{"uid":"cap_To5W-DU7al5GOuViyS3uh","slug":"quantaflow-coincap-proxy-x402-api-gateway-faccbc22","name":"QuantaFlow CoinCap Proxy - x402 API Gateway","description":"Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.","url":"https://quanta-roan.vercel.app/api/service/coincap?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"body":{"type":"string","description":"Optional JSON body forwarded to POST requests."},"path":{"type":"string","description":"Path below the selected upstream origin."},"query":{"type":"object"},"method":{"enum":["GET","POST"],"type":"string"}}},"responseSchema":{"description":"The upstream response body and content type are passed through after successful payment."},"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":"$0.01/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_32UAUTFC5lAqRyx2ycARs","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":"Proxies requests to the CoinCap cryptocurrency data API via the x402 micropayment protocol, charging $0.01 USDC per call","exampleAgentPrompt":"Pull the current price and 24-hour volume for Bitcoin from CoinCap — I want the latest market data including market cap and percent change.","exampleUseCases":[{"title":"Real-time crypto portfolio valuation","prompt":"Get me the current prices for Bitcoin, Ethereum, and Solana from CoinCap so I can update my portfolio's total value."},{"title":"DeFi arbitrage price monitoring","prompt":"Fetch the latest price and volume data for the top 10 cryptocurrencies by market cap from CoinCap — I need to check for arbitrage opportunities."},{"title":"Crypto market research snapshot","prompt":"Pull the full asset details for Chainlink from CoinCap, including its current price, market cap rank, and 24-hour percent change."}],"resultDescription":"The raw upstream CoinCap API response, passed through as-is after successful x402 micropayment — typically JSON containing cryptocurrency asset data such as price in USD, market cap, volume, supply, and percent change fields.","failureModes":["Payment failure: insufficient USDC balance or x402 payment header rejected — returns 402 Payment Required","Invalid path: unrecognized CoinCap API path returns 404 or upstream error","Malformed query parameters: upstream CoinCap returns 400 bad request","CoinCap upstream outage: gateway may return 502 or 503","Rate limiting from upstream CoinCap API: may return 429"],"whenToPreferThis":"Choose this endpoint when you need real-time or historical cryptocurrency market data from CoinCap and are operating in a web3/DeFi agent context where paying per-call via x402 USDC micropayments is acceptable. Prefer this over direct CoinCap API access when you want a pay-as-you-go model without managing API keys, or when building autonomous agents that need programmable crypto payments.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:49:28.606Z","isFirstParty":false,"canonicalSlug":"quantaflow-coincap-proxy-x402-api-gateway-faccbc22"}