribo?

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.

What is the Scribo MCP server?

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.

Demo

https://github.com/user-attachments/assets/3e1fcca8-580b-448f-bb1c-bee5ee016b54

Getting started

Quickstart

Scribo's MCP server is hosted — there's nothing to install. Point your client at:

https://scribo.causaprima.ai/mcp

In 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.

Setup & prerequisites

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."_

Usage

How it works

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.

Examples

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.

Compliance

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.*

FAQ

Is Scribo really free?

Yes — free forever. No credit card, no subscription, no paywall before your first invoice. You just need a sender email.

Do I need an account or signup?

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.

Which countries and formats are supported?

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).

What does "EN 16931-compliant" actually mean here?

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.

Is the US version compliant?

Yes. There is no US e-invoicing mandate, so Scribo produces a fully compliant plain PDF.

Does Scribo give tax or legal advice?

No. Scribo generates and validates compliant invoice *documents*. It does not determine your tax obligations, VAT treatment, or filing requirements.

How do AI agents / LLMs use Scribo?

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.

Who builds Scribo?

Causa Prima — a company building agentic AI for the CFO office. Operated by Causa Prima Germany GmbH, Munich.

Resources

Web app — scribo.causaprima.ai
Documentation — scribo.causaprima.ai/docs
Compliance & trust — scribo.causaprima.ai/compliance
Causa Prima — causaprima.ai

Other Scribo surfaces

Skill (Claude / Codex) — scribo-skill · docs
MCP server — scribo-mcp · docs
CLI — scribo-cli · docs
HTTP API — scribo-api-docs · docs
Brand hub — scribo

Scribo

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

Scribo MCP Server

Contents

What is Scribo?

What is the Scribo MCP server?

Demo

Getting started

Quickstart

Setup & prerequisites

Usage

How it works

Examples

Compliance

FAQ

Resources

License