{"uid":"cap_YTvmXqi4MX-254ccJVOLR","slug":"phantom-api-sei-network-rpc-endpoint-339206da","name":"Phantom API — Sei Network RPC Endpoint","description":"Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.","url":"https://phantom-api-omega.vercel.app/api/sei/rpc","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"method":{"type":"string"},"params":{"type":"array","items":{}}}},"responseSchema":null,"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_SDD0rqXribCdDVQWCHP86","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":"Provides JSON-RPC access to the Sei blockchain network, enabling queries and transactions on Sei via pay-per-call Web3 infrastructure.","exampleAgentPrompt":"Can you check the current block number and my account balance for address 0xABC123 on the Sei blockchain right now?","exampleUseCases":[{"title":"Check Sei account balance","prompt":"Look up the current token balance for Sei address sei1qg5ega6dykkxc307y25pecuufrjkxkag6sqr6p and tell me what it holds."},{"title":"Fetch latest Sei block data","prompt":"What is the latest block on the Sei network? Give me the block number, timestamp, and transaction count."},{"title":"Query Sei smart contract state","prompt":"Call the smart contract at address sei1xyz on Sei mainnet using the 'getReserves' method with no params and show me the result."}],"resultDescription":"Returns standard JSON-RPC response objects containing blockchain data such as block information, account balances, transaction receipts, smart contract return values, or network status — matching standard Ethereum/Cosmos-compatible RPC response formats for the Sei network.","failureModes":["Invalid JSON-RPC method name returns method-not-found error","Malformed params array causes invalid params error","Network congestion or node unavailability causes timeout","Insufficient x402 payment causes 402 Payment Required response","Querying non-existent address or block returns null result"],"whenToPreferThis":"Choose this endpoint when you need fast, pay-per-call RPC access to the Sei blockchain without managing your own node or committing to a subscription. Ideal for agents making occasional or bursty Sei network queries, reading on-chain state, or broadcasting transactions to Sei with no infrastructure overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:48:45.281Z","isFirstParty":false}