elster-mcp-server

A community-built Model Context Protocol server that allows AI agents to drive the German tax portal ELSTER via Puppeteer. It enables users to submit UStVA forms, prepare EUER/ESt tax returns, and sync inbox history using credentials provided by the user.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by lukasschwarz

Vendor documentation

What you can do with it

Submit UStVA tax forms
Prepare EUER/ESt tax returns
Sync inbox and history

Source and maintenance

Community listingRegistry 0.1.0

mcp-registry: io.github.lukasschwarz/elster-mcp-server@0.1.0 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

elster-mcp-server 0.1.0

npm

elster-mcp-server package definition

{
  "version": "0.1.0",
  "transport": "stdio",
  "identifier": "elster-mcp-server",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "ELSTER_CONFIG_PATH",
      "format": "string",
      "description": "Path to a config.json that holds all settings below. Recommended."
    },
    {
      "name": "ELSTER_PFX_PATH",
      "format": "string",
      "description": "Absolute path to your ELSTER certificate (.pfx)."
    },
    {
      "name": "ELSTER_PASSWORD",
      "format": "string",
      "description": "Password for the .pfx certificate."
    },
    {
      "name": "ELSTER_TAX_NUMBER",
      "format": "string",
      "description": "Your Steuernummer in the format issued by your Finanzamt."
    },
    {
      "name": "ELSTER_STATE_CODE",
      "format": "string",
      "description": "Two-digit ELSTER federal-state code of your Finanzamt."
    },
    {
      "name": "ELSTER_NAME",
      "format": "string",
      "description": "Last name / company name."
    },
    {
      "name": "ELSTER_FIRST_NAME",
      "format": "string",
      "description": "First name."
    },
    {
      "name": "ELSTER_STREET",
      "format": "string",
      "description": "Street."
    },
    {
      "name": "ELSTER_HOUSE_NUMBER",
      "format": "string",
      "description": "House number."
    },
    {
      "name": "ELSTER_ZIP",
      "format": "string",
      "description": "ZIP code."
    },
    {
      "name": "ELSTER_CITY",
      "format": "string",
      "description": "City."
    },
    {
      "name": "ELSTER_COUNTRY",
      "format": "string",
      "description": "ISO country code, default DE."
    },
    {
      "name": "ELSTER_HEADLESS",
      "format": "string",
      "description": "Run Chromium headless (true/false). Default true."
    },
    {
      "name": "ELSTER_EST_SKIP_EUR",
      "format": "string",
      "description": "If 1, skip the EUER pre-hook in ESt sessions."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

