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Elster MCP Server

by lukasschwarz Your server? Claim it
local only

Elster MCP Server runs on your own machine — the client starts it, so there is no endpoint to ping. 22 installs a week from npm. Last commit 13 Jul 2026.

Drive the German tax portal ELSTER via Puppeteer: submit UStVA, prepare EUER/ESt, sync inbox.

Installs per day peak 14 · avg 6 · -37% w/w
a month agotoday
22
Installs / week
npm · elster-mcp-server
13
Stars
0 open issues
13 Jul 2026
Last commit
0 releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 8 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Builds a file path from a variable src/elster/sync.ts:272
      const fullPath = path.join(downloadDir, fileName);

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add elster-mcp-server -- npx -y elster-mcp-server
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "elster-mcp-server": {
      "args": [
        "-y",
        "elster-mcp-server"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.elster-mcp-server]
command = "npx"
args = ["-y", "elster-mcp-server"]
.cursor/mcp.json
{
  "mcpServers": {
    "elster-mcp-server": {
      "args": [
        "-y",
        "elster-mcp-server"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "elster-mcp-server": {
      "args": [
        "-y",
        "elster-mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: ELSTER_CONFIG_PATH (Path to a config.json that holds all settings below. Recommended.), ELSTER_PFX_PATH (Absolute path to your ELSTER certificate (.pfx).), ELSTER_PASSWORD (Password for the .pfx certificate.), ELSTER_TAX_NUMBER (Your Steuernummer in the format issued by your Finanzamt.), ELSTER_STATE_CODE (Two-digit ELSTER federal-state code of your Finanzamt.), ELSTER_NAME (Last name / company name.), ELSTER_FIRST_NAME (First name.), ELSTER_STREET (Street.), ELSTER_HOUSE_NUMBER (House number.), ELSTER_ZIP (ZIP code.), ELSTER_CITY (City.), ELSTER_COUNTRY (ISO country code, default DE.), ELSTER_HEADLESS (Run Chromium headless (true/false). Default true.), ELSTER_EST_SKIP_EUR (If 1, skip the EUER pre-hook in ESt sessions.). The author declared them in the registry entry; get the values from the project itself.

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Elster MCP Server — questions

Answers built from our own checks of this server.

Why is there no uptime for Elster MCP Server?
Elster MCP Server runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package elster-mcp-server was installed 22 times last week.
How do I connect Elster MCP Server?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls elster-mcp-server straight from npm; nothing to host, nothing to sign up for.
How many people use Elster MCP Server?
The npm package elster-mcp-server was installed 22 times in the last week. Week over week that is -37%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Elster MCP Server open source?
Yes — it is published under the MIT licence, written in TypeScript and 13 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.