Before this step, read **[Connect your assistant](/en/mcp/connect/)** — the shared requirements (Pro or
Enterprise plan, an API key) and the verification note.

## Via CLI

```bash
claude mcp add --transport http nuntius https://mcp.nuntius.chat/mcp \
  --header "X-Api-Key: <your full API key>"
```

## Or an `.mcp.json` file

Project root, or `~/.claude.json` for a user-wide entry:

```json
{
  "mcpServers": {
    "nuntius": {
      "type": "http",
      "url": "https://mcp.nuntius.chat/mcp",
      "headers": { "X-Api-Key": "<your full API key>" }
    }
  }
}
```

## Verify it

Ask Claude to call the **`nuntius_status`** tool — if everything is right, you'll see your tenant,
your plan and your effective scopes. If something fails, continue with
**[Limits, errors and troubleshooting](/en/mcp/troubleshooting/)**.

## See also

- **[Connect your assistant](/en/mcp/connect/)** — requirements shared by all three clients.
- **[Tools catalog](/en/mcp/tools/)** — what your assistant can do once connected.
- **[Claude Desktop](/en/mcp/clients/claude-desktop/)** and **[Cursor](/en/mcp/clients/cursor/)** — the
  other two verified clients.