ox-mcp runs on your own machine — the client starts it, so there is no endpoint to ping. 43 installs a week from npm. Last commit 19 Jul 2026.
MCP server for Open-Xchange: email (IMAP/SMTP), Sieve filters, CalDAV calendar, CardDAV contacts
Today is the operative word: we check ox-mcp every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add ox-mcp -- npx -y @rheopyrin/ox-mcp
{
"mcpServers": {
"ox-mcp": {
"args": [
"-y",
"@rheopyrin/ox-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.ox-mcp]
command = "npx"
args = ["-y", "@rheopyrin/ox-mcp"]
{
"mcpServers": {
"ox-mcp": {
"args": [
"-y",
"@rheopyrin/ox-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"ox-mcp": {
"args": [
"-y",
"@rheopyrin/ox-mcp"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
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 (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 (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 (App password for the cardDav section.).
The author declared them in the registry entry; get the values from the project itself.
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Answers built from our own checks of this server.