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mirrored listing x402 eip155:8453eip155:137algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=

Second Opinion: an independent adversarial agent attempts to refute your claim (live web r

Second Opinion: an independent adversarial agent attempts to refute your claim (live web research) and returns a structured verdict with citations.

Do you run secondopinionx402.com? This listing was mirrored from Coinbase's public Bazaar. Claim it in 30 seconds — no account required — and it becomes verified, permanently overriding the mirrored copy.

Claim this listing
200000 (raw units)
price
3
calls / 30d
1
unique payers
2026-08-22
updated

Provider

secondopinionx402.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xa12d480B17797f2401949130bEcBeC24c754ed30",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "200000",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xa12d480B17797f2401949130bEcBeC24c754ed30",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "200000",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
    "payTo": "X4BGQO53SBYIPXGE22E3C4BXJZKYKUYG3PZQVDBNUIVB64D6K7MEVGGCSM",
    "asset": "31566704",
    "amount": "200000",
    "maxTimeoutSeconds": 120
  }
]

Output schema

{
  "bazaar": {
    "category": "api",
    "discoverable": true,
    "info": {
      "input": {
        "body": {
          "properties": {
            "claim": {
              "maxLength": 2000,
              "minLength": 8,
              "type": "string"
            },
            "claimed_sources": {
              "items": {
                "type": "string"
              },
              "maxItems": 5,
              "type": "array"
            },
            "context": {
              "maxLength": 4000,
              "type": "string"
            }
          },
          "required": [
            "claim"
          ],
          "type": "object"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "citations": [
            "https://example.com/changelog"
          ],
          "confidence": 0.93,
          "summary": "The claim conflates two products…",
          "verdict": "refuted"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {}
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "bodyType",
            "body",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    },
    "tags": [
      "verification",
      "fact-check",
      "claims",
      "adversarial",
      "trust",
      "citations",
      "research",
      "verdict",
      "receipts",
      "second-opinion",
      "hallucination",
      "guardrails",
      "ai-agents",
      "x402"
    ]
  }
}

Use it

curl

curl "https://secondopinionx402.com/v1/verify"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://secondopinionx402.com/v1/verify");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://secondopinionx402.com/v1/verify")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/9057.json, and this resource appears in /discovery/resources and /discovery/search.