DATEV EXTF

Name: DATEV EXTF
Author: seamless-engineering

by seamless-engineeringversion 0.1.0i★ 0iRuns on your computer

Registry nameengineering.seamless/datev-extf

How to install

What it does

Validate and write DATEV-Format (EXTF) files locally, with findings in German and English.

Connects Runs on your computer
Account or key No key needed
Category Docs, sheets & office work

Install

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

Passed 3/3 checks · Runs on your computer · ✓ Commands checked Nov 13, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "datev-extf": {
      "command": "npx",
      "args": [
        "-y",
        "@seamless-engineering/datev-extf-mcp"
      ]
    }
  }
}

Done

Quit Claude and open it again
Done
Try it
Use DATEV EXTF and tell me what you can do for me, then show me one thing
✓ If Claude says it is using DATEV EXTF or shows a DATEV EXTF tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect DATEV EXTF yet

DATEV EXTF runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect DATEV EXTF

Steps for Claude →Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →Install Node.js on your computer first (one time)
Steps for Cursor →Install Node.js on your computer first (one time)
Steps for VS Code →Install Node.js on your computer first (one time)

B · Others in Docs, sheets & office work that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Puter MCP✓ ChatGPT
LMCP✓ ChatGPT
Keeper.sh✓ ChatGPT

Works with Claude Code, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add --scope user datev-extf -- npx -y @seamless-engineering/datev-extf-mcp

Done

Type /mcp in Claude Code
You should see DATEV EXTF listed as connected
Done
Try it
Use DATEV EXTF and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using DATEV EXTF or shows a DATEV EXTF tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use DATEV EXTF and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using DATEV EXTF or shows a DATEV EXTF tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use DATEV EXTF and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using DATEV EXTF or shows a DATEV EXTF tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use DATEV EXTF💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user datev-extf -- npx -y @seamless-engineering/datev-extf-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "datev-extf": {
      "command": "npx",
      "args": [
        "-y",
        "@seamless-engineering/datev-extf-mcp"
      ]
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "datev-extf": {
      "command": "npx",
      "args": [
        "-y",
        "@seamless-engineering/datev-extf-mcp"
      ]
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "datev-extf": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@seamless-engineering/datev-extf-mcp"
      ]
    }
  }
}

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

At a glance

GitHub stars i: 0
Downloads per weeki: 46/wk
Verified domain: ✓ seamless.engineering
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.1.0
Categoryi: Docs, sheets & office work
Published to registryi: Sep 26, 2026
Code last changedi: Sep 26, 2026
Maker: seamless-engineering
Packages: npm: @seamless-engineering/datev-extf-mcp
Repo: seamless-engineering/datev-extf-mcp
Website: seamless.engineering
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 13, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain seamless.engineering (the registry checks domain ownership)
✓ Pass
Still maintained
Code last changed 2 months ago
✓ Pass
Has a licence
Uses MIT
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Docs, sheets & office worki

More stars than 0% of the other 3869 servers in this category
Published to the registry more recently than 38% of the other 3869 servers in this category
Basic checks equal to or better than 100% of the other 3869 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 DATEV EXTF safe?

It passed 3 of 3 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 on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 2 months ago, and the latest version (0.1.0) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Puter MCP, XcodeBuildMCP, XcodeBuildMCP

Others in the same category

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by HeyPuterWidely used★ 44.2KUpdated 5 months ago

Runs in the cloud✓ service owner · puter.com

How to connect

XcodeBuildMCP

XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.

by getsentryWidely used↓ 130.5K/wk shared package★ 6.6KUpdated 4 months ago

Runs on your computer✓ service owner · xcodebuildmcp.com

Install

XcodeBuildMCP

XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.

by cameroncookeWidely used↓ 130.5K/wk shared package★ 6.6KUpdated 14 months ago

Runs on your computer

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.

datev-extf-mcp

MCP server that validates and writes DATEV-Format (EXTF) files: Buchungsstapel (booking batches) and Debitoren/Kreditoren (customer and supplier master data). Ask your AI assistant why DATEV rejected an import, or have it turn a list of bookings into a file DATEV accepts.

