How to install the CustomGPT.ai Claude Code plugin

Before you start

You need:

• A CustomGPT.ai account (app.customgpt.ai)
• Your CustomGPT.ai API key (app.customgpt.ai/profile#api-keys)
• Claude Code installed
• curl (pre-installed on macOS, Linux, and Windows 10+)

The plugin is available on all CustomGPT.ai plans.

Install the plugin

Visit github.com/Poll-The-People/customgpt-for-claude-code, then run these three commands in Claude Code:

/plugin marketplace add Poll-The-People/customgpt-for-claude-code
/plugin install customgpt-ai-rag@poll-the-people-customgpt-for-claude-code
/reload-plugins

Connect your API key

The plugin looks for your API key in this order:

1. Environment variable: $CUSTOMGPT_API_KEY
2. A .env file in your project (or any parent folder): CUSTOMGPT_API_KEY=your_key
3. A config file at ~/.claude/customgpt-config.json

To save your key for all projects:

echo '{"apiKey":"YOUR_KEY_HERE"}' > ~/.claude/customgpt-config.json

If no key is found when you first run a skill, the plugin will prompt you and save it automatically.

Verify the install

Run /help in Claude Code. You should see the CustomGPT.ai skill list.

Plugin not loading? If /help doesn't show the CustomGPT.ai skills after /reload-plugins, close and reopen Claude Code, then run /reload-plugins again.

No account yet? Sign up at app.customgpt.ai.

curl not found? Install it from curl.se.

Next step

Make your first project searchable - see How to Make Your Project Searchable with the Claude Code Plugin.

Related articles

• How to Make Your Project Searchable with the Claude Code Plugin
• How to Search and Manage Your Project
• How the Claude Code Plugin Works