← The evidence ledger
Evidence row 2201613
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://marine-conditions.x402tookit.com/water-level-now
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b8e67bdb83ffc5c046f3006e0e2a77d4b105a24926deff507326d42bac200e6b
- Leaf
- 0x7164ed061f20efdcedc1a850ed8992e39ff9d1f2a31bba753f9bbcba85e94f23
What was observed
{
"endpoints": [
[
"x402",
"https://marine-conditions.x402tookit.com/water-level-now"
]
],
"name": "Marine Conditions",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "30000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Latest observed water level at a NOAA station against its tide prediction: the difference shows surge or blow-out in feet.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"station": "8518750"
},
"type": "http"
},
"output": {
"example": {
"ageMinutes": 10,
"anomalyFt": 0.87,
"asOf": "2026-10-12T01:09:51.277Z",
"datum": "MLLW",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"name": "The Battery",
"notChecked": [
"flood stage (CO-OPS flood thresholds are not used because the API does not state their datum)",
"forecast surge",
"…2 more"
],
"observedAtUtc": "2026-10-12 01:00",
"observedFt": 5.85,
"predictedFt": 4.98,
"preliminary": true,
"qualityFlags": [
1,
0
],
"reasons": [
"Close to the astronomical prediction.",
"Data are preliminary (not yet quality-controlled by NOAA).",
"…1 more"
],
"sigma": 0.128,
"source": "NOAA CO-OPS",
"sourceUrl": "https://tidesandcurrents.noaa.gov",
"station": "8518750",
"summary": "The Battery: 5.85 ft above MLLW at 2026-10-12 01:00 UTC, predicted 4.98 ft, +0.87 ft above prediction.",
"unit": "feet",
"verdict": "NEAR_PREDICTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"station": {
"description": "7-digit CO-OPS station id, e.g. 8518750",
"type": "string"
}
},
"required": [
"station"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"ageMinutes": {
"type": [
"null",
"number"
]
},
"anomalyFt": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"datum": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"observedAtUtc": {
"type": [
"null",
"string"
]
},
"observedFt": {
"type": [
"null",
"number"
]
},
"predictedFt": {
"type": [
"null",
"number"
]
},
"preliminary": {
"type": [
"boolean",
"null"
]
},
"qualityFlags": {
"items": {
"type": "number"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"sigma": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"sourceUrl": {
"type": [
"null",
"string"
]
},
"station": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"unit": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:36:20.959Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:36:20.778Z"
},
"resource": "https://marine-conditions.x402tookit.com/water-level-now",
"serviceName": "Marine Conditions",
"tags": [
"water-level",
"storm-surge",
"noaa",
"marine"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Latest observed water level at a NOAA station against its tide prediction: the difference shows surge or blow-out in feet."
}What the leaf hashes
{"body":"b8e67bdb83ffc5c046f3006e0e2a77d4b105a24926deff507326d42bac200e6b","id":2201613,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646806901101,"prev":null,"subject":"x402_bazaar:https://marine-conditions.x402tookit.com/water-level-now","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0x7165380e94cf00ff413b3e7537914e9d83bbc8d2c0c0e58688eda3b6d7e2a02f
- 0xa14c52bd50a78a05a8d17cf6bde2f6f726533a86c8d380a2f86ea4132d749d5b
- 0x00bc5acede9468ddca15458ee7ab86898708552c7b3dd107df3e49dfafeff2df
- 0x0ed4000d28b16ac64e0cc4b0500722c5c670859665f62f8b17218027033bffe2
- 0x9afaa1e785ec70727a27afab919e518b613ab3345042d74d0752ef29bec40941
- 0x88641bf76b8185e3d466df231ddccedf4b125d2038f16ae6a52bfa7e6e50d805
- 0x183d32e3720181f992c01039f5dbe65ed0654112a03d8f9cabaa038bd71be8d7
- 0xa5344edc4dcb0761ca64b258525baeaed8e387c85332fcf76361a86af896b696
- 0xcafacefe99f3ee59bde93413605accd5a675a2b2ce7125e143f8d2545c1b2ff7
- 0x5a943e0c36afffde14120265ca7ddc8fe4fb4638056f1896b2c298c718bcacc1
- 0xd50e5599c9facbec567be13b1c90ccea10feb33fd958ff11819cc8b96c3f6283
- 0x8b50ca6f83f92f047eee3f24720b579f3fc640c6f076688895cd4ff049787414
- 0x5b336d18729d4068a892dd1e69a1bcd181b14c9ee7673f058f47ad6722014ff9
- 0x05ad6b5d39c05b20c421cfd08a369494609a679562a35de106ddfc5164e8f853
- 0x60dd7fd8117cbf3b80707f722623736c8c2b5b56277e8e78c9f81ef2dab8deab
- 0x3b89dd05634a82075204d3c671f613081ddfd9df739c64c0a8f39081bdfa32c7
- 0x1805ef693fbdb2c23fcb61616f830408ca89bec1dc5b68ee47a770ffc0b9760a
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af