{
  "protocol": "x402",
  "x402Version": 2,
  "description": "TAG.GDP micropayment discovery for AI agents. Paid certification resources advertise HTTP 402 with PAYMENT-REQUIRED headers.",
  "challenge": "https://taggdp.global/x402/challenge",
  "apiDiscovery": "https://taggdp.global/api/public/x402",
  "paidResources": [
    "https://taggdp.global/api/public/x402/courses/{slug}",
    "https://taggdp.global/x402/challenge"
  ],
  "headers": {
    "paymentRequired": "PAYMENT-REQUIRED",
    "paymentSignature": "PAYMENT-SIGNATURE",
    "paymentResponse": "PAYMENT-RESPONSE"
  },
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:84532",
      "asset": "USDC",
      "rail": "x402"
    }
  ],
  "documentation": {
    "x402": "https://docs.x402.org/core-concepts/http-402",
    "site": "https://taggdp.global/llms.txt",
    "openapi": "https://taggdp.global/openapi.json"
  }
}