{"uid":"cap_TnXfMl0z5bwzwB6V8N7Jf","slug":"quantaflow-x402-api-gateway-alchemy-arbitrum-mainnet-e8003143","name":"QuantaFlow x402 API Gateway — Alchemy Arbitrum Mainnet","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-arb-mainnet?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_CVIvPAKpQ3PHU9oNU9ooG","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 Arbitrum mainnet RPC/API endpoint via the x402 micropayment protocol, charging $0.01 USDC per call","exampleAgentPrompt":"Using the Alchemy Arbitrum mainnet gateway, fetch the latest block number — route the GET request to /v2/{apiKey} with no body.","exampleUseCases":[{"title":"Check Arbitrum token balance","prompt":"Query the Alchemy Arbitrum mainnet gateway to get the USDC token balance for wallet address 0xAbC...123 — send an eth_call to the ERC-20 balanceOf method on the USDC contract."},{"title":"Fetch recent Arbitrum transaction","prompt":"Look up the transaction receipt for hash 0xDef...456 on Arbitrum mainnet using the Alchemy gateway — I need the status and gas used."},{"title":"Read DeFi smart contract state","prompt":"Call the Arbitrum mainnet Alchemy gateway to read the current liquidity reserves from the Uniswap V3 WETH/USDC pool contract at 0x123...789 using eth_call."}],"resultDescription":"The raw upstream response from Alchemy's Arbitrum mainnet node is passed through verbatim after payment is processed — this includes JSON-RPC results such as block data, transaction receipts, contract call outputs, token balances, or any other Alchemy-supported Arbitrum data.","failureModes":["Insufficient USDC balance causes payment failure and request rejection","Invalid or malformed path causes upstream 404 or routing error","Malformed JSON body causes Alchemy to return an RPC error","Alchemy API rate limit exceeded returns upstream 429","Invalid Arbitrum contract address or method signature returns RPC execution error","Network congestion may cause slow upstream response"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call access to Alchemy's Arbitrum One mainnet RPC without managing an Alchemy API key subscription — ideal for agents that need occasional or bursty Arbitrum blockchain queries billed in USDC micropayments via the x402 protocol.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:42:36.747Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-alchemy-arbitrum-mainnet-e8003143"}