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QuickNode JSON-RPC Proxy — Optimism Mainnet
x402
QuickNode JSON-RPC Proxy — Optimism Mainnet is a paid API for AI agents from x402.quicknode.com, paid per call via x402, $10/call, status unknown (last checked 2026-09-14).
Proxies JSON-RPC 2.0 calls to the Optimism (OP) mainnet blockchain, enabling on-chain reads and writes via standard Ethereum JSON-RPC methods.
Price / call$10
Success—
StatusUnknown
How this service works
JSON-RPC proxy — optimism-mainnet
Output
Returns a standard JSON-RPC 2.0 response object containing the result of the requested method (e.g. block number, balance in hex wei, transaction receipt, contract call output) or a JSON-RPC error object with code and message if the call fails.
Example use cases
Monitor user wallet balances on Optimism
“Check the current ETH balance for our users' wallets on Optimism mainnet and flag any that have dropped below 0.1 ETH so we can send them a reminder to top up.”
Track smart contract state changes
“Call our reward contract on Optimism to get the latest total staked amount and claimable rewards for a user, then compare it to what we had cached yesterday to see if anything changed.”
Broadcast and verify transactions
“Send a raw transaction to swap tokens on Optimism mainnet, then poll the network every few seconds until you get a transaction receipt confirming it went through.”
Technical details
Endpoint
POSThttps://x402.quicknode.com/optimism-mainnet/When to prefer
Use this endpoint when you need to interact with the Optimism (OP) mainnet specifically — reading on-chain state, calling smart contracts, broadcasting transactions, or fetching blocks/receipts — and want a reliable, pay-per-call QuickNode RPC node without managing your own infrastructure. Prefer this over Ethereum mainnet endpoints when your target contracts or tokens are deployed on the Optimism L2 network.
Side effects
- Invalid JSON-RPC method name returns error code -32601 Method not found
- Malformed params array returns error code -32602 Invalid params
- Payment failure (insufficient USDC) results in 402 Payment Required before execution
- Network congestion or node unavailability returns 503 or timeout
- Calling a non-existent contract address returns empty result rather than 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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