{"uid":"cap_sNcc-z-YUcPGkSsMrlxWc","slug":"x402-quiknode-cf-pro-bbfe526d","name":"QuikNode Base Sepolia Testnet JSON-RPC","description":"High-performance JSON-RPC access to the Base Sepolia testnet (v2) for deploying and testing smart contracts, sending transactions, and querying chain data.","url":"https://x402.quiknode-cf.pro/base-sepolia","method":"POST","headers":{},"bodySchema":{"type":"object","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":null,"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_zE20h8UQ2o5Uc3yMOYyBh","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"10","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides high-performance JSON-RPC access to the Base Sepolia testnet for deploying and testing smart contracts, sending transactions, and querying chain data.","exampleAgentPrompt":"Can you call eth_getBalance on Base Sepolia testnet for address 0xAbc123... using JSON-RPC 2.0?","exampleUseCases":[{"title":"Deploy and test smart contract","prompt":"I just compiled my ERC-20 contract and want to deploy it to Base Sepolia for testing — can you send the deployment transaction and give me the contract address once it's mined?"},{"title":"Estimate gas before sending","prompt":"Before I submit this token transfer on Base Sepolia, can you estimate how much gas it'll need so I can set a safe limit without overpaying?"},{"title":"Check transaction confirmation status","prompt":"I sent a transaction on Base Sepolia a few minutes ago with hash 0xDef456... — can you pull the receipt and tell me whether it confirmed and how many block confirmations it has?"}],"resultDescription":"Returns a JSON-RPC 2.0 response object containing the result of the requested method call — such as a block number, account balance, transaction receipt, contract return value, or gas estimate — along with the matching request ID and any error details if the call failed.","failureModes":["Invalid JSON-RPC method name returns error code -32601","Malformed params array causes -32602 invalid params error","Network congestion or node unavailability returns 503 or timeout","Calling mainnet-only contract addresses returns empty or revert on testnet","Insufficient payment (x402) results in 402 Payment Required before execution"],"whenToPreferThis":"Choose this endpoint when you need reliable, low-latency RPC access to the Base Sepolia testnet specifically — ideal for CI/CD pipelines, smart contract testing, and dApp development where a managed QuikNode node is preferable to a public free-tier RPC with rate limits.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:38:21.950Z","isFirstParty":false}