What is ox-mcp?
ox-mcp is a MCP server by Rheopyrin that email (IMAP/SMTP), Sieve mail filters, CalDAV calendars, CardDAV contacts and free/busy scheduling for Open-Xchange and standards-based mail platforms. It is listed under Communication and has 1 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | Rheopyrin |
| Repository | Rheopyrin/ox-mcp |
| Popularity | 1 GitHub stars |
| Category | Communication |
| Security | Low risk (96/100) |
| Rank | #3,185 of 4,418 MCP servers; #194 in Communication |
| License | MIT |
| Last commit | 2026-10-12 |
| Stars this week | +1 |
| Runs | Locally |
| Language | TypeScript |
| Platforms | macOS, Windows, Linux |
Is ox-mcp safe to install?
ox-mcp scores 96/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 5 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install ox-mcp?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/Rheopyrin/ox-mcp
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add ox-mcp -- <command from README> claude mcp add --transport http ox-mcp <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs ox-mcp for you:
Add the "ox-mcp" MCP server from https://github.com/Rheopyrin/ox-mcp to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.