{"uid":"cap_QwLLic_pRK3dIzOS58ZPY","slug":"quantaflow-x402-api-gateway-alchemy-ethereum-sepolia-39516e3c","name":"QuantaFlow x402 API Gateway — Alchemy Ethereum 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/alchemy-eth-sepolia","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_jnhss5J-iVUrUULiBeMPe","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 Alchemy's Ethereum Sepolia testnet RPC/API endpoint via x402 micropayment-gated passthrough, charging $0.01 USDC per call","exampleAgentPrompt":"Query the Alchemy Ethereum Sepolia testnet for the latest block number — use the eth_blockNumber RPC method and pay the per-call fee automatically.","exampleUseCases":[{"title":"Check Sepolia wallet ETH balance","prompt":"Look up the ETH balance for wallet address 0xAbC123... on the Ethereum Sepolia testnet right now."},{"title":"Fetch Sepolia transaction receipt","prompt":"Get the transaction receipt for tx hash 0xDef456... on Sepolia testnet so I can confirm it was mined."},{"title":"Retrieve latest Sepolia block details","prompt":"Pull the full details of the most recent block on the Ethereum Sepolia testnet, including all transactions."}],"resultDescription":"The raw upstream response from Alchemy's Ethereum Sepolia API is passed through directly — typically a JSON-RPC response object containing the requested blockchain data (block info, transaction details, account balances, etc.) along with the appropriate content-type header. No transformation is applied.","failureModes":["Payment failure: insufficient USDC balance or invalid x402 payment header returns 402 Payment Required","Invalid path: unrecognized Alchemy API path returns upstream 404 or error","Malformed JSON body: invalid JSON in body field causes upstream RPC error","Alchemy upstream outage: returns 502 or 503 if Alchemy Sepolia node is unavailable","Unsupported RPC method: Alchemy may reject unsupported or disabled JSON-RPC methods with an error response"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call, keyless access to Alchemy's Ethereum Sepolia testnet RPC without managing an Alchemy account or API key — ideal for AI agents that need to make occasional blockchain queries on the Sepolia testnet and want to pay via x402 USDC micropayments rather than maintain API key credentials.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:00:35.903Z","isFirstParty":false}