{"uid":"cap_GgczjV-SLrCs5XnzFjeJo","slug":"quantaflow-x402-api-gateway-infura-polygon-mainnet-59913bbd","name":"QuantaFlow x402 API Gateway – Infura Polygon 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/infura-polygon-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_f8OKLqSNPlkH06HScBM-0","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 JSON-RPC and REST requests to Infura's Polygon Mainnet node via a pay-per-call x402 micropayment gateway at $0.01 USDC per request","exampleAgentPrompt":"Query the Infura Polygon Mainnet node to get the latest block number — send a eth_blockNumber JSON-RPC call and pay the $0.01 USDC fee per request.","exampleUseCases":[{"title":"Check Polygon wallet balance","prompt":"Look up the MATIC balance for wallet address 0xAbCd...1234 on Polygon mainnet using the Infura node — send an eth_getBalance call for the latest block."},{"title":"Fetch smart contract state","prompt":"Call the balanceOf method on the USDC contract at 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon mainnet for address 0xDeAd...BeeF so I can see how many USDC tokens they hold."},{"title":"Retrieve Polygon transaction receipt","prompt":"Get the transaction receipt for tx hash 0xabc123...def456 on Polygon mainnet — I need to know if it confirmed and what gas was used."}],"resultDescription":"The raw upstream response from Infura's Polygon Mainnet node is passed through directly — typically a JSON-RPC result object containing blockchain data such as block numbers, balances, transaction receipts, or contract return values, along with the appropriate content-type header.","failureModes":["Payment failure: insufficient USDC balance causes 402 Payment Required before the upstream call is made","Invalid JSON-RPC method or malformed body returns upstream Infura error (e.g. -32601 method not found)","Incorrect path routing results in a 404 from the gateway","Rate limiting or Infura quota exhaustion returns a 429 or upstream 503","Network timeout from Infura returns a 504 or empty response"],"whenToPreferThis":"Choose this endpoint when you need permissionless, pay-per-call access to Polygon Mainnet blockchain data via Infura without managing an Infura API key subscription. Ideal for low-volume or sporadic Polygon RPC queries where a monthly subscription is overkill, or for autonomous agents that need to self-fund blockchain queries using USDC micropayments via the x402 protocol.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T00:52:15.034Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-infura-polygon-mainnet-59913bbd"}