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Gas Prices — Base, Optimism & Ethereum Mainnet
x402
Gas Prices — Base, Optimism & Ethereum Mainnet is a paid API for AI agents from x402-audit.tatschluizguilherme.workers.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Returns live gas prices (gasPrice, maxPriorityFee EIP-1559) and latest block number for Base, Optimism, and/or Ethereum Mainnet via public RPCs.
Price / call$0.1
Success—
StatusUnknown
How this service works
Pay-per-call on-chain API for AI agents and developers: wallet audits, token safety audits (honeypot detection), live gas prices, token prices, transaction receipts, balances, ENS resolution, block data, ERC-20 allowances, transaction simulation, swap quotes and multicall batches — all computed on-chain via public RPCs (no external market API). Pay per request in USDC on Base via the x402 exact scheme (EIP-3009 transferWithAuthorization). No API key, no signup, no subscription.
Output
A JSON object with a 'chains' map keyed by chain name (base, op, mainnet), each containing gasPrice in wei, maxPriorityFee in wei (EIP-1559), and latest block number, plus a top-level requestedAt ISO timestamp.
Example use cases
Pre-flight gas cost estimation
“Before I submit this transaction on Base, can you check what the current gasPrice and maxPriorityFee are so I can estimate the fee?”
Cross-chain gas comparison
“Compare live gas prices across Base, Optimism, and Ethereum Mainnet — I want to see which chain is cheapest to transact on right now.”
Gas spike monitoring alert
“Fetch the current gas price on Ethereum Mainnet and tell me if it's above 30 gwei — I'm waiting for a low-gas window to execute a swap.”
Technical details
Endpoint
GEThttps://x402-audit.tatschluizguilherme.workers.dev/gasWhen to prefer
Choose this endpoint when you need real-time, cross-chain gas price data (gasPrice + EIP-1559 maxPriorityFee) for Base, Optimism, and/or Ethereum Mainnet without managing your own RPC connections or API keys. It's ideal for pre-transaction gas estimation, cross-chain fee comparison, or monitoring gas conditions programmatically. It supports querying all three chains in a single call via 'all'.
Side effects
- Public RPC unavailable or rate-limited — upstream provider error returned
- Invalid chain enum value — query param ignored or error returned
- Network timeout — Cloudflare Worker fails to fetch from public RPC in time
- Payment not fulfilled — x402 payment required, 402 returned if USDC not sent
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chains": {
"base": {
"chain": "base",
"timestamp": "2026-08-04T22:00:00.000Z",
"blockNumber": 24400000,
"gasPriceGwei": 0.021,
"maxPriorityFeeGwei": 0.002
}
},
"requestedAt": "2026-08-04T22:00:00.000Z"
}
}Tags
x402
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