Open Deltat MCP Server

by open-deltatio.github.open-deltat/deltatv0.2.0

MCP server for real-time scheduling: give an agent a calendar it can find, hold and commit slots on without ever double-booking.

9Node.jsstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Active6d ago

Install Open Deltat MCP server

claude mcp add open-deltat -e DELTAT_PASSWORD='<deltat-password>' -- npx -y @open-deltat/mcp

{
  "mcpServers": {
    "open-deltat": {
      "command": "npx",
      "args": [
        "-y",
        "@open-deltat/mcp"
      ],
      "env": {
        "DELTAT_PASSWORD": "<deltat-password>"
      }
    }
  }
}

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

{
  "mcpServers": {
    "open-deltat": {
      "command": "npx",
      "args": [
        "-y",
        "@open-deltat/mcp"
      ],
      "env": {
        "DELTAT_PASSWORD": "<deltat-password>"
      }
    }
  }
}

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

{
  "servers": {
    "open-deltat": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@open-deltat/mcp"
      ],
      "env": {
        "DELTAT_PASSWORD": "<deltat-password>"
      }
    }
  }
}

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

{
  "mcpServers": {
    "open-deltat": {
      "command": "npx",
      "args": [
        "-y",
        "@open-deltat/mcp"
      ],
      "env": {
        "DELTAT_PASSWORD": "<deltat-password>"
      }
    }
  }
}

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

Configuration

Variable	Required	Secret	Description
DELTAT_PASSWORD	yes	yes	Password for the deltat server. Required; there is no default.
DELTAT_HOST	—	—	Hostname of the deltat server.
DELTAT_PORT	—	—	Port deltat listens on.
DELTAT_DATABASE	—	—	Tenant to connect to. Each database name is an isolated tenant.
DELTAT_USER	—	—	Username presented at connect time.
DELTAT_TLS	—	—	on to encrypt the connection and verify deltat's certificate. Unset means off unless DELTAT_TLS_CA is set; without TLS the password is sent in the clear, so use it for any deltat that is not on this machine.
DELTAT_TLS_CA	—	—	Path to a PEM certificate to trust instead of the system's authorities, for a deltat with a self-signed certificate. Implies DELTAT_TLS=on.

Freshness

Active — last maintenance signal 6d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-04 · 6d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-04 · 6d ago · official registry · v0.2.0

FAQ

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

Run: claude mcp add open-deltat -e DELTAT_PASSWORD='<deltat-password>' -- npx -y @open-deltat/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Open Deltat require an API key?

Yes. It expects DELTAT_PASSWORD, of which 1 is a secret.

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

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

›Is Open Deltat in the official MCP registry?

Yes, as io.github.open-deltat/deltat.