Zephyr Agent: Add AI chat to any website for $9

How it works

Buy once

One payment, no subscription. You get a proxy token and a setup link.

Paste your API key

Enter your Anthropic or OpenAI key. It's AES-256 encrypted at rest. Only a proxy token is ever exposed in your HTML, never the key itself.

Add one tag

Drop <z-agent> into any HTML page. Done.

The whole integration:

<script src="https://cdn.jsdelivr.net/npm/zephyr-framework@0.3/zephyr-framework.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/zephyr-framework@0.3/zephyr-agent-widget.min.js"></script>

<z-agent data-endpoint="https://zephyr-agent.sh/api/proxy/your-token"></z-agent>

The token in your HTML is a lookup key, not your API key. Your actual key never leaves the server.

Built on Zephyr Framework

The <z-agent> widget ships with the open-source Zephyr Framework. 14 components designed for AI agents to control via natural language.

This site is the optional hosted backend so you don't have to deploy your own. Want to run it yourself? Fork the demo and click Deploy.

View Framework Try the Demo

Common questions

Yes. Your key is encrypted with AES-256-GCM before being stored — the same standard used by banks. Only a proxy token is ever in your HTML. Someone who finds your token can make chat requests through the proxy (rate-limited to 30/min), but cannot extract your key.

Anthropic (Claude) and OpenAI (GPT). You pick which one when you set up your proxy. Your key, your provider, your costs — we're just the secure middleman.

The proxy enforces a 30 requests per minute rate limit per token to prevent abuse. There's no monthly cap — you're only limited by your own LLM provider's rate limits and your account credits.

Email support and we'll resend it. Your proxy token and encrypted key stay intact — nothing gets deleted.

Zephyr Framework is the open-source library that ships <z-agent> and 13 other components built for AI agents to control. It's free and lives at github.com/daltlc/zephyr-framework. This $9 service is optional. It's just the hosted proxy backend so you don't have to run your own.

Yes. Fork zephyr-agent-demo, click Deploy to Vercel, drop in your own ANTHROPIC_API_KEY. The $9 here saves you that step, keeps your key encrypted in our store, and works on hosts without serverless functions (Webflow, Squarespace, GitHub Pages).