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elster-mcp-server

API key required

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

To add elster-mcp-server to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 14 environment variables, listed below.

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Install

npx -y elster-mcp-server@0.1.0

Environment variables

ELSTER_CONFIG_PATHSet in your MCP config
ELSTER_PFX_PATHSet in your MCP config
ELSTER_PASSWORDSet in your MCP config
ELSTER_TAX_NUMBERSet in your MCP config
ELSTER_STATE_CODESet in your MCP config
ELSTER_NAMESet in your MCP config
ELSTER_FIRST_NAMESet in your MCP config
ELSTER_STREETSet in your MCP config
ELSTER_HOUSE_NUMBERSet in your MCP config
ELSTER_ZIPSet in your MCP config
ELSTER_CITYSet in your MCP config
ELSTER_COUNTRYSet in your MCP config
ELSTER_HEADLESSSet in your MCP config
ELSTER_EST_SKIP_EURSet in your MCP config

Install with your client

Terminal
claude mcp add elster --env ELSTER_CONFIG_PATH=<YOUR_ELSTER_CONFIG_PATH> --env ELSTER_PFX_PATH=<YOUR_ELSTER_PFX_PATH> --env ELSTER_PASSWORD=<YOUR_ELSTER_PASSWORD> --env ELSTER_TAX_NUMBER=<YOUR_ELSTER_TAX_NUMBER> --env ELSTER_STATE_CODE=<YOUR_ELSTER_STATE_CODE> --env ELSTER_NAME=<YOUR_ELSTER_NAME> --env ELSTER_FIRST_NAME=<YOUR_ELSTER_FIRST_NAME> --env ELSTER_STREET=<YOUR_ELSTER_STREET> --env ELSTER_HOUSE_NUMBER=<YOUR_ELSTER_HOUSE_NUMBER> --env ELSTER_ZIP=<YOUR_ELSTER_ZIP> --env ELSTER_CITY=<YOUR_ELSTER_CITY> --env ELSTER_COUNTRY=<YOUR_ELSTER_COUNTRY> --env ELSTER_HEADLESS=<YOUR_ELSTER_HEADLESS> --env ELSTER_EST_SKIP_EUR=<YOUR_ELSTER_EST_SKIP_EUR> -- npx -y elster-mcp-server@0.1.0

Run this in a terminal to add the server to Claude Code.

What this does

elster-mcp-server exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.

Requirements

This server needs the following environment variables to be set before it can run:

ELSTER_CONFIG_PATH
ELSTER_PFX_PATH
ELSTER_PASSWORD
ELSTER_TAX_NUMBER
ELSTER_STATE_CODE
ELSTER_NAME
ELSTER_FIRST_NAME
ELSTER_STREET
ELSTER_HOUSE_NUMBER
ELSTER_ZIP
ELSTER_CITY
ELSTER_COUNTRY
ELSTER_HEADLESS
ELSTER_EST_SKIP_EUR

Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).

Frequently asked questions

How do I install elster-mcp-server?

Run the Claude Code command in the install section to add elster-mcp-server to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.

Which clients work with elster-mcp-server?

This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to elster-mcp-server as well.

Does elster-mcp-server need an API key?

Yes. Before it can run, set these environment variables: ELSTER_CONFIG_PATH, ELSTER_PFX_PATH, ELSTER_PASSWORD, ELSTER_TAX_NUMBER, ELSTER_STATE_CODE, ELSTER_NAME, ELSTER_FIRST_NAME, ELSTER_STREET, ELSTER_HOUSE_NUMBER, ELSTER_ZIP, ELSTER_CITY, ELSTER_COUNTRY, ELSTER_HEADLESS, ELSTER_EST_SKIP_EUR. They go in the env block of your MCP config.

Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.

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Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.

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