{"uid":"cap_pO-Tr5m8R3v0IgxN1R6E7","slug":"carbon-cashmere-beta-to-btc-signal-api-f75977e7","name":"Carbon & Cashmere Beta-to-BTC Signal API","description":"Professional crypto market intelligence. Real-time prices, signals, and market scoring.","url":"https://api.carbon-cashmere.de/v1/beta-to-btc/BTC","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"beta":1.12,"coin":"ETH","_meta":{"disclaimer":"Informational research data only — not investment advice."},"regime":"amplifier","r_squared":0.78,"stability":"stable","rolling_30d":{"std":0.08,"mean":1.11,"current_beta":1.15},"lookback_days":90,"alpha_daily_pct":-0.02}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZnnQZRWVvFETNUf8CMx7D","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the beta coefficient of BTC relative to itself (or a given coin) against BTC, including regime classification, R-squared, alpha, and 30-day rolling statistics.","exampleAgentPrompt":"What's Bitcoin's current beta regime and stability — is it acting as an amplifier or dampener relative to the market, and what does the 30-day rolling beta look like?","exampleUseCases":[{"title":"Bitcoin regime check before trading","prompt":"Before I put on a large BTC position, can you pull the current regime classification for Bitcoin — is it in amplifier or dampener mode right now, and how stable is that signal?"},{"title":"BTC alpha and R-squared analysis","prompt":"What's Bitcoin's daily alpha and R-squared fit looking like today? I want to know how well the beta model is explaining BTC's moves and whether there's any excess return on top of that."},{"title":"Rolling beta trend for Bitcoin","prompt":"Can you grab the 30-day rolling beta stats for BTC — give me the mean, standard deviation, and where the current beta sits relative to that range so I can see if it's trending up or down?"}],"resultDescription":"Returns a JSON object with BTC's beta coefficient, regime label (e.g. 'amplifier'), R-squared fit, daily alpha percentage, stability classification, and 30-day rolling stats (mean, std, current beta) over a 90-day lookback window.","failureModes":["Invalid coin ticker returns error or empty response","Coin not tracked by Carbon & Cashmere returns 404 or null data","Payment not included or insufficient (x402 payment required at $0.01 USDC per call)","API in beta may have intermittent availability","Lookback window insufficient data for some newer coins"],"whenToPreferThis":"Use this endpoint when you need quantitative beta and regime signals for BTC specifically — especially when you want to know how Bitcoin is behaving relative to the broader market (amplifier vs dampener), need R-squared and alpha metrics, or want rolling 30-day beta statistics. Prefer this over generic price APIs when the user wants statistical market characterization rather than just price data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:56:06.795Z","isFirstParty":false}