Connect your own AI

Use Claude Desktop, Claude Code or Codex CLI to drive Microsoft Project through ProjecX.

Before you start

• Install ProjecX and open Microsoft Project with a project file loaded.
• Find where ProjecX is installed. The default is C:\Program Files\ProjecX\main.exe. If you installed for your user only, it is %LOCALAPPDATA%\Programs\ProjecX\main.exe.
• You do not need to keep the ProjecX chat window open. Your AI app starts the ProjecX server by itself.

Claude Desktop

Open Settings > Developer > Edit Config and add this to claude_desktop_config.json, then restart Claude Desktop:

{
  "mcpServers": {
    "projecx": {
      "command": "C:\\Program Files\\ProjecX\\main.exe",
      "args": ["--mcp-server"]
    }
  }
}

Claude Code

Run this once in a terminal:

claude mcp add projecx -- "C:\Program Files\ProjecX\main.exe" --mcp-server

Codex CLI

Add this to %USERPROFILE%\.codex\config.toml:

[mcp_servers.projecx]
command = "C:\\Program Files\\ProjecX\\main.exe"
args = ["--mcp-server"]

Other MCP clients

Any client that can run a local stdio server works. Point it at main.exe with the single argument --mcp-server.

Check it works

With Microsoft Project open, ask your AI: "List the tasks in my open project." If it answers with your tasks, you are connected.

Troubleshooting

• No ProjecX tools appear: restart the AI app fully, and check the path to main.exe is correct. In JSON and TOML files every backslash must be doubled.
• "No active project" or COM errors: Microsoft Project must be running with a file open, and ProjecX and Project must run as the same Windows user.
• Large programs: share your scope documents with your AI and ask for a work program. It builds the schedule through the ProjecX tools.

Still stuck? Email [email protected].

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