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This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "elster-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "elster-mcp-server@0.1.0"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "<YOUR_ELSTER_CONFIG_PATH>",
        "ELSTER_PFX_PATH": "<YOUR_ELSTER_PFX_PATH>",
        "ELSTER_PASSWORD": "<YOUR_ELSTER_PASSWORD>",
        "ELSTER_TAX_NUMBER": "<YOUR_ELSTER_TAX_NUMBER>",
        "ELSTER_STATE_CODE": "<YOUR_ELSTER_STATE_CODE>",
        "ELSTER_NAME": "<YOUR_ELSTER_NAME>",
        "ELSTER_FIRST_NAME": "<YOUR_ELSTER_FIRST_NAME>",
        "ELSTER_STREET": "<YOUR_ELSTER_STREET>",
        "ELSTER_HOUSE_NUMBER": "<YOUR_ELSTER_HOUSE_NUMBER>",
        "ELSTER_ZIP": "<YOUR_ELSTER_ZIP>",
        "ELSTER_CITY": "<YOUR_ELSTER_CITY>",
        "ELSTER_COUNTRY": "<YOUR_ELSTER_COUNTRY>",
        "ELSTER_HEADLESS": "<YOUR_ELSTER_HEADLESS>",
        "ELSTER_EST_SKIP_EUR": "<YOUR_ELSTER_EST_SKIP_EUR>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "elster-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "elster-mcp-server@0.1.0"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "<YOUR_ELSTER_CONFIG_PATH>",
        "ELSTER_PFX_PATH": "<YOUR_ELSTER_PFX_PATH>",
        "ELSTER_PASSWORD": "<YOUR_ELSTER_PASSWORD>",
        "ELSTER_TAX_NUMBER": "<YOUR_ELSTER_TAX_NUMBER>",
        "ELSTER_STATE_CODE": "<YOUR_ELSTER_STATE_CODE>",
        "ELSTER_NAME": "<YOUR_ELSTER_NAME>",
        "ELSTER_FIRST_NAME": "<YOUR_ELSTER_FIRST_NAME>",
        "ELSTER_STREET": "<YOUR_ELSTER_STREET>",
        "ELSTER_HOUSE_NUMBER": "<YOUR_ELSTER_HOUSE_NUMBER>",
        "ELSTER_ZIP": "<YOUR_ELSTER_ZIP>",
        "ELSTER_CITY": "<YOUR_ELSTER_CITY>",
        "ELSTER_COUNTRY": "<YOUR_ELSTER_COUNTRY>",
        "ELSTER_HEADLESS": "<YOUR_ELSTER_HEADLESS>",
        "ELSTER_EST_SKIP_EUR": "<YOUR_ELSTER_EST_SKIP_EUR>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "elster-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "elster-mcp-server@0.1.0"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "<YOUR_ELSTER_CONFIG_PATH>",
        "ELSTER_PFX_PATH": "<YOUR_ELSTER_PFX_PATH>",
        "ELSTER_PASSWORD": "<YOUR_ELSTER_PASSWORD>",
        "ELSTER_TAX_NUMBER": "<YOUR_ELSTER_TAX_NUMBER>",
        "ELSTER_STATE_CODE": "<YOUR_ELSTER_STATE_CODE>",
        "ELSTER_NAME": "<YOUR_ELSTER_NAME>",
        "ELSTER_FIRST_NAME": "<YOUR_ELSTER_FIRST_NAME>",
        "ELSTER_STREET": "<YOUR_ELSTER_STREET>",
        "ELSTER_HOUSE_NUMBER": "<YOUR_ELSTER_HOUSE_NUMBER>",
        "ELSTER_ZIP": "<YOUR_ELSTER_ZIP>",
        "ELSTER_CITY": "<YOUR_ELSTER_CITY>",
        "ELSTER_COUNTRY": "<YOUR_ELSTER_COUNTRY>",
        "ELSTER_HEADLESS": "<YOUR_ELSTER_HEADLESS>",
        "ELSTER_EST_SKIP_EUR": "<YOUR_ELSTER_EST_SKIP_EUR>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "elster-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "elster-mcp-server@0.1.0"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "<YOUR_ELSTER_CONFIG_PATH>",
        "ELSTER_PFX_PATH": "<YOUR_ELSTER_PFX_PATH>",
        "ELSTER_PASSWORD": "<YOUR_ELSTER_PASSWORD>",
        "ELSTER_TAX_NUMBER": "<YOUR_ELSTER_TAX_NUMBER>",
        "ELSTER_STATE_CODE": "<YOUR_ELSTER_STATE_CODE>",
        "ELSTER_NAME": "<YOUR_ELSTER_NAME>",
        "ELSTER_FIRST_NAME": "<YOUR_ELSTER_FIRST_NAME>",
        "ELSTER_STREET": "<YOUR_ELSTER_STREET>",
        "ELSTER_HOUSE_NUMBER": "<YOUR_ELSTER_HOUSE_NUMBER>",
        "ELSTER_ZIP": "<YOUR_ELSTER_ZIP>",
        "ELSTER_CITY": "<YOUR_ELSTER_CITY>",
        "ELSTER_COUNTRY": "<YOUR_ELSTER_COUNTRY>",
        "ELSTER_HEADLESS": "<YOUR_ELSTER_HEADLESS>",
        "ELSTER_EST_SKIP_EUR": "<YOUR_ELSTER_EST_SKIP_EUR>"
      }
    }
  }
}

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