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    elster-mcp-server

    mcpkey · package
    io.github.lukasschwarz/elster-mcp-server · v0.1.0
    deploy just this

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

    run it

    on your own machines, one way per deploy method
    generated from the record, not tested yet
    # once, as root:
# as_mcp DIR COMMAND...: runs COMMAND as the mcp user in DIR, its home, sandboxed as the
# units are: a package's install scripts can write to DIR only, as the server later can
as_mcp() {
  local dir="$1"; shift
  systemd-run --quiet --wait --pipe --collect --uid=mcp --gid=mcp \
    -p WorkingDirectory="$dir" -p Environment=HOME="$dir" -p ReadWritePaths="$dir" \
    -p NoNewPrivileges=true -p ProtectSystem=strict -p ProtectHome=true -p PrivateTmp=true \
    -- "$@" </dev/null
}
install -d -m 0750 -o mcp -g mcp /var/lib/mcp/elster
# elster: its packages, installed whole before its unit starts (no session installs)
# npx takes a half-installed tree for installed: a rerun starts them afresh
systemctl stop mcp-my-agent-elster.service 2>/dev/null || true
as_mcp /var/lib/mcp/elster rm -rf /var/lib/mcp/elster/.npm/_npx
as_mcp /var/lib/mcp/elster npx --yes [email protected] -- true
as_mcp /var/lib/mcp/elster npx --yes --package=supergateway@4 -- true

#!/usr/bin/env bash
# elster (io.github.lukasschwarz/elster-mcp-server), recipe baremetal (generated).
# Generated by Hub for toolset "my-agent"; started by mcp-my-agent-elster.service.
set -euo pipefail
export HOST=127.0.0.1 PORT=8101
exec npx -y supergateway@4 --stdio 'npx -y [email protected]' --outputTransport streamableHttp --stateful --host 127.0.0.1 --port 8101 --streamableHttpPath /mcp --healthEndpoint /healthz

[Unit]
Description=MCP server elster (toolset my-agent), generated by Hub
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=mcp
Group=mcp
EnvironmentFile=/etc/mcp/my-agent.env
Environment=HOME=/var/lib/mcp/elster
WorkingDirectory=/var/lib/mcp/elster
ExecStart=/opt/mcp/my-agent/bin/elster.sh
Restart=on-failure
RestartSec=5
NoNewPrivileges=true
ProtectSystem=strict
ProtectHome=true
PrivateTmp=true
ReadWritePaths=/var/lib/mcp/elster

