{"uid":"cap_0y1G-UCe_JUyQV3w5TLfD","slug":"api-web3identity-com-7eefff08","name":"Bitcoin Market Cap & Dominance Metrics","description":"Bitcoin market capitalization and dominance metrics","url":"https://api.web3identity.com/api/bitcoin/marketcap","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"rank":{"type":"number"},"currency":{"type":"string"},"dominance":{"type":"number"},"marketCap":{"type":"number"},"circulatingSupply":{"type":"number"}}}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{}}},"response":{"source":"blockchain.info","currency":"USD","marketCap":1250649441504,"timestamp":"2026-06-11T04:33:02.695Z"}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.010000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.010000/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_2AorHbxjtT0m7kLKL8DWZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns Bitcoin's current market capitalization, dominance percentage, rank, circulating supply, and currency denomination","exampleAgentPrompt":"What's Bitcoin's current market cap and dominance percentage — how much of the total crypto market does BTC control right now?","exampleUseCases":null,"resultDescription":"Returns a JSON object with Bitcoin's rank (number), currency (string), dominance (decimal percentage), marketCap (number in USD), and circulatingSupply (number of BTC)","failureModes":["Upstream data source unavailable — stale or missing market data","Rate limiting or payment failure (402) if x402 payment not provided","Network timeout if external price feed is slow","Invalid or malformed response if provider data feed is down"],"whenToPreferThis":"Use this endpoint when you need Bitcoin-specific market capitalization and dominance metrics rather than general token prices. Ideal for dashboards, portfolio tools, or macro crypto market analysis where BTC dominance and rank are required data points. Prefer this over generic token price endpoints when dominance and circulating supply are needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:48:55.076Z","isFirstParty":false}