Evidence row 66572

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.hergertsynthora.com/v1/top-crypto"
    ]
  ],
  "name": "SYNTHORA",
  "owner_address": "0x6d9f318463168ff637b50e5b9a21392e97c7c167",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "description": "SYNTHORA top-crypto: Top N cryptocurrencies by market cap (default 10, max 50): rank, price, 24h change, volume and market cap in USD. Source: CoinGecko free API, keyless, timestamped.",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300,
        "mimeType": "application/json",
        "network": "eip155:8453",
        "payTo": "0x6D9F318463168fF637b50E5b9a21392e97c7c167",
        "resource": "https://api.hergertsynthora.com/v1/top-crypto",
        "scheme": "exact"
      }
    ],
    "description": "SYNTHORA top-crypto: Top N cryptocurrencies by market cap (default 10, max 50): rank, price, 24h change, volume and market cap in USD. Source: CoinGecko free API, keyless, timestamped.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "limit": 10
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "niche": "top_crypto",
              "ok": true,
              "receipt": {
                "alg": "ed25519"
              },
              "result": {}
            },
            "schema": {
              "properties": {
                "error": {
                  "type": "string"
                },
                "niche": {
                  "type": "string"
                },
                "ok": {
                  "type": "boolean"
                },
                "receipt": {
                  "type": "object"
                },
                "result": {
                  "properties": {
                    "as_of_utc": {
                      "type": "string"
                    },
                    "coins": {
                      "type": "array"
                    },
                    "count": {
                      "type": "number"
                    },
                    "error": {
                      "type": "string"
                    },
                    "source": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                }
              },
              "required": [
                "ok",
                "niche"
              ],
              "type": "object"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "limit": {
                      "description": "top N, default 10, max 50",
                      "type": "integer"
                    }
                  },
                  "type": "object"
                },
                "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": {
              "properties": {
                "example": {
                  "niche": {
                    "type": "string"
                  },
                  "ok": {
                    "type": "boolean"
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "delivery": {
        "behaviour": "if the service FAILS (invalid input, timeout, stale cache, withdrawn product, malformed output) you receive 402 and are NOT charged",
        "note": "unlike the signature -- which you verify BEFORE paying -- this one is checked afterwards, on-chain, from your own wallet",
        "order": "compute -> failure gate -> verify -> settle -> deliver",
        "policy": "no-charge-on-service-failure",
        "scope": "this covers service FAILURE, not verdict quality",
        "verify": "after a request of yours FAILS, check your own wallet on Base: no USDC settlement to our payTo will exist for it. If we had charged you, the transfer would be public and permanent"
      },
      "signature": {
        "alg": "ed25519",
        "canon": "json:sort_keys+separators(,:)+ensure_ascii+utf8",
        "envelope": "{result, attestation:{alg,pubkey,sig,canon}}",
        "jwksUrl": "https://api.hergertsynthora.com/.well-known/jwks.json",
        "publicKeyUrl": "https://api.hergertsynthora.com/pubkey",
        "sigEncoding": "hex(64B raw)",
        "verify": "recompute canon from envelope.result, then VerifyKey(bytes.fromhex(pubkey)).verify(canon, bytes.fromhex(sig)) -- no name to trust, verify the signature yourself"
      }
    },
    "lastUpdated": "2026-10-24T15:17:36.055Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-24T15:17:35.451Z"
    },
    "resource": "https://api.hergertsynthora.com/v1/top-crypto",
    "serviceName": "SYNTHORA",
    "tags": [
      "crypto",
      "market-cap",
      "coingecko",
      "realtime"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "SYNTHORA top-crypto: Top N cryptocurrencies by market cap (default 10, max 50): rank, price, 24h change, volume and market cap in USD. Source: CoinGecko free API, keyless, timestamped."
}

What the leaf hashes

{"body":"911323b74ad218d2c9cf3518cef10e9fb81756bfedc733b09403f1c3a3aee664","id":66572,"kind":"listing","method":"baseline/1","observed_us":1793025460813660,"prev":null,"subject":"x402_bazaar:https://api.hergertsynthora.com/v1/top-crypto","subject_kind":"source_record"}

Proof

Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.