[Install]
WantedBy=multi-user.target
    generated from the record, not tested yet
    docker run --rm -p 127.0.0.1:8101:8000 -e ELSTER_CONFIG_PATH -e ELSTER_PFX_PATH -e ELSTER_PASSWORD -e ELSTER_TAX_NUMBER -e ELSTER_STATE_CODE -e ELSTER_NAME -e ELSTER_FIRST_NAME -e ELSTER_STREET -e ELSTER_HOUSE_NUMBER -e ELSTER_ZIP -e ELSTER_CITY -e ELSTER_COUNTRY -e ELSTER_HEADLESS -e ELSTER_EST_SKIP_EUR node:22-alpine sh -c 'npx -y supergateway@4 --stdio '"'"'npx -y [email protected]'"'"' --outputTransport streamableHttp --stateful --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz'
    generated from the record, not tested yet
    # Generated by Hub for toolset "my-agent" (2026-10-18T20:21:43+00:00).
# Each package server runs behind a stdio->HTTP bridge and listens on localhost only.
#   cp .env.example .env    # fill the ${VAR}s
#   docker compose up -d && bash smoke.sh
# Remote servers are not here: clients reach them directly (see clients/).
name: mcp-my-agent
services:
  elster:
    image: node:22-alpine
    command:
    - sh
    - -c
    - npx -y supergateway@4 --stdio 'npx -y [email protected]' --outputTransport streamableHttp
      --stateful --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz
    ports:
    - 127.0.0.1:8101:8000
    volumes:
    - npm-cache:/root/.npm
    healthcheck:
      test:
      - CMD-SHELL
      - wget -qO- http://127.0.0.1:8000/healthz || exit 1
      interval: 30s
      timeout: 5s
      retries: 5
      start_period: 2m
    restart: unless-stopped
    environment:
      ELSTER_CONFIG_PATH: ${ELSTER_CONFIG_PATH}
      ELSTER_PFX_PATH: ${ELSTER_PFX_PATH}
      ELSTER_PASSWORD: ${ELSTER_PASSWORD}
      ELSTER_TAX_NUMBER: ${ELSTER_TAX_NUMBER}
      ELSTER_STATE_CODE: ${ELSTER_STATE_CODE}
      ELSTER_NAME: ${ELSTER_NAME}
      ELSTER_FIRST_NAME: ${ELSTER_FIRST_NAME}
      ELSTER_STREET: ${ELSTER_STREET}
      ELSTER_HOUSE_NUMBER: ${ELSTER_HOUSE_NUMBER}
      ELSTER_ZIP: ${ELSTER_ZIP}
      ELSTER_CITY: ${ELSTER_CITY}
      ELSTER_COUNTRY: ${ELSTER_COUNTRY}
      ELSTER_HEADLESS: ${ELSTER_HEADLESS}
      ELSTER_EST_SKIP_EUR: ${ELSTER_EST_SKIP_EUR}
volumes:
  npm-cache: {}
  uv-cache: {}
    generated from the record, not tested yet
    # Generated by Hub for toolset "my-agent" (2026-10-18T20:21:43+00:00).
#   kubectl create namespace mcp
#   kubectl -n mcp create secret generic mcp-credentials --from-env-file=.env
#   kubectl apply -f kubernetes.yaml
# Services are cluster-internal: <name>.mcp.svc.cluster.local:8000/mcp. Put an ingress
# with auth in front before exposing any of them.
apiVersion: v1
kind: Namespace
metadata:
  name: mcp
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: elster
  namespace: mcp
  labels: &id001
    app: elster
spec:
  replicas: 1
  selector:
    matchLabels: *id001
  template:
    metadata:
      labels: *id001
    spec:
      containers:
      - name: elster
        image: node:22-alpine
        ports:
        - containerPort: 8000
          name: http
        env:
        - name: ELSTER_CONFIG_PATH
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_CONFIG_PATH
        - name: ELSTER_PFX_PATH
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_PFX_PATH
        - name: ELSTER_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_PASSWORD
        - name: ELSTER_TAX_NUMBER
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_TAX_NUMBER
        - name: ELSTER_STATE_CODE
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_STATE_CODE
        - name: ELSTER_NAME
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_NAME
        - name: ELSTER_FIRST_NAME
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_FIRST_NAME
        - name: ELSTER_STREET
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_STREET
        - name: ELSTER_HOUSE_NUMBER
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_HOUSE_NUMBER
        - name: ELSTER_ZIP
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_ZIP
        - name: ELSTER_CITY
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_CITY
        - name: ELSTER_COUNTRY
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_COUNTRY
        - name: ELSTER_HEADLESS
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_HEADLESS
        - name: ELSTER_EST_SKIP_EUR
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: ELSTER_EST_SKIP_EUR
        args:
        - sh
        - -c
        - npx -y supergateway@4 --stdio 'npx -y [email protected]' --outputTransport streamableHttp
          --stateful --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz
        readinessProbe:
          httpGet:
            path: /healthz
            port: http
          initialDelaySeconds: 10
---
apiVersion: v1
kind: Service
metadata:
  name: elster
  namespace: mcp
spec:
  selector:
    app: elster
  ports:
  - port: 8000
    targetPort: http
    name: http
    generated from the record, not tested yet
    # Generated by Hub for toolset "my-agent" (2026-10-18T20:21:43+00:00).
# Credentials come from the Secret 'mcp-credentials' (kubectl create secret generic ... --from-env-file=.env).
# Each server under `servers` is one Deployment + Service; the keys after it configure
# upstream charts a worker verified.
servers:
  elster:
    enabled: true
    replicas: 1
    port: 8000
    path: /mcp
    container:
      name: elster
      image: node:22-alpine
      ports:
      - containerPort: 8000
        name: http
      env:
      - name: ELSTER_CONFIG_PATH
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_CONFIG_PATH
      - name: ELSTER_PFX_PATH
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_PFX_PATH
      - name: ELSTER_PASSWORD
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_PASSWORD
      - name: ELSTER_TAX_NUMBER
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_TAX_NUMBER
      - name: ELSTER_STATE_CODE
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_STATE_CODE
      - name: ELSTER_NAME
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_NAME
      - name: ELSTER_FIRST_NAME
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_FIRST_NAME
      - name: ELSTER_STREET
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_STREET
      - name: ELSTER_HOUSE_NUMBER
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_HOUSE_NUMBER
      - name: ELSTER_ZIP
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_ZIP
      - name: ELSTER_CITY
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_CITY
      - name: ELSTER_COUNTRY
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_COUNTRY
      - name: ELSTER_HEADLESS
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_HEADLESS
      - name: ELSTER_EST_SKIP_EUR
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: ELSTER_EST_SKIP_EUR
      args:
      - sh
      - -c
      - npx -y supergateway@4 --stdio 'npx -y [email protected]' --outputTransport streamableHttp
        --stateful --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz
      readinessProbe:
        httpGet:
          path: /healthz
          port: http
        initialDelaySeconds: 10

# helm install my-agent helm/my-agent -n mcp

    in the cloud

    one click: the provider's deploy form opens filled in, in your own account
    koyeb
    deploy to koyeb

    The form opens with CHANGE_ME for each value you supply: 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. Fill them in before you deploy.

