← The evidence ledger
Evidence row 2202123
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://chemistry-calc.x402tookit.com/element-lookup
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 9cbed512ef6ff5f8604d2048366fb4c2f8e62dd57430d8530fea32a1958a6fcd
- Leaf
- 0x42a5e50c3aeff1e0a9e709b2cd567deab7273d07816fb3d6201ec7dc3b9e1a80
What was observed
{
"endpoints": [
[
"x402",
"https://chemistry-calc.x402tookit.com/element-lookup"
]
],
"name": "Chemistry Calculators",
"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": {
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"transactionVersions": [
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
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"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": "Periodic table lookup by symbol, name or atomic number: weight, configuration, electronegativity, melting and boiling points.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"element": "Fe"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T08:45:38.680Z",
"atomicNumber": 26,
"atomicWeight": 55.845,
"atomicWeightBasis": "IUPAC standard atomic weight",
"block": "Transition metal",
"boilingPointC": 2860.85,
"boilingPointK": 3134,
"commonOxidationStates": "+3, +2",
"degraded": false,
"densityGPerCm3": 7.874,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"discovered": "Ancient",
"electronConfiguration": "[Ar]4s2 3d6",
"electronegativityPauling": 1.83,
"meltingPointC": 1537.85,
"meltingPointK": 1811,
"name": "Iron",
"notChecked": [
"isotopes and their abundances",
"temperature or pressure dependence of properties",
"…1 more"
],
"period": 4,
"reasons": [
"IUPAC standard atomic weight",
"Data: PubChem Periodic Table and NIST Atomic Weights and Isotopic Compositions, retrieved 2026-10-11."
],
"source": "computed locally",
"standardState": "Solid",
"summary": "Iron (Fe), Z = 26: atomic weight 55.845, Transition metal, period 4, electronegativity 1.83.",
"symbol": "Fe",
"verdict": "FOUND"
},
"type": "json"
}
},
"schema": {
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},
"atomicWeight": {
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},
"atomicWeightBasis": {
"type": [
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"string"
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},
"block": {
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"string"
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},
"boilingPointC": {
"type": [
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"number"
]
},
"boilingPointK": {
"type": [
"null",
"number"
]
},
"commonOxidationStates": {
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"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"densityGPerCm3": {
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"null",
"number"
]
},
"disclaimer": {
"type": [
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"string"
]
},
"discovered": {
"type": [
"null",
"string"
]
},
"electronConfiguration": {
"type": [
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"string"
]
},
"electronegativityPauling": {
"type": [
"null",
"number"
]
},
"meltingPointC": {
"type": [
"null",
"number"
]
},
"meltingPointK": {
"type": [
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]
},
"name": {
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"string"
]
},
"notChecked": {
"items": {
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},
"type": [
"array",
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},
"period": {
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},
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},
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},
"standardState": {
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]
},
"summary": {
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},
"symbol": {
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"string"
]
},
"verdict": {
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}
},
"type": "object"
},
"type": {
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}
},
"required": [
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}
},
"required": [
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],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:41:25.437Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:41:25.275Z"
},
"resource": "https://chemistry-calc.x402tookit.com/element-lookup",
"serviceName": "Chemistry Calculators",
"tags": [
"chemistry",
"periodic-table",
"element"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Periodic table lookup by symbol, name or atomic number: weight, configuration, electronegativity, melting and boiling points."
}What the leaf hashes
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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