{"uid":"cap_MMLfC9hCJfRiaetoY17p9","slug":"quicknode-68d693f3","name":"QuickNode JSON-RPC Proxy — Optimism Sepolia","description":"JSON-RPC proxy — optimism-sepolia","url":"https://x402.quicknode.com/optimism-sepolia/","method":"POST","headers":{},"bodySchema":{"type":"object","required":["jsonrpc","method"],"properties":{"id":{"type":["number","string"],"description":"Request identifier"},"method":{"type":"string","description":"JSON-RPC method name (e.g., eth_blockNumber, eth_call)"},"params":{"type":"array","description":"Method parameters"},"jsonrpc":{"type":"string","const":"2.0"}}},"responseSchema":{"type":"object","properties":{"id":{"type":["number","string"]},"error":{"type":"object","properties":{"code":{"type":"integer"},"message":{"type":"string"}}},"result":{"description":"RPC result (type varies by method)"},"jsonrpc":{"type":"string","const":"2.0"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0001","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":"$10/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"10","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"10","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_T5GvjVo7hKYo6kX9wZ-NQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"10","costPer":"request","priority":0,"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Proxies JSON-RPC calls to the Optimism Sepolia testnet blockchain via QuickNode's infrastructure","exampleAgentPrompt":"Call eth_getBalance on Optimism Sepolia testnet for address 0xAbC...123 — use the QuickNode JSON-RPC proxy to get the current balance in wei.","exampleUseCases":null,"resultDescription":"Returns a standard JSON-RPC 2.0 response object containing the result of the requested blockchain method — e.g. block number as a hex string, account balance in wei, transaction receipt object, or smart contract return data — along with the original request ID and jsonrpc version field.","failureModes":["Invalid JSON-RPC method name returns error code -32601 (method not found)","Malformed params array returns error code -32602 (invalid params)","Network unavailable or node down returns HTTP 503","Payment not included or insufficient returns HTTP 402","Rate limit exceeded returns HTTP 429","Contract call reverts returns execution error in result field"],"whenToPreferThis":"Use this endpoint when you need to interact with the Optimism Sepolia testnet specifically — ideal for testing smart contracts, checking testnet balances, or developing Optimism Layer 2 applications before mainnet deployment. Prefer this over Ethereum Sepolia when targeting OP Stack contracts or Optimism-specific RPC methods.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:39:52.646Z","isFirstParty":false}