Portfolio Stats
Correlation, beta, R-squared and alpha of one return or price series against another you supply. Not advice.
TradingLiveeip155:8453Exactvia cdp
CorrelationBetaRegressionAlpha
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$24.31
Verified settled volume
1,175 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-20 20:46Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb531320805C5BED1D46AEaDcF4F008FDF172DBDaThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
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"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
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"description": "Correlation, beta, R-squared and alpha of one return or price series against another you supply. Not advice.",
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},
"output": {
"asOf": "2026-10-12T00:57:39.306Z",
"beta": 1.401225115,
"source": "computed locally",
"reasons": [
"Pearson correlation = covariance / (sd a * sd b); beta = covariance(a, b) / variance(b), the slope of a regressed on b.",
"Alpha per period = mean(a) - beta * mean(b): the regression intercept, with no risk-free rate subtracted.",
"…1 more"
],
"summary": "Correlation 0.9957842227, beta 1.401225115 of a on b over 6 paired returns (R-squared 0.9915862182).",
"verdict": "STRONG_POSITIVE",
"degraded": false,
"rSquared": 0.9915862182,
"inputKind": "returns",
"lowSample": true,
"covariance": 0.000122,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"whether the two series cover the same dates and frequency: only their order and length are compared",
"stability of beta over time, non-linear relationships and outliers",
"…1 more"
],
"correlation": 0.9957842227,
"observations": 6,
"alphaPerPeriod": -0.0006707503828,
"educationalOnly": "Educational arithmetic on the numbers you supplied. Not investment advice: it does not say what to buy, sell, hold or how much to risk, and a supplied or past series does not predict the future.",
"volatilityAPeriod": 0.01313011805,
"volatilityBPeriod": 0.009330952077,
"alphaAnnualizedSimplePct": -16.90290965
}
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"beta": 1.401225115,
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"Pearson correlation = covariance / (sd a * sd b); beta = covariance(a, b) / variance(b), the slope of a regressed on b.",
"Alpha per period = mean(a) - beta * mean(b): the regression intercept, with no risk-free rate subtracted.",
"…1 more"
],
"summary": "Correlation 0.9957842227, beta 1.401225115 of a on b over 6 paired returns (R-squared 0.9915862182).",
"verdict": "STRONG_POSITIVE",
"degraded": false,
"rSquared": 0.9915862182,
"inputKind": "returns",
"lowSample": true,
"covariance": 0.000122,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"whether the two series cover the same dates and frequency: only their order and length are compared",
"stability of beta over time, non-linear relationships and outliers",
"…1 more"
],
"correlation": 0.9957842227,
"observations": 6,
"alphaPerPeriod": -0.0006707503828,
"educationalOnly": "Educational arithmetic on the numbers you supplied. Not investment advice: it does not say what to buy, sell, hold or how much to risk, and a supplied or past series does not predict the future.",
"volatilityAPeriod": 0.01313011805,
"volatilityBPeriod": 0.009330952077,
"alphaAnnualizedSimplePct": -16.90290965
}
},
"maxAmountRequired": "20000",
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},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
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"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
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}
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"output": {
"asOf": "2026-10-12T00:57:39.306Z",
"beta": 1.401225115,
"source": "computed locally",
"reasons": [
"Pearson correlation = covariance / (sd a * sd b); beta = covariance(a, b) / variance(b), the slope of a regressed on b.",
"Alpha per period = mean(a) - beta * mean(b): the regression intercept, with no risk-free rate subtracted.",
"…1 more"
],
"summary": "Correlation 0.9957842227, beta 1.401225115 of a on b over 6 paired returns (R-squared 0.9915862182).",
"verdict": "STRONG_POSITIVE",
"degraded": false,
"rSquared": 0.9915862182,
"inputKind": "returns",
"lowSample": true,
"covariance": 0.000122,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"whether the two series cover the same dates and frequency: only their order and length are compared",
"stability of beta over time, non-linear relationships and outliers",
"…1 more"
],
"correlation": 0.9957842227,
"observations": 6,
"alphaPerPeriod": -0.0006707503828,
"educationalOnly": "Educational arithmetic on the numbers you supplied. Not investment advice: it does not say what to buy, sell, hold or how much to risk, and a supplied or past series does not predict the future.",
"volatilityAPeriod": 0.01313011805,
"volatilityBPeriod": 0.009330952077,
"alphaAnnualizedSimplePct": -16.90290965
}
},
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
}
],
"x402Version": 1,
"alsoAvailable": {
"llms": "https://portfolio-stats.x402tookit.com/llms.txt",
"catalog": "https://portfolio-stats.x402tookit.com/catalog",
"message": "Portfolio Stats has 10 pay-per-call endpoints (Return, risk and drawdown statistics computed on a price or return series that you supply.), from $0.02 a call. See the full menu and send your agents our way.",
"openapi": "https://portfolio-stats.x402tookit.com/openapi.json",
"related": [
{
"url": "https://portfolio-stats.x402tookit.com/equity-curve",
"path": "/equity-curve",
"what": "Equity-curve summary of a price or return series you supply: CAGR, volatility, Sharpe, dr…",
"price": "$0.02"
},
{
"url": "https://portfolio-stats.x402tookit.com/kelly",
"path": "/kelly",
"what": "Kelly criterion fraction for a stated win probability and payoff, with growth rate and ov…",
"price": "$0.02"
},
{
"url": "https://portfolio-stats.x402tookit.com/max-drawdown",
"path": "/max-drawdown",
"what": "Maximum drawdown of a price or return series you supply, with peak, trough and recovery i…",
"price": "$0.02"
}
]
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0xb531…2DBDa. The signed payment is good for 5 minutes.
