{"uid":"cap_QYN2WYGqGDkK3XHNB5fVF","slug":"quantaflow-x402-api-gateway-rapid-medium2-cf59348d","name":"QuantaFlow x402 API Gateway - rapid-medium2","description":"Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.","url":"https://quanta-roan.vercel.app/api/service/rapid-medium2?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_MLX13pzJEAkF8u_VnHamU","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 HTTP requests to upstream web3/DeFi tools via the x402 payment protocol, charging $0.01 USDC per call","exampleAgentPrompt":"Forward a POST request to the rapid-medium2 upstream path '/prices' with query params for token 'ETH' and pay the $0.01 USDC x402 fee to get the response back.","exampleUseCases":[{"title":"Fetch live DeFi token price","prompt":"Hit the rapid-medium2 gateway at path '/prices' with a query for ETH and return whatever the upstream DeFi service sends back — it should charge $0.01 USDC automatically."},{"title":"Submit on-chain transaction via proxy","prompt":"Forward a POST to the rapid-medium2 gateway at path '/submit' with this JSON body: {\"txHex\":\"0xabc123\"} so the upstream web3 tool can broadcast it — handle the x402 micropayment automatically."},{"title":"Query DeFi protocol analytics","prompt":"Use the QuantaFlow rapid-medium2 gateway to GET analytics from path '/pools' with query params 'protocol=uniswap&chain=base' — pay the per-call fee and give me the upstream JSON response."}],"resultDescription":"The raw response body and content-type from the upstream web3/DeFi service, passed through transparently after the x402 payment of $0.01 USDC is verified and settled.","failureModes":["Payment verification failure — insufficient USDC balance or malformed x402 payment header returns 402 Payment Required","Invalid upstream path — upstream service returns 404 if the path does not exist","Upstream service unavailable — gateway may return 502 or 503 if the upstream is down","Malformed JSON body — upstream rejects the forwarded body with 400 Bad Request","Query parameter errors — upstream returns validation errors if required params are missing"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call access to a web3 or DeFi upstream API without committing to a subscription, and your agent runtime supports the x402 micropayment protocol for automatic USDC settlement. Prefer it over direct upstream calls when you want metered billing at $0.01 per call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:51:18.724Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-rapid-medium2-cf59348d"}