@loopgantt/mcp-server

MCP (Model Context Protocol) server for LoopGantt. Turn a plain-language plan into a real Gantt chart from Claude Desktop, Cursor, or any MCP client — no account, no API key.

Remote server (no install)

Point your MCP client at https://loopgantt.com/api/mcp (Streamable HTTP). Nothing to install, no account, no key.

• Claude (claude.ai / Claude Desktop): Settings → Connectors → Add custom connector → URL https://loopgantt.com/api/mcp.
• ChatGPT: Settings → Connectors → Create → MCP server URL https://loopgantt.com/api/mcp, authentication None.
• Cursor and other clients (mcp.json):

{
  "mcpServers": {
    "loopgantt": {
      "url": "https://loopgantt.com/api/mcp"
    }
  }
}

The remote server exposes the keyless tools, resources and prompt below. The account tools (create_project, list_projects) need an API key and are only available on the local server for now.

Local server (npm)

npm install -g @loopgantt/mcp-server

Add to your MCP client config (Claude Desktop: claude_desktop_config.json):

{
  "mcpServers": {
    "loopgantt": {
      "command": "loopgantt-mcp"
    }
  }
}

Restart the client and ask:

• "Make a Gantt chart for a 6-week website relaunch"
• "Plan a kitchen renovation with realistic durations and dependencies"
• "Schedule the launch of our mobile app starting September 1"

Your assistant drafts the tasks, durations and dependencies; LoopGantt schedules them with its critical-path engine and replies with a picture of the chart, the dates, the critical path and a link where you can view the chart, export it (PNG / PDF) and save it to a free account.

Unclaimed charts expire after 7 days (30 days once the link is opened). Saving to an account keeps them forever.

Tools

create_gantt — no key needed

| Parameter | Description | | ------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | name (required) | Project name | | description | Optional one-liner | | startDate | YYYY-MM-DD, defaults to today | | workDays | Working weekdays as ISO numbers 1 (Mon) … 7 (Sun); default Mon–Fri | | holidays | Non-working dates, YYYY-MM-DD | | tasks (required) | In execution order: { name, duration, isMilestone?, description?, dependencies? } — duration in working days (0 = milestone); dependencies are indices of earlier tasks, or { task, type: FS\|SS\|FF\|SF, lag } |

Limits: 300 tasks, 20 dependencies per task, 10 charts per hour and 30 per day per network (the hosted server at loopgantt.com/api/mcp allows 60 per hour and 300 per day per network, because hosted assistants share a few addresses). Dates in replies are the first and last working day of each task.

schedule_project — no key needed

Same input as create_gantt (name optional). Returns dates, critical path, float and the project end without storing anything — for "what's my critical path?" / "when would this finish?" questions. Limit: 60 calls per hour per network.

list_templates / get_template — no key needed

The industry templates (software, construction, marketing, events, IT, HR, finance) with their task lists, ready to adapt and pass to create_gantt. Also exposed as MCP resources (loopgantt://templates/<slug>).

Prompt: plan_project

A guided flow — arguments goal, deadline?, team_size? — that drafts a work breakdown, creates the chart and presents the picture, the critical path and the link.

With an API key — account tools

Get a key at https://loopgantt.com/settings/api-keys and pass it as an environment variable:

{
  "mcpServers": {
    "loopgantt": {
      "command": "loopgantt-mcp",
      "env": { "LOOPGANTT_API_KEY": "sk_live_…" }
    }
  }
}

This enables create_project (creates the project directly in your account) and list_projects.

Environment variables

| Variable | Description | Required | | ------------------- | ----------------------------------------------------- | -------- | | LOOPGANTT_API_KEY | Enables the account tools | No | | LOOPGANTT_API_URL | API base URL (default https://loopgantt.com/api/v1) | No |

API

The server is a thin client over LoopGantt's public API — see the OpenAPI spec at https://loopgantt.com/openapi.json.

License

MIT