    Clients connect to the service's https://…koyeb.app address plus /mcp.

    azure
    deploy to azuretemplate

    A Container Apps environment with one app per server, each with HTTPS ingress and one replica. The portal asks for each value you supply as a secure parameter; the deployment's outputs list the endpoints.

    connect to it

    copy what your client needs
    npx -y [email protected]
# env: 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
    {
  "mcpServers": {
    "elster": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "${ELSTER_CONFIG_PATH}",
        "ELSTER_PFX_PATH": "${ELSTER_PFX_PATH}",
        "ELSTER_PASSWORD": "${ELSTER_PASSWORD}",
        "ELSTER_TAX_NUMBER": "${ELSTER_TAX_NUMBER}",
        "ELSTER_STATE_CODE": "${ELSTER_STATE_CODE}",
        "ELSTER_NAME": "${ELSTER_NAME}",
        "ELSTER_FIRST_NAME": "${ELSTER_FIRST_NAME}",
        "ELSTER_STREET": "${ELSTER_STREET}",
        "ELSTER_HOUSE_NUMBER": "${ELSTER_HOUSE_NUMBER}",
        "ELSTER_ZIP": "${ELSTER_ZIP}",
        "ELSTER_CITY": "${ELSTER_CITY}",
        "ELSTER_COUNTRY": "${ELSTER_COUNTRY}",
        "ELSTER_HEADLESS": "${ELSTER_HEADLESS}",
        "ELSTER_EST_SKIP_EUR": "${ELSTER_EST_SKIP_EUR}"
      }
    }
  }
}
    #!/usr/bin/env bash
# Registers every server with Claude Code (run once; `claude mcp list` to check).
set -euo pipefail
set -a; [ -f .env ] && source .env; set +a
claude mcp add elster -e "ELSTER_CONFIG_PATH=${ELSTER_CONFIG_PATH}" -e "ELSTER_PFX_PATH=${ELSTER_PFX_PATH}" -e "ELSTER_PASSWORD=${ELSTER_PASSWORD}" -e "ELSTER_TAX_NUMBER=${ELSTER_TAX_NUMBER}" -e "ELSTER_STATE_CODE=${ELSTER_STATE_CODE}" -e "ELSTER_NAME=${ELSTER_NAME}" -e "ELSTER_FIRST_NAME=${ELSTER_FIRST_NAME}" -e "ELSTER_STREET=${ELSTER_STREET}" -e "ELSTER_HOUSE_NUMBER=${ELSTER_HOUSE_NUMBER}" -e "ELSTER_ZIP=${ELSTER_ZIP}" -e "ELSTER_CITY=${ELSTER_CITY}" -e "ELSTER_COUNTRY=${ELSTER_COUNTRY}" -e "ELSTER_HEADLESS=${ELSTER_HEADLESS}" -e "ELSTER_EST_SKIP_EUR=${ELSTER_EST_SKIP_EUR}" -- npx -y [email protected]

    {
  "mcpServers": {
    "elster": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "${ELSTER_CONFIG_PATH}",
        "ELSTER_PFX_PATH": "${ELSTER_PFX_PATH}",
        "ELSTER_PASSWORD": "${ELSTER_PASSWORD}",
        "ELSTER_TAX_NUMBER": "${ELSTER_TAX_NUMBER}",
        "ELSTER_STATE_CODE": "${ELSTER_STATE_CODE}",
        "ELSTER_NAME": "${ELSTER_NAME}",
        "ELSTER_FIRST_NAME": "${ELSTER_FIRST_NAME}",
        "ELSTER_STREET": "${ELSTER_STREET}",
        "ELSTER_HOUSE_NUMBER": "${ELSTER_HOUSE_NUMBER}",
        "ELSTER_ZIP": "${ELSTER_ZIP}",
        "ELSTER_CITY": "${ELSTER_CITY}",
        "ELSTER_COUNTRY": "${ELSTER_COUNTRY}",
        "ELSTER_HEADLESS": "${ELSTER_HEADLESS}",
        "ELSTER_EST_SKIP_EUR": "${ELSTER_EST_SKIP_EUR}"
      }
    }
  }
}
    {
  "servers": {
    "elster": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "ELSTER_CONFIG_PATH": "${ELSTER_CONFIG_PATH}",
        "ELSTER_PFX_PATH": "${ELSTER_PFX_PATH}",
        "ELSTER_PASSWORD": "${ELSTER_PASSWORD}",
        "ELSTER_TAX_NUMBER": "${ELSTER_TAX_NUMBER}",
        "ELSTER_STATE_CODE": "${ELSTER_STATE_CODE}",
        "ELSTER_NAME": "${ELSTER_NAME}",
        "ELSTER_FIRST_NAME": "${ELSTER_FIRST_NAME}",
        "ELSTER_STREET": "${ELSTER_STREET}",
        "ELSTER_HOUSE_NUMBER": "${ELSTER_HOUSE_NUMBER}",
        "ELSTER_ZIP": "${ELSTER_ZIP}",
        "ELSTER_CITY": "${ELSTER_CITY}",
        "ELSTER_COUNTRY": "${ELSTER_COUNTRY}",
        "ELSTER_HEADLESS": "${ELSTER_HEADLESS}",
        "ELSTER_EST_SKIP_EUR": "${ELSTER_EST_SKIP_EUR}"
      }
    }
  }
}
    name: my-agent
target: local
servers:
- hub: io.github.lukasschwarz/elster-mcp-server
    • not probed yet: tools unpinned, ingest lists them

    tools

    Not probed yetThe tools appear once the hub or its worker has listed this entry. Running it still works: your client lists them on first start.