# Does AddCal have an MCP server?

**Yes — Official.** AddCal maintains an official MCP server.

## Facts

- Verdict: Official (Yes)
- Access: Remote server — Hosted by the vendor — no install, connect over HTTP with OAuth or a token.
- Endpoint: `https://addcal.co/mcp`
- Repository: [addcal/mcp](https://github.com/addcal/mcp) — ★ 1, last push 2026-08-14, MIT
- Maintainer: AddCal
- Category: [Workplace & Productivity](https://mcpyet.com/category/workplace-productivity/)
- Verified against vendor docs: 2026-09-29
- GitHub data refreshed: 2026-09-29 (re-checked every 6 hours)

## What it does

> MCP server for AddCal: manage the calendars other people subscribe to. Remote streamable HTTP endpoint, OAuth, 19 tools.
> — how [addcal/mcp](https://github.com/addcal/mcp) describes itself

Project site: <https://addcal.co/documentation/mcp-server>

## The receipts

- **Vendor-hosted (remote):** `https://addcal.co/mcp` — a remote server run by AddCal itself, nothing to install. Documented at <https://addcal.co/documentation/mcp-server>.
- **Official repository:** [addcal/mcp](https://github.com/addcal/mcp) — ★ 1, pushed 2026-08-14, MIT (maintained)

## How to connect it

Hosted by the vendor — no install, connect over HTTP with OAuth or a token.

### Claude Code

```sh
claude mcp add --transport http addcal https://addcal.co/mcp
```

Add `--scope user` to make it available in every project.

### Claude Desktop

1. Open **Settings → Connectors**
2. Click **Add custom connector**
3. Paste `https://addcal.co/mcp`
4. Finish the sign-in prompt, then enable it in the chat's tools menu

### Cursor

Add to `.cursor/mcp.json` in your project, or `~/.cursor/mcp.json` for every project:

```json
{
  "mcpServers": {
    "addcal": {
      "url": "https://addcal.co/mcp"
    }
  }
}
```

### VS Code

Add to `.vscode/mcp.json`, then pick the server from Copilot's agent-mode tools menu:

```json
{
  "servers": {
    "addcal": {
      "type": "http",
      "url": "https://addcal.co/mcp"
    }
  }
}
```

### ChatGPT

1. Enable **Developer mode** under Settings → Apps & Connectors → Advanced
2. Choose **Create** and paste `https://addcal.co/mcp`
3. Complete sign-in, then enable the connector in a new chat

## How we know

Published to the MCP Registry under AddCal's verified namespace co.addcal; the hosted endpoint addcal.co/mcp is documented at addcal.co/documentation/mcp-server and in the addcal/mcp repo, and answers MCP initialize with 401 (OAuth required).

- GitHub data refreshed 2026-09-29, then every 6 hours.
- Vendor docs verified on 2026-09-29.
- Corrections: hello@mcpyet.com.

## Also in Workplace & Productivity

- [Atlassian](https://mcpyet.com/mcp/atlassian.md) — Official (Yes)
- [Google Drive](https://mcpyet.com/mcp/google-drive.md) — Official (Yes)
- [Confluence](https://mcpyet.com/mcp/confluence.md) — Official (Yes)
- [ServiceNow](https://mcpyet.com/mcp/servicenow.md) — Official (Yes)
- [Excalidraw](https://mcpyet.com/mcp/excalidraw.md) — Official (Yes)
- [Google Sheets](https://mcpyet.com/mcp/google-sheets.md) — Official (Yes)

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Source: https://mcpyet.com/mcp/addcal/ — data refreshed 2026-09-29