← The evidence ledger
Evidence row 2201617
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://marine-conditions.x402tookit.com/nearest-tide-station
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b36532690fda562c5321257895615b4d721c71f7fdd538e5ba964645b7be5367
- Leaf
- 0xc8ebcd904f7d60be83b93bac41351e64d19bb0ada9731c115dff5cb9a4ab1afd
What was observed
{
"endpoints": [
[
"x402",
"https://marine-conditions.x402tookit.com/nearest-tide-station"
]
],
"name": "Marine Conditions",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "The nearest NOAA tide-prediction stations to a latitude and longitude, with distance in km and miles.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"lat": 40.65,
"limit": 3,
"lon": -74
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T01:09:37.723Z",
"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.",
"lat": 40.65,
"lon": -74,
"notChecked": [
"whether the station is across a barrier or in a different water body",
"tide-time differences between the station and your spot (offsets apply for subordinate stations)",
"…1 more"
],
"reasons": [
"Within 100 km."
],
"source": "NOAA CO-OPS",
"sourceUrl": "https://tidesandcurrents.noaa.gov",
"stations": [
{
"distanceKm": 2,
"distanceMiles": 1.2,
"latitude": 40.665,
"longitude": -74.0133,
"name": "Gowanus Bay",
"state": "NY",
"station": "8517921"
},
{
"distanceKm": 5.5,
"distanceMiles": 3.4,
"latitude": 40.6083,
"longitude": -74.035,
"name": "Fort Hamilton, The Narrows",
"state": "NY",
"station": "8517942"
}
],
"stationsConsidered": 3502,
"summary": "Nearest: Gowanus Bay, NY (8517921), 2 km away.",
"verdict": "FOUND"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
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],
"type": "string"
},
"queryParams": {
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"type": "number"
},
"limit": {
"description": "How many, 1 to 10 (default 3)",
"type": "integer"
},
"lon": {
"description": "Longitude",
"type": "number"
}
},
"required": [
"lat",
"lon"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
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"null",
"string"
]
},
"degraded": {
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"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"lat": {
"type": [
"null",
"number"
]
},
"lon": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"sourceUrl": {
"type": [
"null",
"string"
]
},
"stations": {
"items": {
"properties": {
"distanceKm": {
"type": [
"null",
"number"
]
},
"distanceMiles": {
"type": [
"null",
"number"
]
},
"latitude": {
"type": [
"null",
"number"
]
},
"longitude": {
"type": [
"null",
"number"
]
},
"name": {
"type": [
"null",
"string"
]
},
"state": {
"type": [
"null",
"string"
]
},
"station": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"stationsConsidered": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:36:09.78Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:36:09.597Z"
},
"resource": "https://marine-conditions.x402tookit.com/nearest-tide-station",
"serviceName": "Marine Conditions",
"tags": [
"tides",
"noaa",
"nearest",
"station"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "The nearest NOAA tide-prediction stations to a latitude and longitude, with distance in km and miles."
}What the leaf hashes
{"body":"b36532690fda562c5321257895615b4d721c71f7fdd538e5ba964645b7be5367","id":2201617,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646806913111,"prev":null,"subject":"x402_bazaar:https://marine-conditions.x402tookit.com/nearest-tide-station","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).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af