Evidence row 64552

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.agent-payload-tools.workers.dev/hmac"
    ]
  ],
  "name": "Agent Payload Tools",
  "owner_address": "0x6b2683f66d35b91ed05a1646c0305b02260b6acb",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x6B2683F66d35b91ED05a1646c0305b02260B6acB",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "6cBob4SADGcWdsMPxkSnJ9GYL5EvmENkJnjfeVPBTxfA",
        "scheme": "exact"
      }
    ],
    "description": "Create or verify an HMAC for a message or payload using SHA-256, SHA-384, or SHA-512. Useful for webhook signatures, shared-secret authentication, payload signing, and message integrity checks.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "algorithm": "SHA-256",
              "input": "message",
              "secret": "shared-secret"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "$schema": "http://json-schema.org/draft-07/schema#",
                  "properties": {
                    "algorithm": {
                      "description": "Digest algorithm. Defaults to SHA-256.",
                      "enum": [
                        "SHA-256",
                        "SHA-384",
                        "SHA-512"
                      ],
                      "type": "string"
                    },
                    "expected_hex": {
                      "description": "Optional hexadecimal digest to compare in constant time.",
                      "pattern": "^[0-9a-fA-F]*$",
                      "type": "string"
                    },
                    "input": {
                      "default": "",
                      "description": "UTF-8 message to authenticate.",
                      "type": "string"
                    },
                    "secret": {
                      "description": "HMAC secret for this call. It is not stored.",
                      "minLength": 1,
                      "type": "string"
                    }
                  },
                  "required": [
                    "secret"
                  ],
                  "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"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T20:41:59.472Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-25T20:41:59.332Z"
    },
    "resource": "https://api.agent-payload-tools.workers.dev/hmac",
    "serviceName": "Agent Payload Tools",
    "tags": [
      "HMAC",
      "SHA256",
      "authentication",
      "agent developer tools"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Create or verify an HMAC for a message or payload using SHA-256, SHA-384, or SHA-512. Useful for webhook signatures, shared-secret authentication, payload signing, and message integrity checks."
}

What the leaf hashes

{"body":"40a7c21a55ea4d669846070fd5c5f80eb3a743ac66323f130b58d02733e5dca9","id":64552,"kind":"listing","method":"baseline/1","observed_us":1793025456800303,"prev":null,"subject":"x402_bazaar:https://api.agent-payload-tools.workers.dev/hmac","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).

1. 0x6032d11865d966a4380cb3a00097d85a49e0ec0fc32af4a7cb671838cca05dfe
2. 0x8309085f973f8114f725369a5b7a83c100f478cb4e14a3be347f4f427afed6f2
3. 0x9b5796399b4038966c4949b5d27fc12ec67c731cc459b183a9230cb7414783df
4. 0x7963b64d89ade872a6a1ce447334547def9b74ba0fc88a2b25fad12d1f7e74f5
5. 0x48be7be92542e2ae8a23162dc31941df80c76c4099e5e4e67b112d1dddd10909
6. 0xea006a5d4cd94e1f629685c4288668c8a4051842f73fdfef061604f56bf2f45d
7. 0x2849e8a6be404129b7288a26ddd8823bedc75752e5e4d5931efa182e2b37f157
8. 0x63839ec1c6d2157e11090343102dac7f2f5ebe935870a6b597cfff693e20f718
9. 0xac936935e59643d4e57abb3bdcf6fb37bcd1763485f00fbb4d033b9fac75bd5a
10. 0xbc2e807bf00b2ed1c806b85b0cbba8abd3b9788e0e8000d164ef64dfc99a3dcb
11. 0xa50fca837a4f035829bddff38d023aff0ec4482f9bb5df60ea5b321b01e3e922
12. 0xf4e3bedc99674db9d8ab4bc7655992ec76f822b327e6c89599b0baa3756fbd19
13. 0x89fcaf55e37dd777228f271b79ea895534a66ec0d184363c2a6eb1b4d23c9ef1
14. 0x216cebb9ae5414599109a02297c4817d7d1c6b1394afeb97efe38e32f0053974
15. 0x7726154b91b2ad65b13849ef6cb6443b1f0ff113a3089c9bd5f2bcfc16be099d
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae