← The evidence ledger
Evidence row 2201923
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://environment-screen.x402tookit.com/pollen-forecast
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 0bf700a80c0e78b13327d1be2173eb3f8d2388188bc4f9de0d0b042636dc3cce
- Leaf
- 0x5125db45dbd4fc53edba81a8de1fddb14fdaf2450d3b79c06045a89597722530
What was observed
{
"endpoints": [
[
"x402",
"https://environment-screen.x402tookit.com/pollen-forecast"
]
],
"name": "Environment Screen",
"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": "Pollen forecast (grass, birch, alder, olive, mugwort, ragweed) in grains/m3. Model covers Europe only; elsewhere null.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"days": 3,
"lat": 48.1351,
"lon": 11.582
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T00:33:16.216Z",
"coverage": "europe-only",
"days": 3,
"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.",
"gridLat": 48.1,
"gridLon": 11.600002,
"notChecked": [
"pollen outside the CAMS Europe domain (the model publishes null there, including the United States)",
"official pollen-count station data",
"…1 more"
],
"reasons": [],
"source": "Open-Meteo Air Quality API (CAMS Europe pollen model)",
"sourceUrl": "https://open-meteo.com/en/docs/air-quality-api",
"species": {
"alder": {
"covered": true,
"meanGrainsPerM3": 0,
"peakAt": "2026-10-21T00:00",
"peakGrainsPerM3": 0
},
"birch": {
"covered": true,
"meanGrainsPerM3": 0,
"peakAt": "2026-10-21T00:00",
"peakGrainsPerM3": 0
},
"grass": {
"covered": true,
"meanGrainsPerM3": 0.02,
"peakAt": "2026-10-21T02:00",
"peakGrainsPerM3": 0.1
},
"mugwort": {
"covered": true,
"meanGrainsPerM3": 0.03,
"peakAt": "2026-10-21T00:00",
"peakGrainsPerM3": 0.1
},
"olive": {
"covered": true,
"meanGrainsPerM3": 0,
"peakAt": "2026-10-21T00:00",
"peakGrainsPerM3": 0
},
"ragweed": {
"covered": true,
"meanGrainsPerM3": 0,
"peakAt": "2026-10-21T00:00",
"peakGrainsPerM3": 0
}
},
"summary": "Highest forecast is grass at 0.1 grains/m3 (2026-10-21T02:00).",
"unit": "grains/m³",
"verdict": "POLLEN_FORECAST"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"days": {
"description": "Forecast days 1 to 5 (default 3)",
"type": "integer"
},
"lat": {
"description": "Latitude (coverage is Europe)",
"type": "number"
},
"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": {
"type": [
"null",
"string"
]
},
"coverage": {
"type": [
"null",
"string"
]
},
"days": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"gridLat": {
"type": [
"null",
"number"
]
},
"gridLon": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"sourceUrl": {
"type": [
"null",
"string"
]
},
"species": {
"properties": {
"alder": {
"properties": {
"covered": {
"type": [
"boolean",
"null"
]
},
"meanGrainsPerM3": {
"type": [
"null",
"number"
]
},
"peakAt": {
"type": [
"null",
"string"
]
},
"peakGrainsPerM3": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"birch": {
"properties": {
"covered": {
"type": [
"boolean",
"null"
]
},
"meanGrainsPerM3": {
"type": [
"null",
"number"
]
},
"peakAt": {
"type": [
"null",
"string"
]
},
"peakGrainsPerM3": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"grass": {
"properties": {
"covered": {
"type": [
"boolean",
"null"
]
},
"meanGrainsPerM3": {
"type": [
"null",
"number"
]
},
"peakAt": {
"type": [
"null",
"string"
]
},
"peakGrainsPerM3": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"mugwort": {
"properties": {
"covered": {
"type": [
"boolean",
"null"
]
},
"meanGrainsPerM3": {
"type": [
"null",
"number"
]
},
"peakAt": {
"type": [
"null",
"string"
]
},
"peakGrainsPerM3": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"olive": {
"properties": {
"covered": {
"type": [
"boolean",
"null"
]
},
"meanGrainsPerM3": {
"type": [
"null",
"number"
]
},
"peakAt": {
"type": [
"null",
"string"
]
},
"peakGrainsPerM3": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"ragweed": {
"properties": {
"covered": {
"type": [
"boolean",
"null"
]
},
"meanGrainsPerM3": {
"type": [
"null",
"number"
]
},
"peakAt": {
"type": [
"null",
"string"
]
},
"peakGrainsPerM3": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
}
},
"type": [
"null",
"object"
]
},
"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": "2026-11-01T22:52:42.948Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-01T22:52:42.678Z"
},
"resource": "https://environment-screen.x402tookit.com/pollen-forecast",
"serviceName": "Environment Screen",
"tags": [
"pollen",
"allergy",
"forecast",
"environment"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Pollen forecast (grass, birch, alder, olive, mugwort, ragweed) in grains/m3. Model covers Europe only; elsewhere null."
}What the leaf hashes
{"body":"0bf700a80c0e78b13327d1be2173eb3f8d2388188bc4f9de0d0b042636dc3cce","id":2201923,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810215434,"prev":null,"subject":"x402_bazaar:https://environment-screen.x402tookit.com/pollen-forecast","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