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Evidence row 120499

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/predictions/kalshi/KXPRESNOMD-28
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
6b2dba2d6bb78cc79c1d13ecfd645315dc284553efd8e9c004277f2edfb8648f
Leaf
0x4f9c8eb3a5f28860678eda9093220d0997061b55194a7ad760d221c1d732ce6c

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/predictions/kalshi/KXPRESNOMD-28"
    ]
  ],
  "name": "Saylor Innovations Prediction Ma",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:predictions:event:kalshi/",
          "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:predictions:event:kalshi/",
          "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:predictions:event:kalshi/",
          "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:predictions:event:kalshi/",
          "reference": "ABf2yNibFg9SHNQ2tmEGx1QZzhYG6brwamEGuh9ZgBKt",
          "session": "eyJhcnRpY2xlSWQiOiJwcmVkaWN0aW9uczpldmVudDprYWxzaGkva3hwcmVzbm9tZC0yOCIsInJlZmVyZW5jZSI6IkFCZjJ5TmliRmc5U0hOUTJ0bUVHeDFRWnpoWUc2YnJ3YW1FR3VoOVpnQkt0IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1MDc5NjcwNTh9.d00hWvwXrK32cQ8wnAzPgfxr5iTnN_H69dvO00tht0k"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "memo": "saylor:predictions:event:kalshi/",
          "reference": "HYnt2HU62j9vjqahkKmxmJZdVYBhJGPjdXGBpm3HtbfG",
          "session": "eyJhcnRpY2xlSWQiOiJwcmVkaWN0aW9uczpldmVudDprYWxzaGkva3hwcmVzbm9tZC0yOCIsInJlZmVyZW5jZSI6IkhZbnQySFU2Mmo5dmpxYWhrS214bUpaZFZZQmhKR1BqZFhHQnBtM0h0YmZHIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1MDc5NjcwNTh9.FHp3Di_qnT6b-2cDojG3_UQfUyW0_QTRsG0Yvh2wBjw"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "90434",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:predictions:event:kalshi/",
          "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": "93231",
          "reference": "GA3ZATZMDPTEoeAonyHjTuaJM4CtxiwxxX25vfoqMshq",
          "session": "eyJhcnRpY2xlSWQiOiJwcmVkaWN0aW9uczpldmVudDprYWxzaGkva3hwcmVzbm9tZC0yOCIsInJlZmVyZW5jZSI6IkdBM1pBVFpNRFBURW9lQW9ueUhqVHVhSk00Q3R4aXd4eFgyNXZmb3FNc2hxIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkwNDM0LCJleHAiOjE3OTI1MDc5NjcwNTh9.rWToH_Cn1baZHyEA3oGFXRI_moEeJkvuAG9VBVUoGxk",
          "solUsdPrice": 107.26
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "All markets in a Polymarket or Kalshi event - implied probabilities, bid/ask, volume and close time",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "category": null,
              "closes_at": "2026-09-30T23:59:00Z",
              "id": "what-price-will-bitcoin-hit-in-september-2026",
              "markets": [
                {
                  "best_ask": 0.08,
                  "best_bid": 0.06,
                  "liquidity_usd": 45000,
                  "outcomes": [
                    {
                      "name": "Yes",
                      "probability": 0.07
                    },
                    {
                      "name": "No",
                      "probability": 0.93
                    }
                  ],
                  "question": "Will Bitcoin reach $100,000 in September?",
                  "volume_24h_usd": 120000
                }
              ],
              "platform": "polymarket",
              "title": "What price will Bitcoin hit in September?",
              "url": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
              "volume_24h_usd": 891236
            },
            "type": "json"
          }
        },
        "schema": {
          "$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": {
                    "category": {
                      "description": "Category"
                    },
                    "closes_at": {
                      "description": "Time the market closes",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "market_count": {
                      "description": "Number of market",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "markets": {
                      "description": "Markets",
                      "items": {
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "note": {
                      "description": "Caveat or context for reading the result",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "platform": {
                      "description": "Platform name",
                      "type": "string"
                    },
                    "title": {
                      "description": "Title",
                      "type": "string"
                    },
                    "url": {
                      "description": "Canonical URL",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "volume_24h_contracts": {
                      "description": "Volume 24h contracts",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "volume_24h_usd": {
                      "description": "Trading volume over the last 24 hours in US dollars",
                      "type": [
                        "number",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "platform",
                    "id",
                    "markets"
                  ],
                  "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": "2026-10-20T14:50:47.106Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-20T14:50:46.865Z"
    },
    "resource": "https://saylorinnovations.com/api/predictions/kalshi/KXPRESNOMD-28",
    "serviceName": "Saylor Innovations Prediction Ma",
    "tags": [
      "prediction-markets",
      "polymarket",
      "kalshi",
      "event"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "All markets in a Polymarket or Kalshi event - implied probabilities, bid/ask, volume and close time"
}

What the leaf hashes

{"body":"6b2dba2d6bb78cc79c1d13ecfd645315dc284553efd8e9c004277f2edfb8648f","id":120499,"kind":"listing","method":"baseline/1","observed_us":1793025618153434,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/predictions/kalshi/KXPRESNOMD-28","subject_kind":"source_record"}

Proof

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

  1. 0x4f9c886e87bed4c7536dc0cd97ae89967a9a3694d49710c2514a4fa886fd7951
  2. 0x241e2c2c203210162cbb9aac944de6e6ecf307ac8e85c2150797c0166c3d4742
  3. 0xb378f7498bb558d77382601a31bac370c58ad55768b9809a84f0c76deec231aa
  4. 0x4215d65ad669bfdef50b8c8a76cd4829913eba40339eaa4e168708d26c0507cc
  5. 0xe37faffd63f96d5891c49896513e950196acbc57bd31737f1a5732a8d0bce138
  6. 0x479b55ad8c1193bd8feba7146d0b8e2a06e1ee1db1bdffcc3d61b7095d61ac9e
  7. 0x7ec5e34cf3ebadeaeb626e847d9b9c629a4cdbf95aff3fe5889a240ec2397b69
  8. 0xa6ea5cb7dcd6f45f245d4564a85e54a9db7b67fe93b298769f74e78f4e48e384
  9. 0xe0858e13f7d13be5088a2b51de3454ad3bfad9f4f1ad79c601968ed9ff018a23
  10. 0xca526104943205d387b1db76bc252dbbefc5b0a9f5a9e4bd56958a2820d48ee1
  11. 0x72d408a0419640ce55a8ca5f9c16e8da5334b5f106300a379634eb22bded71e1
  12. 0xaf14a84837a57dc5a0cb0ebd158daaad24c19301b9257d9e97c322a7d8c54bc0
  13. 0xf7d2cf278e5d2768b8bdb70730c378877cf7165d8efcbec8bcd3282fdc50d177
  14. 0x0733993143f0230e79482cef2c38e95d98f9eafbe64a43cdc74a4545938a4167
  15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
  16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
  17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
  18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON