← The evidence ledger
Evidence row 2201581
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://math-stats.x402tookit.com/correlation
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 60232ed8316a2081195580c7f243f8df22f37255f2cc3f3758a0446d82cb2122
- Leaf
- 0xafdaa9c2888ab2a6e7e1eaf49e2d5802fa6af9478e84b5c73ee4bc23387190fc
What was observed
{
"endpoints": [
[
"x402",
"https://math-stats.x402tookit.com/correlation"
]
],
"name": "Math and Statistics",
"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
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},
"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": "Pearson and Spearman correlation of two lists with p-values, plus the least-squares line, R squared and an optional prediction.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"predictAt": 6,
"x": "1,2,3,4,5",
"y": "2,4,5,4,5"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T06:26:06.329Z",
"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.",
"intercept": 2.2,
"meanX": 3,
"meanY": 4,
"n": 5,
"notChecked": [
"causation (correlation never shows cause)",
"non-linear relationships (a correlation near 0 can hide a strong curve)",
"…2 more"
],
"pearsonP": 0.12402706,
"pearsonR": 0.774596669241,
"prediction": {
"extrapolating": true,
"x": 6,
"y": 5.8
},
"rSquared": 0.6,
"reasons": [
"Strength bands (0.2, 0.4, 0.6, 0.8) are a common convention, not a law.",
"Correlation does not show cause.",
"…1 more"
],
"residualStandardError": 0.894427191,
"slope": 0.6,
"source": "computed locally",
"spearmanP": 0.15461852,
"spearmanRho": 0.737864787373,
"summary": "n=5: Pearson r = 0.7746 (strong positive, p = 0.124), Spearman rho = 0.7379; y = 0.6x + 2.2, R squared 0.6; at x = 6, y is about 5.8.",
"verdict": "STRONG_POSITIVE"
},
"type": "json"
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},
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},
"intercept": {
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]
},
"meanX": {
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},
"meanY": {
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]
},
"n": {
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"number"
]
},
"notChecked": {
"items": {
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},
"type": [
"array",
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]
},
"pearsonP": {
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"number"
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},
"pearsonR": {
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},
"prediction": {
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},
"y": {
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}
},
"type": [
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},
"rSquared": {
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},
"reasons": {
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},
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},
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},
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},
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},
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},
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}
},
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},
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},
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}
},
"lastUpdated": "2026-11-01T23:37:56.833Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:37:56.681Z"
},
"resource": "https://math-stats.x402tookit.com/correlation",
"serviceName": "Math and Statistics",
"tags": [
"statistics",
"correlation",
"regression"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Pearson and Spearman correlation of two lists with p-values, plus the least-squares line, R squared and an optional prediction."
}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