Evidence row 526868

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://perp-gap-api.perpgap.workers.dev/quote"
    ]
  ],
  "name": "Perp Gap API",
  "owner_address": "0x2d82dcb9cc3a168d9ab25b62c1e33e278a51254f",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0x2d82dcB9cC3a168d9Ab25b62C1E33E278A51254F",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "5MoL8HNnvZUogGrqiF4T1StmAUpdU7ERA2GUJ7gLrEja",
        "scheme": "exact"
      }
    ],
    "description": "Use when an agent needs the best live price for a stock across venues before trading. For 1-10 tickers: perp mark and mid on trade.xyz (Hyperliquid), Aster, Lighter and OKX, xStocks and Ondo token prices per share, last US close, the session reference price, gap % vs it, cross-venue spread, best bid/ask and freshness. Unpaid calls get 402; bad or unknown tickers get 400/404 before any charge. Errors: 400, 402, 404, 502. Data, not advice.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "ticker": "NVDA"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "as_of": "2026-10-22T21:41:01.558Z",
              "last_close": {
                "date": "2026-10-22",
                "price": 212.21,
                "ref_vs_close_pct": 0.316,
                "source": "yahoo"
              },
              "perps": {
                "aster": {
                  "ask": 213.19,
                  "bid": 213.17,
                  "index": 213.1046,
                  "mark": 213.1046,
                  "mid": 213.18,
                  "symbol": "NVDAUSDT"
                },
                "hyperliquid-xyz": {
                  "ask": 212.85,
                  "bid": 212.837,
                  "mark": 212.86,
                  "mid": 212.845,
                  "oracle": 212.89,
                  "symbol": "xyz:NVDA"
                },
                "lighter": {
                  "ask": 212.993,
                  "bid": 212.972,
                  "mark": 212.981,
                  "market_id": 110,
                  "mid": 212.9825,
                  "symbol": "NVDA"
                },
                "okx": {
                  "ask": 213.17,
                  "bid": 213.16,
                  "last": 213.17,
                  "mark": 213.16,
                  "mid": 213.165,
                  "symbol": "NVDA-USDT-SWAP"
                }
              },
              "reference": {
                "age_s": 14,
                "kind": "after-hours_last",
                "price": 212.88,
                "source": "robinhood",
                "ts": 1792705247
              },
              "sources": [
                "hyperliquid"
              ],
              "summary": {
                "best_ask": {
                  "px": 212.85,
                  "venue": "hyperliquid-xyz"
                },
                "best_bid": {
                  "px": 213.17,
                  "venue": "aster"
                },
                "cheapest": "hyperliquid-xyz",
                "consensus_mid": 212.9413,
                "consensus_vs_ref_pct": 0.029,
                "cross_venue_arb_bps": 15,
                "perp_mark_spread_pct": 0.141,
                "richest": "okx",
                "venues_quoted": 6
              },
              "ticker": "NVDA",
              "tokens": {
                "ondo-gm": {
                  "multiplier": 1.0017152487959895,
                  "per_share": 212.9,
                  "price": 213.2652,
                  "status": "postmarket",
                  "symbol": "NVDAon",
                  "underlying_price": 212.837895
                },
                "xstocks-solana": {
                  "liquidity_usd": 2852537,
                  "mint": "Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh",
                  "multiplier": 1.0009180758490996,
                  "per_share": 212.3166,
                  "price": 212.3166,
                  "symbol": "NVDAx"
                }
              },
              "us_session": "after-hours"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "ticker": {
                      "description": "Stock ticker, case-insensitive (free list: GET /catalog).",
                      "examples": [
                        "NVDA"
                      ],
                      "pattern": "^[A-Za-z0-9.]{1,12}$",
                      "type": "string"
                    },
                    "tickers": {
                      "description": "Optional alternative to ticker: up to 10 comma-separated tickers.",
                      "examples": [
                        "NVDA,TSLA"
                      ],
                      "pattern": "^[A-Za-z0-9.,]{1,130}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "ticker"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "description": "Error responses are JSON {error: string, hint?: string}. 400 bad params (never charged); 402 payment required; 404 ticker/market not listed (checked before settlement, never charged); 502 upstream error. Full field docs: /openapi.json.",
                  "properties": {
                    "as_of": {
                      "type": "string"
                    },
                    "last_close": {
                      "type": "object"
                    },
                    "perps": {
                      "type": "object"
                    },
                    "reference": {
                      "type": "object"
                    },
                    "sources": {
                      "type": "array"
                    },
                    "summary": {
                      "type": "object"
                    },
                    "ticker": {
                      "type": "string"
                    },
                    "tokens": {
                      "type": "object"
                    },
                    "us_session": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T10:11:11.77Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-27T10:11:11.405Z"
    },
    "resource": "https://perp-gap-api.perpgap.workers.dev/quote",
    "serviceName": "Perp Gap API",
    "tags": [
      "Trading",
      "Data",
      "stocks",
      "perps",
      "tokenized-stocks"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Use when an agent needs the best live price for a stock across venues before trading. For 1-10 tickers: perp mark and mid on trade.xyz (Hyperliquid), Aster, Lighter and OKX, xStocks and Ondo token prices per share, last US close, the session reference price, gap % vs it, cross-venue spread, best bid/ask and freshness. Unpaid calls get 402; bad or unknown tickers get 400/404 before any charge. Errors: 400, 402, 404, 502. Data, not advice."
}

What the leaf hashes

{"body":"fe7fce895da5e1c2ca08bd34e82ce234881b6db2bdf9b7e50848c50bd0ec3847","id":526868,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124792283963,"prev":451928,"subject":"x402_bazaar:https://perp-gap-api.perpgap.workers.dev/quote","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x67e71d0b08ddc8728a65a4113329210e9a7019365d9330650b97993d3ff5942d
2. 0xe916145ff824650ad12ba079df02cec3e44bf51fda43415e406465b2f80612fa
3. 0x229ed354bd1f25bbff75002b1a4d8150c026856c4c4144a69923ca942df45172
4. 0xaaa0ced329dd28e14a095c2ae6728b377bc910dc6f0a444b38adb7b1f573799d
5. 0xd2146853088515decafd35cd7d6d3af4b54a3a8bd21f6ca299abac58ba841dfd
6. 0x879d5f693f08a7f37b2c9d4e13a3eeb6d061a1b2ab2969c3dcda28c1d4fb6d0c
7. 0xd702f3b617edc20cdc9c691268acdf43a2fa8ad43b08fb8422b4aa77141087ea
8. 0xb37f56ada473a104fff4b5e3f6cfcdca81070858db6b3e85986bfe78015be881
9. 0x7a6f86805ad6e130236b552b8a5997c3d86942be3ff026dac4f2a190fb9deb26
10. 0xe1b6a0c120edc0f0c2cbd8f1aa68f6744ea021014965b2e671812a2fedf53ce9
11. 0x48ff5606b64d91742c8fa41d67fc330937434ce7b5ba57971caf801ce419f684
12. 0xfc80c3ec28002b5abbe969b82c8409cc3216ef75df720eab92db371621f671d9
13. 0x4c257542b0421f909cc313308d9054fb29b4b46d9dca1b83169d04797233fda2
14. 0x3c5462812bd2f841e3d7deefc01555f18262fe5e0d5a7eb155330b7a7cb0388e
15. 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4