Evidence row 120283

Observed 26 Oct 2026, 14:40 UTC, by baseline/1.

Kind: listing
About: source_record x402_bazaar:https://saylorinnovations.com/api/kb/reliable-webhook
Recorded: 26 Oct 2026, 14:40 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: f9ef7bcc2528f6257120674a5776f0de0600ab325d976abb768c0fcb0518ec9c
Leaf: 0x810187e9fb8eea73c85e7e7cbf312b37e026bcbf59d603afe4643ed4c26b6e0d

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/reliable-webhook"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:reliable-webhook",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:reliable-webhook",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:reliable-webhook",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:reliable-webhook",
          "reference": "BLLAT9u7Z2WyU5ibQvAYUKpaeQxMfnaLEVKPurpkvWwp",
          "session": "eyJhcnRpY2xlSWQiOiJyZWxpYWJsZS13ZWJob29rIiwicmVmZXJlbmNlIjoiQkxMQVQ5dTdaMld5VTVpYlF2QVlVS3BhZVF4TWZuYUxFVktQdXJwa3ZXd3AiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjQzMjE0MzA3M30.Ee6b-C6tAfgtw0c_3bj4K70853_f4wXE1stjsm_G9S8"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:reliable-webhook",
          "reference": "CF7rTCgKvxNKapYHHG5jz84CrFDFn3ozSry5JDz9FEk9",
          "session": "eyJhcnRpY2xlSWQiOiJyZWxpYWJsZS13ZWJob29rIiwicmVmZXJlbmNlIjoiQ0Y3clRDZ0t2eE5LYXBZSEhHNWp6ODRDckZERm4zb3pTcnk1SkR6OUZFazkiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjQzMjE0MzA3NH0.T8GWZAY8VlBlKc_khdgOU7iyTUumuf2P1saH6DqHwC4"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "93206",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:reliable-webhook",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "96089",
          "reference": "C58KkmmwYvYKeFxVZL7yEHN6SQX38cWZ2r4AmbCxmKfs",
          "session": "eyJhcnRpY2xlSWQiOiJyZWxpYWJsZS13ZWJob29rIiwicmVmZXJlbmNlIjoiQzU4S2ttbXdZdllLZUZ4VlpMN3lFSE42U1FYMzhjV1oycjRBbWJDeG1LZnMiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTMyMDYsImV4cCI6MTc5MjQzMjE0MzA3NH0.up1Rd3XoctwazTSZ-JnvOwJEa7r3YagIhj9E5TfHSMo",
          "solUsdPrice": 104.07
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Reliable webhook receiver - raw-body auth, replay protection, durable queue and idempotent processing",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "A webhook receiver that authenticates the exact raw request, blocks replay, acknowledges within provider deadlines, durably queues work, processes idempotently, retries with bounded policy, and supports replay/reconciliation without duplicate business effects.",
              "c": "Self-Hosting & Infra",
              "id": "reliable-webhook",
              "t": "Reliable Webhook Implementation Guide"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790235422/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-19T17:47:03.111Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-19T17:47:02.793Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/reliable-webhook",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "webhooks",
      "retries",
      "idempotency",
      "reliability"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Reliable webhook receiver - raw-body auth, replay protection, durable queue and idempotent processing"
}

What the leaf hashes

{"body":"f9ef7bcc2528f6257120674a5776f0de0600ab325d976abb768c0fcb0518ec9c","id":120283,"kind":"listing","method":"baseline/1","observed_us":1793025617598325,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/reliable-webhook","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

0x810175108374d829a19e1896990bc1372fc38b7f0610f872a693442312fdbce0
0x63c04e3cb6fae2e5b0e6005f7a5d480d260918764128106d8069916bcf551474
0x14f6611965d97b57601a852e158412470220f54d4dbb741ede95abdf60490c02
0xf81fd7f2fc6150d9cee693564c47e1e78b5f5365db75e23d612da81a9527d0dd
0xb7b69480556523797814d88818c940a9ca42677ebd0f9deef44d53efe3985428
0x5067807160645debabe6b85b77fa707263dfdac13698f1ddda38ff121a68862a
0xcb419b79a00e24665b10440e23745f320bdeb86df770c701c27a4cdcbc52c7ed
0x9b0da25202c2e56305d588bc381c14195e4068e9018af00e423063494d380994
0xffe3639fbe063178a0481f38e8a6ca0cdb824dd41ea09ad7a496ae37f7cfe391
0x836b84f8e93674b08861122bb833431f014aff63ef724715df187e6998b02882
0x62490dd1c15d5301c6fb2c08f1d6ceb3a0d4c216f6e742424332881907db0fcd
0xb9c4107c5cbaf0844324e5ba287c90e0643bb7b9e48e7877adda9372132cf0ea
0x4d2ee986a690e903126f449b4e9e62d5572b350357ab4496a83488949b131c29
0x0eff463856b0992d53ab7d8c0b97c71541413358bdd445710c1e4b6aeb4d8f78
0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON