ox MCP Server

by rheopyrinio.github.Rheopyrin/ox-mcpv0.1.2

Email (IMAP/SMTP), Sieve mail filters, CalDAV calendars, CardDAV contacts and free/busy scheduling for Open-Xchange and standards-based mail platforms.

0Node.jsstdioofficial registry

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security

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cold start

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freshness

Maintained3mo ago

Install ox MCP server

claude mcp add ox -e OX_MCP_MAIL_APP_PASSWORD='<ox-mcp-mail-app-password>' -e OX_MCP_CALDAV_APP_PASSWORD='<ox-mcp-caldav-app-password>' -e OX_MCP_CARDDAV_APP_PASSWORD='<ox-mcp-carddav-app-password>' -- npx -y @rheopyrin/ox-mcp

{
  "mcpServers": {
    "ox": {
      "command": "npx",
      "args": [
        "-y",
        "@rheopyrin/ox-mcp"
      ],
      "env": {
        "OX_MCP_MAIL_APP_PASSWORD": "<ox-mcp-mail-app-password>",
        "OX_MCP_CALDAV_APP_PASSWORD": "<ox-mcp-caldav-app-password>",
        "OX_MCP_CARDDAV_APP_PASSWORD": "<ox-mcp-carddav-app-password>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "ox": {
      "command": "npx",
      "args": [
        "-y",
        "@rheopyrin/ox-mcp"
      ],
      "env": {
        "OX_MCP_MAIL_APP_PASSWORD": "<ox-mcp-mail-app-password>",
        "OX_MCP_CALDAV_APP_PASSWORD": "<ox-mcp-caldav-app-password>",
        "OX_MCP_CARDDAV_APP_PASSWORD": "<ox-mcp-carddav-app-password>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "ox": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@rheopyrin/ox-mcp"
      ],
      "env": {
        "OX_MCP_MAIL_APP_PASSWORD": "<ox-mcp-mail-app-password>",
        "OX_MCP_CALDAV_APP_PASSWORD": "<ox-mcp-caldav-app-password>",
        "OX_MCP_CARDDAV_APP_PASSWORD": "<ox-mcp-carddav-app-password>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "ox": {
      "command": "npx",
      "args": [
        "-y",
        "@rheopyrin/ox-mcp"
      ],
      "env": {
        "OX_MCP_MAIL_APP_PASSWORD": "<ox-mcp-mail-app-password>",
        "OX_MCP_CALDAV_APP_PASSWORD": "<ox-mcp-caldav-app-password>",
        "OX_MCP_CARDDAV_APP_PASSWORD": "<ox-mcp-carddav-app-password>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
OX_MCP_MAIL_SERVER	—	—	IMAP/SMTP/ManageSieve host for the mail section (email_* tools).
OX_MCP_MAIL_USER	—	—	Login user (mailbox address) for the mail section.
OX_MCP_MAIL_APP_PASSWORD	—	yes	App password for the mail section (basic auth).
OX_MCP_CALDAV_SERVER	—	—	CalDAV host for the calDav section (calendar_* tools).
OX_MCP_CALDAV_USER	—	—	Login user for the calDav section.
OX_MCP_CALDAV_APP_PASSWORD	—	yes	App password for the calDav section (servers may scope passwords per protocol).
OX_MCP_CARDDAV_SERVER	—	—	CardDAV host for the cardDav section (contact_* tools).
OX_MCP_CARDDAV_USER	—	—	Login user for the cardDav section.
OX_MCP_CARDDAV_APP_PASSWORD	—	yes	App password for the cardDav section.

Freshness

Maintained — last maintenance signal 3mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-07-19 · 3mo ago · GitHub
Latest release
2026-07-19 · 3mo ago · GitHub · v0.1.2
Package published
no data · npm/PyPI
Registry entry updated
2026-07-19 · 3mo ago · official registry · v0.1.2

FAQ

›How do I install the ox MCP server in Claude Code?

Run: claude mcp add ox -e OX_MCP_MAIL_APP_PASSWORD='<ox-mcp-mail-app-password>' -e OX_MCP_CALDAV_APP_PASSWORD='<ox-mcp-caldav-app-password>' -e OX_MCP_CARDDAV_APP_PASSWORD='<ox-mcp-carddav-app-password>' -- npx -y @rheopyrin/ox-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does ox require an API key?

Yes. It expects OX_MCP_MAIL_APP_PASSWORD, OX_MCP_CALDAV_APP_PASSWORD, OX_MCP_CARDDAV_APP_PASSWORD, of which 3 are secrets.

›Can I use ox as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is ox in the official MCP registry?

Yes, as io.github.Rheopyrin/ox-mcp.