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DimensionGmail MCP ServerMCP implementation for Gmail servicesNextcloud MCP ServerA production-ready MCP server that connects AI assistants to your Nextcloud instance.
FMRS58 / 100 · C67 / 100 · C
Reliability8 / 2010 / 20
Security and permissions12 / 2012 / 20
Maintenance12 / 2016 / 20
Documentation14 / 2016 / 20
Setup experience12 / 2013 / 20
Best for
  • Developers and enterprises needing Gmail integration with AI applications
  • Users who want to control email workflows via natural language
  • MCP client users wanting to leverage Gmail's full capabilities
  • Users who want to integrate AI assistants (like Claude Desktop or IDEs) with a self-hosted Nextcloud instance.
  • Developers and power users who need deep CRUD operations across multiple Nextcloud apps.
  • Teams that prefer Docker or Kubernetes deployment.
Not for
  • Users without a Gmail or Google Workspace account
  • Those who require real-time synchronization and push notifications without configuring watch
  • Privacy-sensitive users who do not want telemetry data collected (though it can be disabled)
  • Users who don't want to self-host (consider managed service Astrolabe Cloud).
  • Users who need only simple read-only access (this server is more comprehensive).
  • Users who require official support (it is not an official Nextcloud project).
Required permissions
  • Requires access to the user's Gmail account for reading, sending, deleting emails, managing labels, settings, etc.
  • Requires OAuth 2.0 authorization to obtain access and refresh tokens
  • Requires a Nextcloud username and app password (or OAuth).
  • Read/write access to the selected Nextcloud apps (Notes, Calendar, Contacts, Files, etc.).
  • For semantic search, needs external services: Qdrant and Ollama (disabled by default).
Risks and side effects
  • Email data exposure: the server may read and process email content
  • Irreversible actions: sending or deleting emails cannot be undone
  • Telemetry collection: telemetry is enabled by default, collecting anonymous usage data but no personally identifiable information
  • Credential storage with app passwords may pose a security risk if exposed.
  • The server can access a user's full Nextcloud data, so proper access controls are necessary.
  • Experimental semantic search relies on external services, which may introduce security and privacy issues.
  • Tag-based exclusion (EXCLUDED_TAGS) depends on system tags to hide sensitive files, misconfiguration could expose data.
Supported clientsClaude DesktopClaude Desktop
Tools6513