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Set up MCP

The Model Context Protocol (MCP) is an open standard that lets AI assistants connect to external services. Once your AI assistant is connected to Attendium, you can manage events, guest lists, passes and more through conversation.

Attendium MCP Server URL: https://api.attendium.com/mcp

We recommend Claude (Claude.ai, Claude Desktop or Claude Code) for the most reliable results.

Example prompts

Once connected, try prompts like these:

  • "Add John and Amanda Smith to the VIP list for today's event. Both free."
  • "Create events for this weekend, same structure as last weekend."
  • "Check if John Smith was checked in at any event in the last month."
  • "How many guests are checked in at tonight's event?"
  • "Give Sarah Johnson a season pass and send it to sarah@example.com."
  • "Create an event from the Friday Night template for next Friday, 8 PM to 2 AM."

Claude

Claude.ai and Claude Desktop

  1. Go to Customize > Connectors
  2. Select + Add and then Add custom connector
  3. Enter "Attendium" as the name and https://api.attendium.com/mcp as the server URL
  4. Continue through the sign-in settings, keeping the suggested ones, and then select Add

On a Team or Enterprise plan, an owner adds the connector for the whole organization under Organization settings > Connectors. Members then go to Customize > Connectors, find Attendium and select Connect.

Claude Code

Execute this terminal command:

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

ChatGPT

Note

Adding Attendium to ChatGPT requires developer mode, which isn't available on every ChatGPT plan. In a Business, Enterprise or Edu workspace, an admin may need to allow it first.

Enable developer mode

  1. Go to Settings > Security and login
  2. Select Developer mode to turn it on

In some workspaces, Developer mode is under Settings > Apps > Advanced settings instead.

Add the plugin

  1. Go to Plugins
  2. Select + and then Add custom MCP server
  3. Enter "Attendium" as the name and https://api.attendium.com/mcp as the server URL
  4. Confirm the warning about custom MCP servers
  5. Select Create as a plugin

Use in a conversation

  1. Start a new conversation
  2. Type @ in the message box and select Attendium

Gemini

Gemini supports MCP via the Gemini CLI.

Execute this terminal command:

gemini mcp add --transport http attendium https://api.attendium.com/mcp