cedar-mcp

# cedar-mcp

Cursor plugin for **CedarAI Data Depot**. The plugin identifier is `cedar-mcp`.

It connects Cursor to Cedar ARMS through Cedar's remote [Model Context Protocol](https://modelcontextprotocol.io/) server.

After Cedar login, you can list the carriers you can access and inspect **read-only** railcar inventory, equipment history, work orders, bookings, customers, charges, invoices, quotes, and note metadata. This connector cannot create, update, move, or delete ARMS records. Mutations belong in the ARMS UI.

## Install

1. Open **Cursor Settings → Plugins** (or the [Cursor Marketplace](https://cursor.com/marketplace)).
2. Search for **cedar-mcp** or **CedarAI Data Depot**.
3. Click **Install**, then complete Cedar sign-in (OAuth).

You can also add the MCP URL by hand under **Cursor Settings → MCP**:

```
https://mcp.arms.cedarai.com/mcp
```

### GitHub Copilot / VS Code

After this server is published to the [official MCP Registry](https://registry.modelcontextprotocol.io), search `@mcp cedar` in the VS Code Extensions view, or add it by hand in `.vscode/mcp.json`:

```json
{
  "servers": {
    "cedar-mcp": {
      "type": "http",
      "url": "https://mcp.arms.cedarai.com/mcp"
    }
  }
}
```

Then use **Auth** on the server and complete Cedar sign-in. Registry name: `io.github.cedarai/cedar-mcp`.

## MCP

```json
{
  "mcpServers": {
    "cedar-mcp": {
      "type": "http",
      "url": "https://mcp.arms.cedarai.com/mcp"
    }
  }
}
```

Auth is OAuth 2.0 against Cedar Accounts. Cursor prompts for Cedar sign-in when the plugin connects. There is no API key.

Pass a railroad road mark as `carrier_code` (for example `TRLD`) on catalog tools. Call `list_accessible_carriers` first if you are not sure which carriers you can access.

## Data handling

Each MCP request uses the signed-in user's existing ARMS permissions. Installing this plugin does not grant access to additional carriers or records.

Tool results are returned to Cursor so it can answer the user's request. Cedar minimizes sensitive fields before returning high-volume and free-text results, including street addresses, postal codes, email addresses, telephone numbers, note body text and attachments, invoice audit comments and documents, and selected tender and charge fields. Inventory responses are paginated and capped at 50 records per call.

Review the [MCP privacy addendum](https://docs.cedarai.com/user-docs/api-reference/mcp-privacy) and [MCP data handling documentation](https://docs.cedarai.com/user-docs/api-reference/mcp) before connecting.

## Docs

- Website: https://www.cedarai.com/
- MCP privacy addendum: https://docs.cedarai.com/user-docs/api-reference/mcp-privacy
- Company privacy policy: https://www.cedarai.com/privacy-policy/
- MCP data handling: https://docs.cedarai.com/user-docs/api-reference/mcp
- Terms: https://www.cedarai.com/aup/
- Support: https://www.cedarai.com/contact

The MCP **server** is hosted by Cedar. This repository is only the Cursor plugin wrapper (same pattern as Cursor's [Google Drive](https://github.com/cursor/plugins/tree/main/third_party/google-drive) plugin).

## License

MIT