Polar Cloud MCP

Stdio MCP server for Polar Cloud. Generate 3D models, slice with Polar Cloud defaults, and queue prints from Cursor, Claude Desktop, and other MCP clients.

Jobs are queued only. Start the print in Polar Cloud. This does not work in Claude.ai chat.

Install

1. In Polar Cloud, open Account Settings → AI Connect and generate an API key.

2. Pick a client:

Cursor

Click Add to Cursor on that same page. The key is filled in for you.

Or install this repo as a Cursor plugin, then paste the key under Plugins → Configure.

Claude Desktop

Download polar-cloud.mcpb, open it, and paste the key when Claude asks. Claude stores it in the OS keychain.

Other MCP clients

{
  "mcpServers": {
    "polar-cloud": {
      "command": "npx",
      "args": ["-y", "github:Polar3D/polar-cloud-mcp"],
      "env": {
        "POLAR_API_KEY": "pc_live_…"
      }
    }
  }
}

Optional: POLAR_API_URL (defaults to https://polar3d.com).

Tools

Individual: get_account, list_printers, generate_model, upload_model, slice_and_queue, get_job.

Teacher / school admin: list_school_queues, list_school_printers, preview_plate, approve_and_queue, reject_queue_item.

Local development

npm install
POLAR_API_KEY=pc_live_… POLAR_API_URL=http://localhost node index.js

Pack a Claude Desktop extension:

npx @anthropic-ai/mcpb pack