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QuikNode Base Sepolia Testnet JSON-RPC
x402
QuikNode Base Sepolia Testnet JSON-RPC is a paid API for AI agents from x402.quiknode-cf.pro, paid per call via x402, $10/call, status unknown (last checked 2026-09-14).
Provides high-performance JSON-RPC access to the Base Sepolia testnet for deploying and testing smart contracts, sending transactions, and querying chain data.
Price / call$10
Success—
StatusUnknown
How this service works
High-performance JSON-RPC access to the Base Sepolia testnet (v2) for deploying and testing smart contracts, sending transactions, and querying chain data.
Output
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.
Example use cases
Deploy and test smart contract
“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?”
Estimate gas before sending
“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?”
Check transaction confirmation status
“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?”
Technical details
Endpoint
POSThttps://x402.quiknode-cf.pro/base-sepoliaWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| id | — | Request identifier |
| method | string | JSON-RPC method name (e.g., eth_blockNumber, eth_call) |
| params | array | Method parameters |
| jsonrpc | string |
Tags
x402
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