The AI Chat Widget block, found in the Conversion category, is genuinely different from the Live Chat block described in "Live Chat with your visitors": Live Chat connects a visitor with you, a real person replying from your project's Inbox, while the AI Chat Widget answers visitors automatically, using an AI model, with no human needed on your end at all. It's also a different thing from the AI Assistant add on described in "What is the AI Assistant add-on and how much does it cost?", that one is a private, editor only assistant for you, the project owner, while you're building, it never appears on your published site. The AI Chat Widget is the opposite, it appears right on your published site, for your visitors. The AI Chat Widget requires a Creator plan, see "Free, Plus, and Creator plans compared."
Bring your own key
From your website project's Integrations tab, under its own AI chat widget section, connect your own Anthropic or OpenAI API key, whichever provider you'd rather use. Usage is billed directly by that provider, on your own account with them, never by CodeBlock Studio, and your key is never shared with any other project or account.
What it knows
Every reply combines two sources automatically: your website's own actual page content, nothing extra to set up for that part, plus any extra knowledge you choose to add yourself, written as plain text in that same Integrations tab, your opening hours, a shipping policy, answers to common questions, anything you want it to know beyond what's already on your pages. Both sources are used together, not one or the other.
Block settings
The block's own panel (separate from the Integrations tab above) lets you set a title, a greeting message shown before a visitor types anything, and which corner it floats in, bottom right or bottom left.
Tip: If you ever remove your API key from the Integrations tab, the widget simply stops answering until you reconnect one, nothing about your site breaks.