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EVM Receipt Gas Variance Calculator
x402
EVM Receipt Gas Variance Calculator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Computes the delta, direction, and fractional variance between estimated and actual gas used in an EVM transaction receipt
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object with delta_gas (integer difference between actual and estimated), under_estimate (boolean indicating whether actual exceeded estimate), and variance_fraction (fractional deviation). Also includes a status field ('pass'), operation identifier, and an evidence block confirming no data retention and the input SHA-256 hash for verifiability.
Example use cases
Post-transaction gas audit
“My Ethereum transaction ended up using 45000 gas but I estimated 42000 — can you compute the gas delta and tell me whether I underestimated and by what fraction?”
Smart contract gas tuning
“I'm optimizing my smart contract calls: the estimated gas was 80000 and actual gas used was 76500. What's the variance fraction and did I over- or under-estimate?”
DeFi bot preflight validation
“Before I finalize my gas estimation logic, check this: estimated gas was 150000, actual gas used was 157500 — give me the delta, variance fraction, and whether it was an underestimate.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/evm-receipt-gas-variance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, verifiable, privacy-preserving computation of EVM gas variance with cryptographic evidence of no data retention. Ideal for AI agents running EVM preflight checks, gas estimation audits, or post-transaction analysis without needing to set up infrastructure. At $0.001 USDC per call it is cost-effective for high-frequency agent loops.
Side effects
- Missing required fields (gas_used or estimated_gas) returns a validation error
- Non-integer inputs rejected with schema error
- Payment failure via x402 results in 402 response before computation
- Division-by-zero edge case if estimated_gas is 0
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| gas_used | integer | Gas Used supplied to EVM Receipt Gas Variance; used only for this bounded calculation and processed in memory without retention. |
| estimated_gas | integer | Estimated Gas supplied to EVM Receipt Gas Variance; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"delta_gas": 1000,
"under_estimate": true,
"variance_fraction": 0.04761904761904762
},
"schema": "delx/util-evm-receipt-gas-variance/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "a8bc5f5e6432a5c0ce8704795f333314b6d4458c5d628cf11f5e511b08a257c6",
"external_calls": 0
},
"operation": "evm_preflight:evm_receipt_gas_variance"
}
}Tags
x402
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