*Deutsch:* MCP-Server, der Dateien im DATEV-Format (EXTF) prüft und schreibt. Fragen Sie Ihren KI-Assistenten, warum DATEV einen Import ablehnt: Er bekommt jeden Fehler mit Zeile, Feld und einer verständlichen Erklärung, etwa Punkt statt Komma im Umsatz, fehlende führende Null im Belegdatum oder BU-Schlüssel auf Automatikkonten.

Local only. The server runs on your machine and reads files from disk. Nothing is uploaded, and there's no account or API key.
Built on @seamless-engineering/datev-extf. Its rules come from DATEV's own material: the Formatbeschreibung on developer.datev.de, the DATEV-Format Prüfprogramm and the #REW import messages.
Every file the writer produces passes the validator.

Prefer a browser? The same checks run in the DATEV EXTF validator (English), also without upload.

Install

Needs Node.js 20 or later.

Claude Code

claude mcp add datev-extf -- npx -y @seamless-engineering/datev-extf-mcp

Claude Desktop (claude_desktop_config.json), Cursor (.cursor/mcp.json) and most other clients:

"mcpServers": { "datev-extf": { "command": "npx", "args": ["-y", "@seamless-engineering/datev-extf-mcp"] } } }

Claude Desktop, one click: download datev-extf-mcp.mcpb from the latest release and open it. Build it yourself with ./scripts/bundle.sh.

Relative file paths resolve against the server's working directory, so absolute paths are the safer choice.

Tools

Tool	What it does
`validate_datev_extf`	Checks a file (`path`) or pasted text (`content`). Returns header data, error and warning counts, and each finding with line, field, value and an explanation in German (`lang: "de"`, default) or English (`"en"`). The encoding is only checked for files.
`explain_datev_finding`	Explains a finding code such as `amount-dot` or `bu-automatic`.
`write_buchungsstapel`	Builds a Buchungsstapel (Formatversion 13) from a header and booking rows (amounts in cents), validates it, and writes it as Windows-1252 to `outputPath` or returns the CSV text.
`list_datev_columns`	Lists the 125 Buchungsstapel or 254 Debitoren/Kreditoren columns by position.

Resources: datev-extf://columns/buchungsstapel, datev-extf://columns/debkred, datev-extf://findings/de and datev-extf://findings/en.

Prompt: fix_datev_import validates a file and proposes fixes for the export that produced it.

Example

Why does DATEV reject ~/Downloads/EXTF_Buchungsstapel.csv?

2 errors, 1 warning in 214 data rows (category buchungsstapel, encoding utf-8).

warning [utf8-without-bom]: The file is UTF-8 without a byte order mark. DATEV then reads it as Windows-1252 and umlauts turn into garbage …
error line 4 [amount-dot]: Amount “49.90” uses a dot as the decimal separator. DATEV expects a comma: 12.50 becomes 12,50.
error line 9 [date-leading-zero]: Document date “506” has only three digits: the leading zero is gone. …

Not tax advice

The server checks format, not bookkeeping. It can't tell whether an account or tax key is right for a transaction, and it doesn't pick them when writing. Agree that with your tax advisor.

DATEV and DATEV-Format are trademarks of DATEV eG. This project is not affiliated with or endorsed by DATEV.

Maintenance

Maintained by seamless.engineering for our own production use: we run managed DATEV integrations for shops, payment providers and ERPs, fully EU-hosted. Issues and PRs welcome, no SLA.

Releasing

Bump version in package.json, both versions in server.json and the one in manifest.json, commit, then tag and push: git tag v0.1.1 && git push origin v0.1.1. The release workflow publishes to npm with provenance via trusted publishing, then to the MCP Registry as engineering.seamless/datev-extf.

MIT licence.

DATEV EXTF

What it does

Install

Install Node.js

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Click this button to open Cursor

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Click this button to open VS Code

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Docs, sheets & office worki

Common questions

Others in the same category

Puter MCP

XcodeBuildMCP

XcodeBuildMCP

README from the maker

datev-extf-mcp

Install

Tools

Example

Not tax advice

Maintenance

Releasing