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Genexxis Gas Price Oracle
x402
Genexxis Gas Price Oracle is a paid API for AI agents from gas.genexxis.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Returns current base fee, slow/standard/fast priority fees in gwei, and USD costs for native transfer, ERC-20 transfer, and Uniswap swap (including L1 data fee on rollups) for a specified EVM chain.
Price / call$0.002
Success—
StatusUnknown
How this service works
Current gas on one EVM chain: base fee and slow/standard/fast priority fee in gwei, and USD cost of a native transfer, an ERC-20 transfer and a Uniswap swap including the L1 data fee on rollups.
Output
A JSON object with chain name, native token, current native token USD price, base fee in gwei, slow/standard/fast priority fees in gwei, and USD costs (slow/standard/fast) for three transaction types — ETH transfer (21,000 gas), ERC-20 transfer (65,000 gas), and Uniswap swap (180,000 gas) — each including the L1 data fee where applicable for rollup chains.
Example use cases
DeFi bot pre-trade cost check
“Before I execute this Uniswap swap on Arbitrum, what will it cost me in USD at the standard gas tier right now, including the L1 data fee?”
Multi-chain gas comparison dashboard
“Pull the current gas prices for Ethereum, Base, and Polygon — I want the base fee in gwei and the USD cost of an ERC-20 transfer at standard speed for each chain.”
Gas alert threshold monitor
“Check the current fast gas price on Ethereum mainnet in gwei and tell me the USD cost of a native ETH transfer right now — I want to know if it's cheap enough to send.”
Technical details
Endpoint
GEThttps://gas.genexxis.com/now?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need current, real-time gas fee estimates for a specific EVM chain broken down by speed tier (slow/standard/fast) and expressed in both gwei and USD for practical transaction types — especially when operating on rollups where L1 data fees matter. It is more convenient than raw RPC calls because it bundles native token price conversion and pre-calculates costs for common transaction types in a single call.
Side effects
- Unsupported chain name returns an error — only ethereum, base, arbitrum, optimism, polygon, and bsc are valid
- Missing required 'chain' query parameter returns a validation error
- Network issues fetching live on-chain data may cause transient 500 errors
- Stale price data possible during high congestion periods
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "Base",
"chain": "base",
"nativeUsd": 2342.74,
"baseFeeGwei": 0.005,
"nativeToken": "ETH",
"transactions": {
"ethTransfer": {
"gas": 21000,
"costUsd": {
"fast": 0.000739,
"slow": 0.000265,
"standard": 0.000303
},
"l1DataFeeUsd": 8.75e-7
},
"uniswapSwap": {
"gas": 180000,
"costUsd": {
"fast": 0.00633,
"slow": 0.00226,
"standard": 0.0026
},
"l1DataFeeUsd": 0.00000355
},
"erc20Transfer": {
"gas": 65000,
"costUsd": {
"fast": 0.00229,
"slow": 0.000817,
"standard": 0.000938
},
"l1DataFeeUsd": 0.00000112
}
},
"priorityFeeGwei": {
"fast": 0.01,
"slow": 0.00036,
"standard": 0.00115
}
}
}Tags
x402
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