Hermes Google MCP Server

Hermes Google MCP Server

Lightweight MCP server for Google Workspace (Calendar, Gmail, Drive) designed for Hermes Agent in Docker, enabling tools to list events, messages, and files via CLI.

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Hermes Google MCP Server

Schlanker MCP-Server für Google Workspace (Calendar · Gmail · Drive) — entwickelt für den Hermes Agent im Docker-Setup.

Warum dieses Projekt?

Die in der Hermes-Dokumentation beschriebenen drei Standard-Wege zur Google-Anbindung scheiterten im Docker-Container-Setup:

Weg Problem
gws CLI MCP gws v0.22.5 hat keinen mcp-Subbefehl
google_workspace_mcp asyncio TaskGroup-Fehler beim Gateway-Connect
Google Remote MCP OAuth-Flow im Container nicht möglich (kein Browser)

Dieser Server löst alle drei Probleme: Reines Python (stdlib-only), HTTP-Transport (umgeht den asyncio-Bug), nutzt die funktionierende gws-CLI-Authentifizierung.

Architektur

Hermes Gateway (Docker)         Host (masoud)
─────────────────────────       ─────────────────────
config.yaml:                       
  gws-mcp:                    POST /mcp (JSON-RPC)
    url: http://172.17.0.1 ───► http_server.py (Port 8777)
    :8777/mcp                      │
                                   │ subprocess stdin/stdout
                                   ▼
                               server.py (MCP Engine)
                                   │
                                   │ subprocess CLI
                                   ▼
                               gws CLI (OAuth 2.0)
                                   │
                                   ▼
                          Google Workspace APIs
                          (Calendar v3 · Gmail v1 · Drive v3)

Tools

Tool Dienst Beschreibung
gws_calendar_list_events Calendar Events auflisten (Zeitraum, max. Anzahl)
gws_gmail_list_messages Gmail E-Mail-IDs auflisten (mit Suchfilter)
gws_gmail_get_message Gmail E-Mail-Inhalt + Body (includeBody=true)
gws_drive_list_files Drive Dateien/Ordner auflisten (mit Suchfilter)
gws_drive_get_file Drive Datei-Metadaten abrufen
gws_drive_download_file Drive Datei herunterladen → workspace/

Voraussetzungen

  • gws CLI (npm install -g @googleworkspace/cli)
  • OAuth 2.0 Desktop-Client (Google Cloud Console → Credentials)
  • Authentifizierung via gws auth login

Schnellstart

# 1. Abhängigkeiten installieren
npm install -g @googleworkspace/cli

# 2. Authentifizieren (einmalig)
GOOGLE_WORKSPACE_CLI_KEYRING_BACKEND=file gws auth login

# 3. Server starten
git clone https://github.com/MAghadavoodi/HermesGoogleMCP.git
cd HermesGoogleMCP
python3 src/http_server.py &

# 4. Hermes config.yaml
mcp_servers:
  gws-mcp:
    url: http://172.17.0.1:8777/mcp
    enabled: true

platform_toolsets:
  cli:
  - gws-mcp
  matrix:
  - gws-mcp

# 5. Reload
hermes mcp reload

Tests

python3 tests/test_calendar.py   # 2/2 ✅
python3 tests/test_gmail.py      # 2/2 ✅
python3 tests/test_drive.py      # 3/3 ✅

Projektstruktur

HermesGoogleMCP/
├── src/
│   ├── server.py          # MCP JSON-RPC Engine (6 Tools)
│   └── http_server.py     # HTTP-Wrapper (Port 8777)
├── tests/
│   ├── test_calendar.py
│   ├── test_gmail.py
│   └── test_drive.py
├── docs/
│   └── ARCHITECTURE.md    # Detaillierte Architektur-Doku
├── Dockerfile             # Docker-Image (experimentell)
├── docker-compose.yml     # Docker-Compose (experimentell)
├── requirements.txt       # stdlib-only, keine pip-Abhängigkeiten
└── .gitignore

Lizenz

MIT — siehe LICENSE

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