{"uid":"cap_sjkjeAau5zSgu1lpVCjnc","slug":"quantaflow-x402-api-gateway-alchemy-sei-mainnet-6b8ce29b","name":"QuantaFlow x402 API Gateway – Alchemy Sei 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-sei-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_7nj7qFhgNuMOVjtalUuOs","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 paid API requests to the Alchemy Sei Mainnet RPC/API endpoint using the x402 micropayment protocol at $0.01 USDC per call","exampleAgentPrompt":"Look up the current token balance for wallet 0xABC123 on Sei mainnet using the Alchemy Sei endpoint — I'm okay paying a small per-request fee.","exampleUseCases":[{"title":"Fetch Sei wallet token balances","prompt":"What are the current token balances for wallet address 0x4F9a1bCdEf23456789abcdef1234567890ABCDEF on Sei mainnet? Use the Alchemy Sei mainnet gateway."},{"title":"Query latest block number on Sei","prompt":"Get the latest block number on the Sei mainnet blockchain right now via the Alchemy Sei RPC endpoint."},{"title":"Retrieve smart contract data on Sei","prompt":"Call the eth_call method on Sei mainnet against contract 0xDEADBEEF0000000000000000000000000000dead with calldata 0x70a08231 and return the result."}],"resultDescription":"The raw upstream response from the Alchemy Sei Mainnet API, passed through as-is, including the response body and content type. This may include JSON-RPC results, account data, block information, transaction receipts, or other blockchain query outputs depending on the path and method called.","failureModes":["Payment failure: x402 payment header missing or insufficient USDC balance results in HTTP 402","Invalid path: unrecognized Alchemy API path returns upstream 404 or error","Malformed body: invalid JSON in body field causes upstream parse error","Network timeout: Sei mainnet RPC node unavailable returns timeout error","Rate limiting: excessive requests may trigger upstream Alchemy rate limits"],"whenToPreferThis":"Choose this endpoint when you need pay-per-use access to Alchemy's Sei Mainnet RPC without committing to a subscription, and your agent already supports the x402 micropayment protocol. Ideal for low-frequency or bursty blockchain queries on Sei where a flat monthly API plan would be wasteful.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:37:23.973Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-alchemy-sei-mainnet-6b8ce29b"}