Index onlineMerchant portal
Api Endpoint

realx402-seller

Verify an x402 seller before paying it: does it exist and respond with a well-formed 402 challenge, is its own declared input/output schema internally consistent, and is its payout address sanctioned? Checked live against the seller itself plus Chainalysis's sanctions oracle and Blockscout (Base payTo addresses only). Confirms the checkable things about a seller check out -- not a guarantee of trustworthiness, which no free source can promise.

Open interactive test console

Offering

Provider
goodsong.dev
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Security
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://goodsong.dev/verify/seller
MIME type
Not provided
First seen
2026-10-16T01:50:14.534Z
Last seen
Tags
seller, Trust, X402, due-diligence, marketplace

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0xf3b36a95913eb2676fcdedb2ba6b0c96ade58de1"
  }
]

Observed health

Status
Unreachable
Latest latency
28 ms
Average latency
30 ms
HTTP status
Not provided
Last checked
Reachability
92.9% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "description": "Provide the exact x402 resource URL; method defaults to POST.",
      "properties": {
        "method": {
          "description": "HTTP method that triggers the seller's 402 challenge.",
          "enum": [
            "GET",
            "POST"
          ],
          "type": "string"
        },
        "resource_url": {
          "description": "The x402 resource URL to verify.",
          "type": "string"
        }
      },
      "required": [
        "resource_url"
      ]
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "properties": {
        "canonical": {
          "type": [
            "object",
            "null"
          ]
        },
        "checks": {
          "type": "object"
        },
        "cost": {
          "type": "object"
        },
        "evidence": {
          "type": "array"
        },
        "latency_ms": {
          "type": "integer"
        },
        "verdict": {
          "enum": [
            "confirmed",
            "contradicted",
            "unknown"
          ],
          "type": "string"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}