x402 Merchant Audit

Name: x402 Merchant Audit
Price: 0.01 USDC
Availability: InStock

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TradingLiveeip155:8453Exactvia cdp

https://merchant-audit.clankerceo.workers.dev/audit

x402Due-diligenceTrustSafetySecurity

Calls · 30d

9→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far.

$0.01

Verified settled volume

7 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-08-31 23:24Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xCa03Fb4b1D2f66f5a83A5cA91021b874ac4a34a3

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xCa03Fb4b1D2f66f5a83A5cA91021b874ac4a34a3",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xCa03Fb4b1D2f66f5a83A5cA91021b874ac4a34a3",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:137",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "payTo": "CTmExzd1k8DNcmmuWGVCGoxsBshNcwFFhCe65QG57Vhd",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://merchant-audit.clankerceo.workers.dev/audit",
    "tags": [
      "x402",
      "due-diligence",
      "trust",
      "safety",
      "security",
      "verification",
      "scam-detection",
      "fraud",
      "risk",
      "merchant",
      "audit",
      "payment",
      "reputation",
      "agent",
      "before-you-pay",
      "endpoint-health"
    ],
    "mimeType": "application/json",
    "description": "Is this API safe to pay? Audit any x402 merchant or paid endpoint BEFORE you send money. Answers whether a service is trustworthy, whether it is a scam or dead, and whether it will actually deliver. Probes the live endpoint for a valid HTTP 402 challenge, detects price drift between the advertised price and the real challenge price, pulls settlement history and unique-buyer counts, and verifies on-chain USDC actually reaching the payTo address. Returns a PASS / CAUTION / AVOID verdict with the evidence behind it. Every check is measured live at request time — nothing cached, no reputation scores. Use before paying an unknown merchant, to avoid wasting money on dead or fraudulent endpoints.",
    "serviceName": "x402 Merchant Audit — Is This API Safe To Pay?"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "target": "https://example-merchant.com/api/some-service"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "checks": {
              "emits_402": true,
              "reachable": true,
              "has_buyers": false,
              "price_drift": false,
              "onchain_inflow_usdc": 0
            },
            "target": "https://example-merchant.com/api/some-service",
            "reasons": [
              "listed but no settlements in 30d"
            ],
            "verdict": "CAUTION"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "queryParams"
            ],
            "properties": {
              "type": {
                "enum": [
                  "http"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "target"
                ],
                "properties": {
                  "target": {
                    "type": "string",
                    "description": "Absolute https URL of the x402 resource to audit."
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "enum": [
                  "json"
                ],
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0xCa03…a34a3. The signed payment is good for 2 minutes.

Paid to: 0xCa03…a34a3
USD Coin contract: 0x8335…02913
Payment window: 2 minutes
As published: 10000 smallest units

10000units

on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xCa03…a34a3
Token contract: 0x3c49…c3359
Payment window: 2 minutes

10000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: CTmExz…57Vhd
Token contract: EPjFWd…TDt1v
Payment window: 2 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xCa03Fb4b1D2f66f5a83A5cA91021b874ac4a34a3",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xCa03Fb4b1D2f66f5a83A5cA91021b874ac4a34a3",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "payTo": "CTmExzd1k8DNcmmuWGVCGoxsBshNcwFFhCe65QG57Vhd",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "target": "https://example-merchant.com/api/some-service"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "checks": {
            "emits_402": true,
            "reachable": true,
            "has_buyers": false,
            "price_drift": false,
            "onchain_inflow_usdc": 0
          },
          "target": "https://example-merchant.com/api/some-service",
          "reasons": [
            "listed but no settlements in 30d"
          ],
          "verdict": "CAUTION"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "queryParams"
          ],
          "properties": {
            "type": {
              "enum": [
                "http"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "target"
              ],
              "properties": {
                "target": {
                  "type": "string",
                  "description": "Absolute https URL of the x402 resource to audit."
                }
              }
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "enum": [
                "json"
              ],
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-08-31 23:24Z
Last indexed by Roundhouse: 2026-09-24 08:00Z
Last enriched (probe, favicon, geo): 2026-09-23 17:15Z
x402 version: 2
Max timeout: 120s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service x402 Merchant Audit and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=x402%20Merchant%20Audit'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://merchant-audit.clankerceo.workers.dev/audit, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.