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⚡ llm_chat_completions — x402 v2 & MCP Tool

OpenAI-compatible LLM Chat Completions Gateway ($0.002 USDC/call). Drop-in replacement for /v1/chat/completions settled in Base USDC via x402 with zero account or API key required.

• x402 Endpoint: POST https://agent-kiosk.vercel.app/v1/chat/completions
• Price: $0.002 USDC on Base Mainnet (eip155:8453)
• MCP Endpoint: https://agent-kiosk.vercel.app/mcp (Tool name: llm_chat_completions)

Input JSON Schema

{
  "type": "object",
  "properties": {
    "prompt": {
      "type": "string",
      "description": "User prompt or question for the LLM"
    },
    "messages": {
      "type": "array",
      "description": "Optional OpenAI-format messages array [{role: 'user', content: '...'}]"
    },
    "model": {
      "type": "string",
      "description": "Model alias (default: 'gpt-4o-mini')"
    },
    "payment_signature": {
      "type": "string",
      "description": "Optional x402 v2/v1 Base64 or JSON EIP-3009 USDC payment signature to unlock the full unmasked dataset directly via MCP"
    },
    "x_api_key": {
      "type": "string",
      "description": "Optional ak_live_... 30-day Prepaid API Pass key to unlock the full unmasked dataset"
    }
  }
}