- Paid to
- 0xb531…2DBDa
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
20000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- DUPiup…eEm8s
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
20000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb531…2DBDa
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
20000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb531…2DBDa
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"amount": "20000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
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{
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"extra": {
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},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
"network": "eip155:137",
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{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
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"name": "USD Coin",
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},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"a": "[0.012,-0.008,0.02,0.005,-0.015,0.01]",
"b": "[0.01,-0.005,0.015,0.004,-0.01,0.006]",
"kind": "returns"
}
},
"output": {
"type": "json",
"example": {
"asOf": "2026-10-12T00:57:39.306Z",
"beta": 1.401225115,
"source": "computed locally",
"reasons": [
"Pearson correlation = covariance / (sd a * sd b); beta = covariance(a, b) / variance(b), the slope of a regressed on b.",
"Alpha per period = mean(a) - beta * mean(b): the regression intercept, with no risk-free rate subtracted.",
"…1 more"
],
"summary": "Correlation 0.9957842227, beta 1.401225115 of a on b over 6 paired returns (R-squared 0.9915862182).",
"verdict": "STRONG_POSITIVE",
"degraded": false,
"rSquared": 0.9915862182,
"inputKind": "returns",
"lowSample": true,
"covariance": 0.000122,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"whether the two series cover the same dates and frequency: only their order and length are compared",
"stability of beta over time, non-linear relationships and outliers",
"…1 more"
],
"correlation": 0.9957842227,
"observations": 6,
"alphaPerPeriod": -0.0006707503828,
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"volatilityAPeriod": 0.01313011805,
"volatilityBPeriod": 0.009330952077,
"alphaAnnualizedSimplePct": -16.90290965
}
}
},
"schema": {
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"required": [
"input"
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"properties": {
"input": {
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"required": [
"type",
"method"
],
"properties": {
"type": {
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"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"a",
"b"
],
"properties": {
"a": {
"type": "string",
"description": "Asset series, oldest first, JSON like [0.01,-0.02,0.03] or 0.01,-0.02,0.03"
},
"b": {
"type": "string",
"description": "Benchmark series, same length as a"
},
"kind": {
"type": "string",
"description": "returns (default) or prices: what a and b contain"
},
"unit": {
"type": "string",
"description": "decimal (default) or percent; applies when kind is returns"
},
"periodsPerYear": {
"type": "integer",
"description": "Periods per year for annualising alpha (default 252)"
}
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}
},
"additionalProperties": false
},
"output": {
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"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"asOf": {
"type": [
"null",
"string"
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},
"beta": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"reasons": {
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"array",
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],
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}
},
"summary": {
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"verdict": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"rSquared": {
"type": [
"null",
"number"
]
},
"inputKind": {
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"null",
"string"
]
},
"lowSample": {
"type": [
"boolean",
"null"
]
},
"covariance": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"notChecked": {
"type": [
"array",
"null"
],
"items": {
"type": "string"
}
},
"correlation": {
"type": [
"null",
"number"
]
},
"observations": {
"type": [
"null",
"number"
]
},
"alphaPerPeriod": {
"type": [
"null",
"number"
]
},
"educationalOnly": {
"type": [
"null",
"string"
]
},
"volatilityAPeriod": {
"type": [
"null",
"number"
]
},
"volatilityBPeriod": {
"type": [
"null",
"number"
]
},
"alphaAnnualizedSimplePct": {
"type": [
"null",
"number"
]
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-20 20:46Z
- Last indexed by Roundhouse
- 2026-10-22 06:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-21 00:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Portfolio Stats and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Portfolio%20Stats' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://portfolio-stats.x402tookit.com/correlation-beta, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.