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.
We read the source, 8 h ago · rules 3dff92dd89df
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.
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.
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.
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.
claude mcp add elster-mcp-server -- npx -y elster-mcp-server
{
"mcpServers": {
"elster-mcp-server": {
"args": [
"-y",
"elster-mcp-server"
],
"command": "npx"
}
}
}
[mcp_servers.elster-mcp-server]
command = "npx"
args = ["-y", "elster-mcp-server"]
{
"mcpServers": {
"elster-mcp-server": {
"args": [
"-y",
"elster-mcp-server"
],
"command": "npx"
}
}
}
{
"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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Answers built from our own checks of this server.