{"uid":"cap_ktlT23jsLPhcrvWgEZqmO","slug":"quantaflow-x402-api-gateway-infura-base-sepolia-9d072b88","name":"QuantaFlow x402 API Gateway – Infura Base 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-base-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_ftD8OJbWCGfnwtqJM4BPw","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 Base Sepolia RPC endpoint via x402 micropayment-gated API gateway, enabling pay-per-call access to the Base Sepolia testnet blockchain.","exampleAgentPrompt":"Call eth_blockNumber on the Base Sepolia testnet through Infura and tell me the latest block height — use the QuantaFlow pay-per-call gateway so I don't need to manage an Infura API key.","exampleUseCases":[{"title":"Check testnet account balance","prompt":"Look up the ETH balance for address 0xAbC1234...on the Base Sepolia testnet using the Infura RPC gateway."},{"title":"Fetch latest Base Sepolia block","prompt":"Get the latest block number and timestamp from the Base Sepolia testnet via Infura right now."},{"title":"Read smart contract state on testnet","prompt":"Call the read-only balanceOf function on my ERC-20 contract at 0xDef5678... on Base Sepolia testnet and return the result."}],"resultDescription":"The raw upstream Infura Base Sepolia JSON-RPC response body is passed through after the x402 micropayment ($0.01 USDC) is processed, including standard Ethereum JSON-RPC fields like result, id, and jsonrpc version.","failureModes":["Payment failure: insufficient USDC balance causes 402 Payment Required before request is forwarded","Invalid RPC method: Infura returns JSON-RPC error if the method or params are malformed","Network unavailable: Infura Base Sepolia node downtime returns upstream 5xx error","Invalid path: unrecognized path below the upstream origin returns 404 or routing error","Malformed JSON body: upstream rejects non-JSON or structurally invalid request bodies"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call access to the Infura Base Sepolia Ethereum testnet RPC without provisioning your own Infura API key or managing subscriptions. Ideal for AI agents testing DeFi workflows, reading smart contract state, or querying testnet data on a per-request basis using x402 USDC micropayments on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T12:36:11.999Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-infura-base-sepolia-9d072b88"}