Evidence row 120086

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/cors-error-debugging"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:cors-error-debugging",
          "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:cors-error-debugging",
          "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:cors-error-debugging",
          "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": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "memo": "saylor:cors-error-debugging",
          "reference": "DLeWb5z88AM6RJZ93HzFnNe9zicraUseYFbSMFwCA749",
          "session": "eyJhcnRpY2xlSWQiOiJjb3JzLWVycm9yLWRlYnVnZ2luZyIsInJlZmVyZW5jZSI6IkRMZVdiNXo4OEFNNlJKWjkzSHpGbk5lOXppY3JhVXNlWUZiU01Gd0NBNzQ5IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3Nzk3Nzk1NDR9.bZoxn-277IgkOeRWVknCQkmzekT8jnfjhSTYfkZ8P-A"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "memo": "saylor:cors-error-debugging",
          "reference": "83WAgaP74UV2h97FhXcz3vc2DLGLycNLXu1UZxmd9rSs",
          "session": "eyJhcnRpY2xlSWQiOiJjb3JzLWVycm9yLWRlYnVnZ2luZyIsInJlZmVyZW5jZSI6IjgzV0FnYVA3NFVWMmg5N0ZoWGN6M3ZjMkRMR0x5Y05MWHUxVVp4bWQ5clNzIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3Nzk3Nzk1NDR9.PNdXke8xkpB8f_5xleqKiZ8qj38fv8koDd6cBLUZwVw"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "92991",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:cors-error-debugging",
          "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": "95868",
          "reference": "tyPYGbbE3Jfu51eJYtv6AHGtvBaxT96oFCQWHz1MCd1",
          "session": "eyJhcnRpY2xlSWQiOiJjb3JzLWVycm9yLWRlYnVnZ2luZyIsInJlZmVyZW5jZSI6InR5UFlHYmJFM0pmdTUxZUpZdHY2QUhHdHZCYXhUOTZvRkNRV0h6MU1DZDEiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTI5OTEsImV4cCI6MTc5Mjc3OTc3OTU0NX0.SHKN8vseP0sm1C4icHrTNPvv3rDE-RC3J9FGIjKrcnY",
          "solUsdPrice": 104.31
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Fix browser CORS errors - preflight OPTIONS, Allow-Origin, Allow-Headers, credentials and the common server-side mistakes",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "What CORS is and is not, how to read the console error, simple versus preflighted requests, the headers a server must return (Allow-Origin, Methods, Headers, Credentials), common mistakes with wildcards, redirects and proxies, and when a dev proxy is the right fix.",
              "c": "Web & Domains",
              "id": "cors-error-debugging",
              "t": "Fix Browser CORS Errors Step by Step"
            },
            "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/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-23T18:20:59.594Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T18:20:59.332Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/cors-error-debugging",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "cors",
      "http",
      "browser",
      "headers",
      "api"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Fix browser CORS errors - preflight OPTIONS, Allow-Origin, Allow-Headers, credentials and the common server-side mistakes"
}

What the leaf hashes

{"body":"203a7ecebd06716c046e1dc2a45965ea3a3a6dabc56c4e216a0172c440e073c9","id":120086,"kind":"listing","method":"baseline/1","observed_us":1793025617212352,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/cors-error-debugging","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. 0x835e9d88606f38c33150c64ff1f176cd57ef642c7dcf4edbf6cdc3df03434d6f
2. 0x94127def8bcfd202442ac7f24419346e0209d09c5b19964fc5990f934b084cce
3. 0x7a376cd175f99819a60b793191fa4b61752b0871ccd265871087bf8a8197721b
4. 0x0bbf70899ed2c4060c0ba5a3db7d0ed42842c747a7caa7b55280521a7137787f
5. 0x63c47fcaad15d5f84ed43a8995e19f25679a6e3481b23d42a5dd0b34314ebd20
6. 0xe0097e3057275dd864dd5958bd4b0b7e5a345e15eef3993920fb8135e1e5dcc0
7. 0xae4c04600a16d685f311571dc87a4eaa45bb76dfbc972b218716b1ae494cf0d1
8. 0x0c956b56b67a2f6ee253a125c8befd25d03ed725633c099bd01bbb3611410759
9. 0x212fce385692a7e479fada14ca475661d36f018549f103ff78efdf45e039ae84
10. 0xee19b1ec06299bfa7d1996bbbc62f4c302304457b0e425812bc2df6d4ce7c782
11. 0x6e037384448a2bbd201b4e7e9e6e447d7254d0d2926b3fd2e81fdf99eae4a06b
12. 0xfdaa032291ded0df2cf35d6e9dc6e7a2643d0fe027dd3ab321971f1f7bf69147
13. 0x91c2ae93ec20c7fed5088112fe3941ca622dfb3f8f1022c4844726c361244bd4
14. 0x0eff463856b0992d53ab7d8c0b97c71541413358bdd445710c1e4b6aeb4d8f78
15. 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae