Connect Claude

The server URL is https://app.lobbystack.com/api/mcp. Replace app.lobbystack.com with your own domain if you self-host. Claude connects to it from the internet, so a self-hosted LobbyStack needs a public HTTPS address. See MCP server for the tools each permission unlocks.

Claude and Claude Desktop connectors

Custom connectors work on the Free, Pro, Max, Team and Enterprise plans. The Free plan allows one custom connector.

Add the connector

In Claude, go to Customize > Connectors, click + Add, then Add custom connector. Name it LobbyStack, paste the server URL, and click Continue.On Team and Enterprise plans, an owner adds the connector under Organization settings > Connectors > Add > Custom > Web. Members then open Customize > Connectors and click Connect.

Review the sign-in settings

Claude detects that LobbyStack uses OAuth. Under OAuth client, keep Use Claude’s published identity (Recommended). Click Continue, then Add.

Connect and sign in

Click Connect. Claude opens LobbyStack. Sign in if you aren’t signed in already.

Choose the workspace and permissions

Pick the workspace, uncheck anything Claude shouldn’t do, and click Allow access. You go back to Claude, connected.

To disconnect, go to Settings > API keys in LobbyStack and click Disconnect next to Claude under MCP connections.

Claude Code

Add the server, then sign in from Claude Code:

claude mcp add --transport http lobbystack https://app.lobbystack.com/api/mcp

Start Claude Code, run /mcp, select lobbystack and choose to authenticate. Your browser opens the LobbyStack sign-in and consent page. To use an API key instead, pass it as a header:

claude mcp add --transport http lobbystack https://app.lobbystack.com/api/mcp \
  --header "Authorization: Bearer $LOBBYSTACK_API_KEY"

Claude Desktop with an API key

If you’d rather use an API key than the connector, run mcp-remote from Claude Desktop’s config file. It forwards requests to LobbyStack with your key. You need Node.js on your computer.

Open the config file

In Claude Desktop, go to Settings > Developer and click Edit Config.

Add LobbyStack

Add this entry under mcpServers and paste your key in place of lsk_...:

claude_desktop_config.json

{
  "mcpServers": {
    "lobbystack": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://app.lobbystack.com/api/mcp",
        "--header",
        "Authorization:${LOBBYSTACK_AUTH}"
      ],
      "env": {
        "LOBBYSTACK_AUTH": "Bearer lsk_..."
      }
    }
  }
}

The header value sits in env because some systems split arguments on spaces.

Restart Claude Desktop

Quit and reopen the app. LobbyStack’s tools appear under the tools menu in a new chat.

Claude API

The Messages API connects to remote MCP servers with the MCP connector. Send an API key, or an OAuth access token your app obtained, as authorization_token:

curl https://api.anthropic.com/v1/messages \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "anthropic-beta: mcp-client-2025-11-20" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-opus-5",
    "max_tokens": 4096,
    "mcp_servers": [{
      "type": "url",
      "url": "https://app.lobbystack.com/api/mcp",
      "name": "lobbystack",
      "authorization_token": "'"$LOBBYSTACK_API_KEY"'"
    }],
    "tools": [{ "type": "mcp_toolset", "mcp_server_name": "lobbystack" }],
    "messages": [{ "role": "user", "content": "Which messages are still open?" }]
  }'

Check the connection

Ask Claude to call get_business. It should answer with your business name, time zone and booking mode. If the call fails:

Symptom	Fix
The sign-in page says you can’t connect apps	Ask an owner of the workspace to connect Claude, or to make you an admin.
`401` or “unauthorized”	Connect again. With an API key, check that you copied the whole key and that nobody revoked it.
`403` or “insufficient_scope”	Connect again and allow at least one permission. With an API key, create one with a scope other than `webhooks:manage`.
A tool is missing	Connect again and allow the permission that tool needs.

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Self-hosting

Claude and Claude Desktop connectors

Claude Code

Claude Desktop with an API key

Claude API

Check the connection

​Claude and Claude Desktop connectors

​Claude Code

​Claude Desktop with an API key

​Claude API

​Check the connection

Claude and Claude Desktop connectors

Claude Code

Claude Desktop with an API key

Claude API

Check the connection