Elster MCP Server

Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/lukasschwarz-elster-mcp-server

About

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Permissions

What this server can do and what it asks for, from its tool list, install config and code. Checked Nov 2, 2026.

Tools

5 read · 8 write · 0 delete · 1 not yet classified

Secrets

1 (API keys, tokens or passwords)

Install scripts

None found

Runs as

Node.js package

Tools (14)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

• elster_config_show

  Shows the currently loaded ELSTER configuration (with secrets redacted) so you can verify env vars / config.json were picked up.

• elster_est_start

  Starts an ESt 1 A (Einkommensteuererklärung) form-prep session. Opens the form, fills taxpayer basics from config + any extra fields you provide (by ELSTER input id/name hint), runs Prüfung, then waits 30 min for you to review in the portal. NEVER submits.

• elster_eur_start

  Starts an EÜR (Anlage Einnahmen-Überschuss-Rechnung) form-prep session. Fills the form up to Prüfung, then tries to "Speichern und Verlassen" so the draft survives in ELSTER. NEVER submits.

• elster_kennziffern_list

  Returns the list of supported UStVA Kennziffern (codes 81, 86, 66 etc.) with descriptions and whether they are NET (base amount) or TAX (tax amount).

• elster_login_test

  Verifies that the configured certificate + password can log into the ELSTER portal. Returns success and final URL or an error. Use this once before submitting anything.

• elster_session_cancel

  Cancels a running session (closes the browser, marks status as CANCELLED).

• elster_session_list

  Lists all currently tracked sessions (USTVA / EUR / EST / SYNC) with their status.

• elster_session_status

  Returns the current status, progress log, and any screenshot path for a session started via elster_ustva_start / elster_eur_start / elster_est_start.

• elster_sync_history

  Reads "Übermittelte Formulare" (transmission history) from ELSTER. Optionally downloads PDFs.

• elster_sync_inbox

  Reads ELSTER inbox messages ("Posteingang"). Optionally downloads each message as PDF.

• elster_ustva_confirm

  Confirms submission of a UStVA session that is in AWAITING_CONFIRM state. Triggers the final "Absenden" click. Returns the transmission ticket on success.

• elster_ustva_detect_reverse_charge

  Tests whether a voucher would be detected as Reverse-Charge (§13b UStG) based on the configured supplier patterns. Returns matched supplier and region (EU / NON_EU), or null.

• elster_ustva_generate_xml

  Generates an ELSTER UStVA XML snapshot for archiving. Does NOT submit (submission goes via elster_ustva_start). Useful for audit trails.

• elster_ustva_start

  Starts a UStVA submission session. Opens a browser, logs in, fills the form, runs Prüfung, then PAUSES at AWAITING_CONFIRM. You must explicitly call elster_ustva_confirm to send. Returns a sessionId — poll status via elster_session_status.

Signals

Stars

24

Forks

2

Open issues

0

Contributors

2

Last commit

Jul 13, 2026 (3 months ago)

Last release

Jun 27, 2026 (4 months ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name

io.github.lukasschwarz/elster-mcp-server

Version

0.1.0

Auth

API key

Packages

npm elster-mcp-server

License

MIT

Repository

github.com/lukasschwarz/elster-mcp-server

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

Official MCP Registrygithub-graphql