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QuickNode JSON-RPC Proxy — Base Sepolia
x402
QuickNode JSON-RPC Proxy — Base Sepolia is a paid API for AI agents from x402.quicknode.com, paid per call via x402, $10/call, status unknown (last checked 2026-09-14).
Proxies JSON-RPC requests to the Base Sepolia testnet, enabling Ethereum-compatible blockchain queries and interactions on the Base L2 test network.
Price / call$10
Success—
StatusUnknown
How this service works
JSON-RPC proxy — base-sepolia
Output
Returns a standard JSON-RPC 2.0 response object containing the result of the requested method (e.g. block data, balance in wei, transaction receipt, contract return value) or an error object if the call fails.
Example use cases
Example prompt
“Call eth_getBalance on Base Sepolia testnet for address 0xAbC123... at the latest block — use the QuickNode JSON-RPC proxy.”
Technical details
Endpoint
POSThttps://x402.quicknode.com/base-sepolia/When to prefer
Use this endpoint when you need to interact with the Base Sepolia testnet specifically — ideal for testing Base L2 smart contracts, simulating transactions, or querying testnet state without spending real funds. Prefer this over mainnet endpoints when doing development or QA on Base.
Side effects
- Invalid JSON-RPC method name returns error code -32601
- Malformed params array returns error code -32602
- Payment not received or insufficient USDC results in 402 Payment Required
- Network unavailable or node sync issues return 503 or timeout
- Unsupported method for Base Sepolia returns error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| id | — | Request identifier |
| methodrequired | string | JSON-RPC method name (e.g., eth_blockNumber, eth_call) |
| params | array | Method parameters |
| jsonrpcrequired | string |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| id | — | |
| error | object | |
| result | — | RPC result (type varies by method) |
| jsonrpc | string |
Tags
x402
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