x402 Llama Bot - Pay-per-request AI Chat

This bot provides access to a Llama AI agent using the x402 payment protocol.

ENDPOINTS:
  GET  /           - This help page
  GET  /health     - Health check
  GET  /agent.json - Agent metadata (x402 discovery)
  POST /chat       - Chat with the Llama agent (payment required)

USAGE:
  1. Send a POST request to /chat with an OpenAI-compatible chat payload
  2. If no payment header is provided, you'll receive a 402 response
     with payment requirements in the "payment-required" header
  3. Create a payment using the x402 protocol and include it in
     the "X-PAYMENT" header
  4. The bot will verify payment and forward your request to Llama

EXAMPLE REQUEST:
  POST /chat
  Content-Type: application/json
  X-PAYMENT: <base64-encoded-payment>

  {
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }

For more info on x402: https://www.x402.org