{"uid":"cap_w24ozeReiNDg4l9U7PZp4","slug":"quantaflow-x402-api-gateway-infura-sepolia-98dbb6dc","name":"QuantaFlow x402 API Gateway – Infura Sepolia","description":"Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.","url":"https://quanta-roan.vercel.app/api/service/infura-sepolia?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_c_XCfcKQ52GHHHSkGkaf0","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 Infura Sepolia (Ethereum testnet) JSON-RPC endpoint via the x402 micropayment protocol, charging $0.01 USDC per call.","exampleAgentPrompt":"Call the Sepolia testnet RPC using the QuantaFlow gateway and get the current block number — use eth_blockNumber with an empty params array and pay the $0.01 USDC fee per request.","exampleUseCases":[{"title":"Check Sepolia account balance","prompt":"Use the QuantaFlow Infura Sepolia gateway to run eth_getBalance for address 0xAbC123... on the latest block — I need to verify my test wallet has funds before running a script."},{"title":"Broadcast transaction to Sepolia","prompt":"Forward a signed raw transaction to the Sepolia testnet via the QuantaFlow gateway using eth_sendRawTransaction — here's the signed hex payload: 0xf86c..."},{"title":"Query Sepolia smart contract state","prompt":"I need to call eth_call on my Sepolia contract at 0xDef456... with this calldata to read its current state — route it through the QuantaFlow Infura Sepolia endpoint and pay the micropayment fee."}],"resultDescription":"The raw upstream Infura Sepolia JSON-RPC response body is passed through verbatim, including result fields such as block numbers, balances, transaction receipts, or error objects, along with the original content type.","failureModes":["Insufficient USDC balance or failed x402 payment returns 402 Payment Required","Invalid JSON-RPC method or malformed body returns upstream Infura error (e.g. -32600 Invalid Request)","Incorrect path routing results in 404 or upstream rejection","Sepolia node unavailability causes 503 or timeout","Rate limiting by upstream Infura returns 429"],"whenToPreferThis":"Choose this endpoint when you need pay-per-use access to Infura's Sepolia Ethereum testnet RPC without managing your own Infura API key or subscription, and you are operating in a web3/x402 micropayment context where per-call USDC billing is acceptable. Ideal for agents that make sporadic testnet calls and want to avoid credential management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T18:50:56.990Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-infura-sepolia-98dbb6dc"}