I built a working AI chatbot in 50 lines of HTML.
No backend. No build step. No framework.
One HTML file. One API key. Open it in your browser.
It works.
Here's the code:
<!DOCTYPE html>
<html>
<head><meta charset="UTF-8"><title>Minimal Chat</title></head>
<body>
<div id="chat"></div>
<input id="msg" placeholder="Ask anything..."
style="width:300px;padding:8px">
<button onclick="send()">Send</button>
<script>
const KEY = "mb-your-api-key-here";
function append(role, text) {
const div = document.createElement("div");
div.innerHTML = `<b>${role}:</b> ${text}`;
document.getElementById("chat").appendChild(div);
}
async function send() {
const input = document.getElementById("msg");
const prompt = input.value; input.value = "";
append("You", prompt);
const res = await fetch(
"https://aibridge-api.com/v1/chat/completions",
{
method: "POST",
headers: {
"Content-Type": "application/json",
"Authorization": `Bearer ${KEY}`,
},
body: JSON.stringify({
model: "deepseek-chat",
messages: [{ role: "user", content: prompt }],
}),
}
);
const data = await res.json();
append("AI", data.choices[0].message.content);
}
</script>
</body>
</html>
No npm install. No Express server. No .env files.
Save as chat.html, double-click, start talking.
Want streaming? Add "stream": true to the body.
Want a different model? Change "deepseek-chat" to "qwen-max".
That's the power of a truly OpenAI-compatible API.
14 models. One endpoint. Free tier is 500K tokens/month.




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