Evidence row 1791520

Observed 1 Nov 2026, 19:06 UTC, by sync.x402_bazaar/1.

Kind: listing
About: source_record x402_bazaar:https://minty-sprout.onrender.com/v1/x402-listing-doctor
Recorded: 1 Nov 2026, 19:06 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: 855ea85c6560467cbee708d74a524a7a5da6881c294e81597bbbd95ca1d29c72
Leaf: 0x1335bfd85871ecf8e7484e80d228f5a582b4bee3726ae16856042e64a4fc4045

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://minty-sprout.onrender.com/v1/x402-listing-doctor"
    ]
  ],
  "name": "Foundry",
  "owner_address": "0x11dced0487ca3e7d9032029dcb302253ccf4e0de",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x11DCED0487cA3E7d9032029DCb302253ccF4e0DE",
        "scheme": "exact"
      }
    ],
    "description": "x402 listing doctor for sellers: why a paid endpoint gets no buyers. Runs the x402 preflight, Coinbase's CDP validator, and presence checks in the CDP Bazaar and 402index, then returns concrete fixes: 402 before input validation, Bazaar metadata, description over 500 chars or instruction-like, slow or sleeping host, no settled sale yet. Input: endpoint URL, optionally 'POST <url>'. Deterministic, no LLM.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "input": "https://x402-preflight.nextill-pos.workers.dev/v1/preflight"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "cdp_validation": {
                "failed_checks": [
                  "returns_402"
                ],
                "outcome": "rejected",
                "valid": false
              },
              "fixes": [
                "[block] returned HTTP 400, not 402 Payment Required",
                "[block] CDP check returns_402: Endpoint returned HTTP 400 instead of 402",
                "[info] not in 402index: free registration at POST https://402index.io/api/v1/register"
              ],
              "listed": {
                "402index": false,
                "cdp_bazaar": false
              },
              "url": "https://money-reactor.makar52nn2016.workers.dev/api/http-check",
              "verdict": "block"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "input": {
                      "description": "URL of your paid x402 endpoint, optionally prefixed with GET or POST",
                      "maxLength": 8000,
                      "type": "string"
                    }
                  },
                  "required": [
                    "input"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "cdp_validation": {
                      "type": "object"
                    },
                    "fixes": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "listed": {
                      "type": "object"
                    },
                    "verdict": {
                      "enum": [
                        "ok",
                        "warn",
                        "block"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-31T22:31:47.09Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-31T22:31:46.901Z"
    },
    "resource": "https://minty-sprout.onrender.com/v1/x402-listing-doctor",
    "serviceName": "Foundry",
    "tags": [
      "x402",
      "seller",
      "bazaar",
      "listing",
      "discovery"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "x402 listing doctor for sellers: why a paid endpoint gets no buyers. Runs the x402 preflight, Coinbase's CDP validator, and presence checks in the CDP Bazaar and 402index, then returns concrete fixes: 402 before input validation, Bazaar metadata, description over 500 chars or instruction-like, slow or sleeping host, no settled sale yet. Input: endpoint URL, optionally 'POST <url>'. Deterministic, no LLM."
}

What the leaf hashes

{"body":"855ea85c6560467cbee708d74a524a7a5da6881c294e81597bbbd95ca1d29c72","id":1791520,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559984912238,"prev":null,"subject":"x402_bazaar:https://minty-sprout.onrender.com/v1/x402-listing-doctor","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).
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Day root: 0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3
Chained: 0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4
Published: On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90

How to check it · This row as JSON