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Arbitrum One Gas Conditions
x402
Arbitrum One Gas Conditions is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-30).
Returns current Arbitrum One 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 Arbitrum One 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: chain name ('arbitrum'), current block number, block timestamp, ETH/USD price (from Chainlink), base fee in gwei, gas price in gwei, max priority fee in gwei, and estimated costs for both a native ETH transfer and an ERC-20 transfer expressed in both ETH and USD. Note: excludes Arbitrum's L1 data fee surcharge.
Example use cases
Pre-transaction cost check
“Before I send this ERC-20 token on Arbitrum, can you tell me what the current gas price is and how much the transfer will cost me in USD right now?”
DeFi bot gas gate
“Check the current Arbitrum One base fee and estimated ERC-20 transfer cost — only proceed with the swap if gas is under $0.01.”
Gas price dashboard update
“Pull the latest Arbitrum One gas conditions for me — block number, base fee, gas price in gwei, and the USD cost of a native ETH transfer — so I can update my dashboard.”
Technical details
Endpoint
GEThttps://onchaincheck.dev/arbitrum/gas?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time gas cost estimates specifically for Arbitrum One, including both gwei-level fee data and USD-denominated transfer cost estimates using a live ETH price feed. Prefer this over generic gas trackers when you need ERC-20 vs native transfer cost breakdowns on Arbitrum specifically.
Side effects
- RPC node unavailable or rate-limited — may return 5xx error
- Chainlink ETH/USD feed stale or unavailable — USD estimates may be missing or outdated
- Network congestion causing delayed block data
- Payment not included or invalid — returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Excludes Arbitrum One's L1 data fee, which adds a small amount per transaction.",
"chain": "arbitrum",
"blockTime": "2026-10-22T15:50:24.000Z",
"nativeUsd": 2392.97,
"baseFeeGwei": "0.020256",
"blockNumber": 517269449,
"gasPriceGwei": "0.020256",
"nativeSymbol": "ETH",
"estimatedCost": {
"erc20Transfer": {
"usd": 0.003151,
"native": "0.00000131664"
},
"nativeTransfer": {
"usd": 0.001018,
"native": "0.000000425376"
}
},
"maxPriorityFeeGwei": "0"
}
}Tags
x402
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