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QuickNode: JSON-RPC proxy — arb-mainnet
x402
QuickNode: JSON-RPC proxy — arb-mainnet is a paid API for AI agents from x402.quicknode.com, paid per call via x402, $10/call, status unknown (last checked 2026-09-15).
Provides low-latency JSON-RPC access to Arbitrum One mainnet for sending transactions, reading blockchain state, and calling smart contracts.
Price / call$10
Success—
StatusUnknown
How this service works
Low-latency RPC access to the Arbitrum One mainnet for sending transactions, reading state, and interacting with smart contracts.
Output
A JSON-RPC 2.0 response object containing the result of the requested method (e.g. block data, balance in hex wei, transaction hash, contract return data) or a structured error object with code and message if the call fails.
Example use cases
Broadcast signed transaction to Arbitrum
“I have a signed transaction ready to go — can you broadcast it to Arbitrum One mainnet using eth_sendRawTransaction and give me back the transaction hash?”
Estimate gas for Arbitrum swap
“Before I submit this token swap, can you estimate the gas it would cost to execute on Arbitrum One using eth_estimateGas so I know if my gas limit is set correctly?”
Query ERC-20 balance on Arbitrum
“Can you call the balanceOf function on the USDC contract deployed on Arbitrum One to check how many tokens my wallet address currently holds?”
Technical details
Endpoint
POSThttps://x402.quicknode.com/arb-mainnetWhen to prefer
Choose this endpoint when you need real-time, low-latency RPC access specifically to Arbitrum One mainnet — for sending transactions, reading live chain state, or interacting with Arbitrum-deployed smart contracts. Prefer this over generic Ethereum endpoints when your target contracts or assets are on Arbitrum L2 rather than Ethereum mainnet or other chains.
Side effects
- Invalid JSON-RPC method name returns error code -32601 method not found
- Malformed params array returns error code -32602 invalid params
- Payment not provided or insufficient USDC results in 402 Payment Required
- Network congestion or node unavailability returns 503 or timeout
- Calling a non-existent contract address returns a revert or zero result
- Submitting a transaction with insufficient gas returns execution reverted error
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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