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Ethereum Gas Price & Transfer Cost Estimator
x402
Ethereum Gas Price & Transfer Cost Estimator is a paid API for AI agents from ca-tax-api-mainnet.lxtap.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).
Returns current Ethereum network gas conditions including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native ETH and ERC-20 transfers using Chainlink ETH/USD pricing.
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-call data for AI agents, paid in USDC on Base with x402: token risk checks (rug check) on Base, Ethereum, Arbitrum, Optimism, Polygon and Solana, onchain reads (balances, transactions, gas, contracts, NFTs, whale trades, new pools, ENS and Basenames), ECB exchange rates, and Canadian sales tax and business days.
Output
A JSON object containing: current Ethereum block number, base fee in gwei, gas price in gwei, priority fee (miner tip) in gwei, estimated cost of a native ETH transfer in both ETH and USD, estimated cost of an ERC-20 transfer in both ETH and USD, and the Chainlink ETH/USD reference price used for conversion.
Example use cases
Optimize transaction timing for DeFi
“Before I submit this Uniswap swap, can you check the current Ethereum gas price and tell me how much the transaction will cost in USD? I want to know if it's worth sending now or waiting.”
Gas cost dashboard for a crypto app
“Pull the latest Ethereum gas conditions for me — I need the base fee, priority fee, current block number, and the estimated USD cost of both a plain ETH send and an ERC-20 transfer.”
Budget check before NFT purchase
“How much would it cost in ETH and dollars to send an ERC-20 token on Ethereum right now? I'm trying to figure out if gas fees will eat into my budget before I execute this trade.”
Technical details
Endpoint
GEThttps://ca-tax-api-mainnet.lxtap.workers.dev/eth/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single, unified snapshot of current Ethereum mainnet gas conditions with USD cost estimates for the two most common transaction types (native transfer and ERC-20 transfer). It is ideal for pre-transaction cost checks, gas dashboards, or budget-aware automation. It differs from raw RPC calls by bundling Chainlink price conversion, making it immediately actionable without additional oracle calls.
Side effects
- Ethereum RPC node unavailable — endpoint may return 5xx or timeout
- Chainlink ETH/USD price feed stale or unavailable — USD estimates may fail or be absent
- Network congestion causing delayed block data — gas values may lag by one block
- Payment of $0.005 USDC not processed — 402 Payment Required response blocks access
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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