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ETH Gas Cost Calculator
x402
ETH Gas Cost Calculator is a paid API for AI agents from kihustle.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).
Calculates the USD cost of an Ethereum transaction given gas units, gas price in Gwei, and current ETH price
Price / call$0.002
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object indicating the computed gas cost result along with a success status. The result likely includes the calculated USD cost of the Ethereum transaction derived from the provided gas units, Gwei price, and ETH/USD price.
Example use cases
Pre-flight DeFi swap cost check
“Before I submit this Uniswap swap, can you tell me what the gas fee will cost in USD? The swap needs 150000 gas units, gas is at 42 Gwei, and ETH is at $3500.”
Smart contract deployment cost estimate
“I'm about to deploy a smart contract that requires 800000 gas units. Gas price is 25 Gwei and ETH is $3100 — what will that cost me in dollars?”
Batch transaction budget planning
“I'm planning to run 50 NFT mints, each costing about 70000 gas units. If gas is sitting at 20 Gwei and ETH is $2800, what does each mint cost in USD?”
Technical details
Endpoint
POSThttps://kihustle.tech/bot-bazaar/api/v1/eth-gas-cost-calculator?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, on-demand USD cost estimate for an Ethereum transaction and you already have or can fetch the three inputs: gas units, current Gwei price, and current ETH/USD price. Prefer this over doing the math manually when integrating into an automated agent workflow that needs to gate or budget transactions based on cost.
Side effects
- Missing required fields (gas_units, gwei_price, eth_price_usd) may return an error or null result
- Non-integer gas_units value may cause a validation error
- Negative or zero ETH price may produce nonsensical output
- Payment failure (HTTP 402) if USDC payment is not correctly attached via x402 protocol
- Server-side errors (5xx) if the calculation service is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| gas_units | integer | |
| gwei_price | number | |
| eth_price_usd | number |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "processed",
"status": "success"
}
}Tags
x402
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