{"uid":"cap_v5x0xtMSm3FMutOUcUi4f","slug":"api-carbon-cashmere-de-de0c5882","name":"Carbon Cashmere Crypto Correlation Matrix","description":"Professional crypto market intelligence. Real-time prices, signals, and market scoring.","url":"https://api.carbon-cashmere.de/v1/correlation","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"days":30,"coins":["BTC","ETH","SOL"],"pairs":[{"pair":"BTC/ETH","correlation":0.87}],"matrix":[[1,0.87,0.72],[0.87,1,0.81],[0.72,0.81,1]]}},"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":"down","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_knmQ0WADAwXPn_eWuNbea","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":"Computes Pearson correlation matrix for 2–10 crypto assets over a configurable lookback window (7–90 days), returning a full NxN matrix and unique pair list.","exampleAgentPrompt":"Show me the 30-day Pearson correlation matrix for BTC, ETH, SOL, BNB, and AVAX — I want to see which coins move together so I can reduce overlap in my portfolio.","exampleUseCases":null,"resultDescription":"Returns a full NxN Pearson correlation matrix for the requested coins, a flat list of unique pairwise correlations, the list of coins analyzed, and the lookback period used. Values range from -1 (perfect inverse) to +1 (perfect positive correlation).","failureModes":["Fewer than 2 or more than 10 coins specified — request rejected","Coin symbol not among the 116 tracked coins — unknown coin error","Invalid days value not in [7, 14, 30, 60, 90] — enum validation error","Payment not provided or insufficient — 402 Payment Required","Insufficient historical data for the requested window — partial or error response"],"whenToPreferThis":"Use this endpoint when you need quantitative daily-return correlations across multiple crypto assets for portfolio diversification, risk decomposition, or hedging analysis. Prefer this over generic price endpoints when you specifically need the pairwise Pearson correlation structure. Supports up to 10 coins simultaneously across 116 tracked assets with flexible 7–90 day windows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:57:53.011Z","isFirstParty":false}