B20 Permit Inspector

🆕 Every B20 has ERC-2612 permit built in — approve a spender by signature instead of a transaction. Reads exactly what an agent needs to build a valid permit: the token's DOMAIN_SEPARATOR, the owner's current nonce (so the signed payload can't be rejected/replayed), and the EIP-712 domain/type struct. Read-only — signs nothing.

Resource: 402.com.tr/api/x402/b20-permit

Network: eip155:8453 · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0x973a31858f4d2125f48c880542da11a2796f12d6

Payment methods: — · Last validation: 2026-09-14 12:09:02.293+00

{
  "input": {
    "type": "object",
    "required": [
      "type",
      "method"
    ],
    "properties": {
      "type": {
        "type": "string",
        "const": "http"
      },
      "method": {
        "enum": [
          "GET"
        ],
        "type": "string"
      },
      "pathParams": {
        "type": "object"
      },
      "queryParams": {
        "type": "object",
        "required": [
          "address"
        ],
        "properties": {
          "owner": {
            "type": "string",
            "description": "Owner wallet (for the nonce, optional)"
          },
          "address": {
            "type": "string",
            "description": "B20 token address"
          }
        }
      }
    },
    "additionalProperties": false
  },
  "output": {
    "type": "object",
    "required": [
      "type"
    ],
    "properties": {
      "type": {
        "type": "string"
      },
      "example": {
        "type": "object"
      }
    }
  },
  "paymentRequirements": [
    {
      "raw": {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x973a31858f4d2125f48c880542da11a2796f12d6",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "payTo": "0x973a31858f4d2125f48c880542da11a2796f12d6",
      "scheme": "exact",
      "network": "eip155:8453",
      "amountAtomic": "30000"
    }
  ]
}

Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.