← The evidence ledger
Evidence row 2201559
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://ml-metrics.x402tookit.com/threshold-sweep
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- e814725f847a234a28263a310b163e787dbf9e2ea5e4a33c9c40c1d1d2ece77d
- Leaf
- 0x614e8b9156086340a8495d41f0363d2803f8a26ac9099202686a824b2960cb0d
What was observed
{
"endpoints": [
[
"x402",
"https://ml-metrics.x402tookit.com/threshold-sweep"
]
],
"name": "Machine Learning Metrics",
"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": "Sweep every score threshold for binary labels and return the best F1, Youden J and accuracy thresholds with their metrics.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"labels": "0,0,1,1",
"scores": "0.1,0.4,0.35,0.8"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T05:49:45.382Z",
"bestAccuracy": {
"accuracy": 0.75,
"f1": 0.666667,
"fn": 1,
"fp": 0,
"precision": 1,
"recall": 0.5,
"specificity": 1,
"threshold": 0.8,
"tn": 2,
"tp": 1,
"youdenJ": 0.5
},
"bestF1": {
"accuracy": 0.75,
"f1": 0.8,
"fn": 0,
"fp": 1,
"precision": 0.666667,
"recall": 1,
"specificity": 0.5,
"threshold": 0.35,
"tn": 1,
"tp": 2,
"youdenJ": 0.5
},
"bestYouden": {
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"f1": 0.666667,
"fn": 1,
"fp": 0,
"precision": 1,
"recall": 0.5,
"specificity": 1,
"threshold": 0.8,
"tn": 2,
"tp": 1,
"youdenJ": 0.5
},
"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.",
"negatives": 2,
"notChecked": [
"costs of false positives versus false negatives (pick the threshold that fits them)",
"overfitting of a threshold chosen on the same data",
"…1 more"
],
"positives": 2,
"reasons": [
"Ties between thresholds resolve to the higher threshold.",
"Youden J ties at thresholds 0.8, 0.35."
],
"source": "computed locally",
"summary": "Best F1 0.8 at threshold 0.35; best Youden J 0.5 at 0.8; best accuracy 0.75 at 0.8.",
"sweep": [
{
"accuracy": 0.75,
"f1": 0.666667,
"fn": 1,
"fp": 0,
"precision": 1,
"recall": 0.5,
"specificity": 1,
"threshold": 0.8,
"tn": 2,
"tp": 1,
"youdenJ": 0.5
},
{
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"f1": 0.5,
"fn": 1,
"fp": 1,
"precision": 0.5,
"recall": 0.5,
"specificity": 0.5,
"threshold": 0.4,
"tn": 1,
"tp": 1,
"youdenJ": 0
}
],
"sweepTruncated": false,
"verdict": "USABLE_THRESHOLD",
"youdenTiedThresholds": [
0.8,
0.35
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"labels": {
"description": "True binary labels 0/1, comma-separated or JSON array, up to 10000 values",
"type": "string"
},
"scores": {
"description": "Model scores (higher = more positive); a sample is predicted positive when score >= threshold",
"type": "string"
}
},
"required": [
"labels",
"scores"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
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"method"
],
"type": "object"
},
"output": {
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]
},
"bestAccuracy": {
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"number"
]
},
"f1": {
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"null",
"number"
]
},
"fn": {
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"null",
"number"
]
},
"fp": {
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]
},
"precision": {
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},
"recall": {
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"number"
]
},
"specificity": {
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"number"
]
},
"threshold": {
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"number"
]
},
"tn": {
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"number"
]
},
"tp": {
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"number"
]
},
"youdenJ": {
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]
}
},
"type": [
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"object"
]
},
"bestF1": {
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},
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},
"recall": {
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]
},
"specificity": {
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]
},
"threshold": {
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"null",
"number"
]
},
"tn": {
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"number"
]
},
"tp": {
"type": [
"null",
"number"
]
},
"youdenJ": {
"type": [
"null",
"number"
]
}
},
"type": [
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"object"
]
},
"bestYouden": {
"properties": {
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]
},
"f1": {
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},
"fn": {
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"threshold": {
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"degraded": {
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},
"disclaimer": {
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},
"negatives": {
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},
"notChecked": {
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},
"positives": {
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]
},
"reasons": {
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},
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},
"source": {
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]
},
"summary": {
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"string"
]
},
"sweep": {
"items": {
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},
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},
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"recall": {
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"threshold": {
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},
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},
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}
},
"type": "object"
},
"type": [
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]
},
"sweepTruncated": {
"type": [
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]
},
"verdict": {
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]
},
"youdenTiedThresholds": {
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},
"type": [
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]
}
},
"type": "object"
},
"type": {
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}
},
"required": [
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],
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}
},
"required": [
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],
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}
}
},
"lastUpdated": "2026-11-01T23:39:01.272Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-01T23:39:01.099Z"
},
"resource": "https://ml-metrics.x402tookit.com/threshold-sweep",
"serviceName": "Machine Learning Metrics",
"tags": [
"machine-learning",
"threshold",
"f1",
"youden",
"classification"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Sweep every score threshold for binary labels and return the best F1, Youden J and accuracy thresholds with their metrics."
}What the leaf hashes
{"body":"e814725f847a234a28263a310b163e787dbf9e2ea5e4a33c9c40c1d1d2ece77d","id":2201559,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646806680034,"prev":null,"subject":"x402_bazaar:https://ml-metrics.x402tookit.com/threshold-sweep","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