{"uid":"cap_FhnenaDClTI7tAs8lVLmv","slug":"api-carbon-cashmere-de-54f8fe7a","name":"Carbon Cashmere Beta-to-BTC Regression API","description":"Beta coefficient of coin vs BTC via OLS regression on 4h returns + rolling 30d stability analysis. Returns full-period beta, alpha (daily pct), r-squared, regime classification (high_amplifier/amplifier/coupled/partial_coupled/decoupled/inverted), and rolling 30d stats (mean/std/min/max). Stability rating (stable/moderate/unstable) based on coefficient-of-variation. Informational research data — not investment advice.","url":"https://api.carbon-cashmere.de/v1/beta-to-btc/:coin","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_dT2TkmDwFCuDi2gSN95kP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates a cryptocurrency's beta coefficient versus Bitcoin using OLS regression on 4-hour returns with rolling 30-day stability analysis, regime classification, and alpha/R-squared metrics.","exampleAgentPrompt":"What's SOL's beta to Bitcoin right now — is it an amplifier or decoupled, and how stable has the beta been over the last 30 days?","exampleUseCases":null,"resultDescription":"Returns full-period beta coefficient, daily alpha percentage, R-squared fit, a regime label (one of: high_amplifier/amplifier/coupled/partial_coupled/decoupled/inverted), and rolling 30-day statistics (mean, std, min, max beta) plus a stability rating (stable/moderate/unstable) based on coefficient of variation.","failureModes":["Unsupported coin ticker returns a 400/422 validation error — only 34 enumerated coins are supported","Network or upstream data outage may return a 500 or timeout","Payment failure (x402) if USDC balance is insufficient for the $0.01 per-call fee","BTC queried against itself may return trivial beta=1 results"],"whenToPreferThis":"Use this endpoint when you need a quantitative, regression-based measure of how a specific altcoin moves relative to Bitcoin — particularly when regime classification (amplifier vs decoupled) and rolling stability analysis matter. Prefer this over simple correlation endpoints when you need alpha, R-squared, and 30-day rolling coefficient-of-variation for research or portfolio risk profiling.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:58:04.426Z","isFirstParty":false}