# Cards Against AI (Apps SDK example) (ChatGPT App)

> Card game driven by ChatGPT with a real-time synced widget

- Type: app
- Publisher: OpenAI (official)
- Categories: Development
- Website: https://github.com/openai/openai-apps-sdk-examples/tree/main/cards_against_ai_server_node
- Docs: https://developers.openai.com/apps-sdk
- Source: https://github.com/openai/openai-apps-sdk-examples
- GitHub stars: 2350
- Listed: 2026-01-23

## About

A Node MCP Apps backend that drives a card game through ChatGPT's model while keeping a real-time widget in sync. A single server serves both the MCP endpoint and the widget assets.

## How to use

1. **Add it in ChatGPT** Open Cards Against AI (Apps SDK example) in ChatGPT's Plugin directory (sidebar → Plugins, then search), select + to add it and sign in if asked.

2. **Use it in a chat** Type @ in the composer and pick Cards Against AI (Apps SDK example), or start your message with its name. ChatGPT may also suggest it when it fits what you ask.

## Example prompts

- "Start a game of Cards Against AI"
- "Deal me a new hand"
- "Pick the funniest answer this round"

## Also available as

- plugin: [Codex Security](https://chatgptplugins.directory/plugins/codex-security.md)
- MCP server: [OpenAI Docs MCP](https://chatgptplugins.directory/mcp/openai-docs.md)

## Related

- [GitHub](https://chatgptplugins.directory/apps/github.md): Triage PRs, issues and CI across your repositories
- [Figma](https://chatgptplugins.directory/apps/figma.md): Create designs, diagrams and FigJam boards and ship them to code
- [MCP App Basics (Apps SDK example)](https://chatgptplugins.directory/apps/apps-sdk-mcp-app-basics.md): Eleven interactive widgets that each teach one MCP Apps API
- [Authenticated Server (Apps SDK example)](https://chatgptplugins.directory/apps/apps-sdk-authenticated.md): Demonstrates tools that require different levels of OAuth
- [Shopping Cart (Apps SDK example)](https://chatgptplugins.directory/apps/apps-sdk-shopping-cart.md): Keeps cart state in sync across tool calls with widgetSessionId
- [Kitchen Sink Lite (Apps SDK example)](https://chatgptplugins.directory/apps/apps-sdk-kitchen-sink-lite.md): Minimal widget + server showing the full window.openai surface

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Source: https://chatgptplugins.directory/apps/apps-sdk-cards-against-ai · Index: https://chatgptplugins.directory/llms.txt · Independent and community-run. Not affiliated with or endorsed by OpenAI. ChatGPT is a trademark of OpenAI.