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Evidence row 121926

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://stall-row-production.up.railway.app/v1/gas-oracle
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
7c84d0ebfb2f9a1b8a9c5db44fa15f53acc73c814be60baf2ee22320f492799c
Leaf
0x9285dcae90030f3594cf13bc31c6c72f25c9f7914ea9dd086e98f090c9c30df7

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://stall-row-production.up.railway.app/v1/gas-oracle"
    ]
  ],
  "name": "stall-row",
  "owner_address": "0x097f9685d1e0752bf8b02d61e5ce9be7ea0fba7f",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x097f9685D1e0752bF8B02d61E5Ce9be7eA0FBA7F",
        "scheme": "exact"
      }
    ],
    "description": "Current Base gas in one call: the live gas price, the current base fee, the base-fee range across the last 20 blocks, whether fees are rising, falling, or flat, and a cheap-window hint drawn from that data. Use this when an agent wants to time a transaction instead of paying whatever the moment charges.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "as_of_epoch": 1761000000,
              "base_fee_gwei": "0.0058",
              "base_fee_max_gwei_20_blocks": "0.0079",
              "base_fee_min_gwei_20_blocks": "0.0051",
              "blocks_sampled": 20,
              "chain": "base",
              "cheapest_window_hint": "Base fee is flat across the last 20 blocks.",
              "gas_price_gwei": "0.0062",
              "latest_block": 22104511,
              "note": "Trend and hint describe the last ~20 blocks only.",
              "trend": "flat"
            },
            "schema": {
              "properties": {
                "as_of_epoch": {
                  "type": "integer"
                },
                "base_fee_gwei": {
                  "type": "string"
                },
                "base_fee_max_gwei_20_blocks": {
                  "type": "string"
                },
                "base_fee_min_gwei_20_blocks": {
                  "type": "string"
                },
                "blocks_sampled": {
                  "type": "integer"
                },
                "chain": {
                  "type": "string"
                },
                "cheapest_window_hint": {
                  "type": "string"
                },
                "gas_price_gwei": {
                  "type": "string"
                },
                "latest_block": {
                  "type": "integer"
                },
                "note": {
                  "type": "string"
                },
                "trend": {
                  "enum": [
                    "rising",
                    "falling",
                    "flat"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "chain",
                "latest_block",
                "gas_price_gwei",
                "base_fee_gwei",
                "trend",
                "cheapest_window_hint"
              ],
              "type": "object"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {},
                  "required": [],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "as_of_epoch": {
                      "type": "integer"
                    },
                    "base_fee_gwei": {
                      "type": "string"
                    },
                    "base_fee_max_gwei_20_blocks": {
                      "type": "string"
                    },
                    "base_fee_min_gwei_20_blocks": {
                      "type": "string"
                    },
                    "blocks_sampled": {
                      "type": "integer"
                    },
                    "chain": {
                      "type": "string"
                    },
                    "cheapest_window_hint": {
                      "type": "string"
                    },
                    "gas_price_gwei": {
                      "type": "string"
                    },
                    "latest_block": {
                      "type": "integer"
                    },
                    "note": {
                      "type": "string"
                    },
                    "trend": {
                      "enum": [
                        "rising",
                        "falling",
                        "flat"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "chain",
                    "latest_block",
                    "gas_price_gwei",
                    "base_fee_gwei",
                    "trend",
                    "cheapest_window_hint"
                  ],
                  "type": "object"
                },
                "schema": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T21:04:18.43Z",
    "quality": {
      "l30DaysTotalCalls": 7,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-25T21:04:18.251Z"
    },
    "resource": "https://stall-row-production.up.railway.app/v1/gas-oracle",
    "serviceName": "stall-row",
    "tags": [
      "base",
      "gas",
      "fees",
      "data",
      "agents"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current Base gas in one call: the live gas price, the current base fee, the base-fee range across the last 20 blocks, whether fees are rising, falling, or flat, and a cheap-window hint drawn from that data. Use this when an agent wants to time a transaction instead of paying whatever the moment charges."
}

What the leaf hashes

{"body":"7c84d0ebfb2f9a1b8a9c5db44fa15f53acc73c814be60baf2ee22320f492799c","id":121926,"kind":"listing","method":"baseline/1","observed_us":1793025620677276,"prev":null,"subject":"x402_bazaar:https://stall-row-production.up.railway.app/v1/gas-oracle","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. 0x9285d0b359d4d060169f77e0ae619288b4869586abb8988ac88e2c608b0497eb
  2. 0xc3068d20a43256505c88eff1a97038819a140742c6b20235897c60df90deaa23
  3. 0x993328d9df1dacb52790ff889f8c610a16d0ed66d46aef8c5100e129fdc713e3
  4. 0xa9605b586dfdc9e9940b4f3d29b51f1a30a3f3380b5358643e1895f2dc2b315a
  5. 0x2199425392577a34bd98abd28da84ac99f06613634abcebd1c2f43fa5aa51bc5
  6. 0x7f117e1272cdbc49824d1330cc7437be5e2e4fa3afa32368a26a2526a74f4ceb
  7. 0xd2018c8acfb5dedfdbf13e1c6ef3736f45553da8ce1bc91274448f44c7c5ea62
  8. 0x9a8f365c9ada4c4fbefc51e28dd0f0b441e3aba3828b296ec0287a6c01fc9eb5
  9. 0x0c136dfcc1f943282b0084289338ad92a791a3ef38b386ba57b7a931b20edfcf
  10. 0x8a45c6c1da5d073416437d0946f0ab55916b463036f2f88da85a39961d6874d8
  11. 0xdcd590752acb338329aec3087ddc69ef4b8fcbe0bb91a9b8e37e17c10a9dfe92
  12. 0x3b55f6d5345bce3e1332e014f19526d25328fb6283d3518837a015c3621c0d1c
  13. 0x45c1d3062bbe98a6b1540c7e2ccf6516eedd6ef07fdfeb1ba77ee6272970447c
  14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
  15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
  16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
  17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON