{"uid":"cap_SjfB3Elmsyh1LFe4qhhax","slug":"claw402-coinank-coin-market-cap-b3778196","name":"claw402 Coinank Coin Market Cap","description":"Backed by vergex.trade. Pay for any API with USDC. No API keys. No registration. Just a wallet.","url":"https://claw402.ai/api/v1/coinank/coin/market-cap","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"baseCoin":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"code":0,"data":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/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_8f0wiAtdU5y7KSQTOiAcf","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":"Retrieves cryptocurrency market capitalization data for a specified base coin via a pay-per-call x402 USDC payment gateway","exampleAgentPrompt":"What's the current market cap for Bitcoin? Use the coinank market cap endpoint — pay with USDC from my wallet, no API key needed.","exampleUseCases":[{"title":"Ethereum market cap lookup","prompt":"What's the current market capitalization of Ethereum? Pull it from the x402 market cap endpoint and pay with USDC from my wallet — no API key needed."},{"title":"Altcoin ranking and size check","prompt":"I need to know how large Solana's market cap is right now compared to other top coins. Fetch that data using the pay-per-call USDC gateway — no registration required."},{"title":"On-demand crypto portfolio valuation","prompt":"For each of the tokens in my portfolio — BTC, ETH, and SOL — grab their current market cap data. Use the x402 USDC micropayment endpoint so we don't need any API credentials."}],"resultDescription":"A JSON object with a code field (0 for success) and a data array containing market capitalization information for the specified cryptocurrency. The structure is minimal and may include market cap values, rankings, and related coin metrics depending on the baseCoin queried.","failureModes":["Payment not received or insufficient USDC balance — returns 402 Payment Required","Missing or invalid baseCoin query parameter — may return empty data array or error code","Unknown or unsupported coin symbol — returns empty data array","Service downtime from vergex.trade backend — returns 5xx error","Rate limiting or wallet-based throttling — returns 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when you need cryptocurrency market cap data without registering for an API key or managing credentials — ideal for lightweight, on-demand lookups paid per-call with USDC via the x402 protocol. Best suited for agents operating in a crypto-native environment with wallet-based micropayment capability.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:50:08.175Z","isFirstParty":false}