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Ethereum Gas Conditions Snapshot
x402
Ethereum Gas Conditions Snapshot is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Returns current Ethereum network gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.
Price / call$0.005
Success—
StatusUnknown
How this service works
Current Ethereum gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD).
Output
A JSON object containing the chain identifier ('eth'), current block number, block timestamp, ETH/USD price, base fee in gwei, gas price in gwei, max priority fee in gwei, and estimated costs for a native ETH transfer and an ERC-20 transfer expressed in both native ETH and USD.
Example use cases
Timing a low-fee Ethereum transaction
“Check the current Ethereum gas fees and tell me how much it would cost in USD to send ETH right now — I want to know if it's a good time to transact or if I should wait.”
DeFi bot pre-trade cost estimation
“Before I execute this ERC-20 swap on Ethereum, pull the current gas conditions and estimate what the transfer fee will cost me in USD so I can decide if the trade is still profitable.”
Gas dashboard for a wallet app
“Give me a live snapshot of Ethereum gas right now: current block number, base fee, gas price, priority fee in gwei, and the estimated USD cost for both a native transfer and an ERC-20 transfer.”
Technical details
Endpoint
GEThttps://onchaincheck.dev/eth/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time Ethereum gas metrics in a single call without running your own node — especially useful for pre-transaction cost estimation, gas timing logic, or displaying live fee data in a UI. Prefer this over raw RPC calls when you also need USD cost estimates using a reliable oracle price feed without additional integration work.
Side effects
- Ethereum node unavailable or lagging — may return stale block data
- Chainlink ETH/USD oracle feed delay — USD estimates may be slightly outdated
- Rate limiting or payment failure — 402 response if x402 payment not included or rejected
- Network congestion causing response latency spikes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "eth",
"blockTime": "2026-10-22T15:49:59.000Z",
"nativeUsd": 2398.41,
"baseFeeGwei": "0.316485501",
"blockNumber": 26249161,
"gasPriceGwei": "0.316485501",
"nativeSymbol": "ETH",
"estimatedCost": {
"erc20Transfer": {
"usd": 0.04934,
"native": "0.000020571557565"
},
"nativeTransfer": {
"usd": 0.01594,
"native": "0.000006646195521"
}
},
"maxPriorityFeeGwei": "0.000003839"
}
}Tags
x402
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