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Delx Commerce — EVM Fee Cap Order Check
x402
Delx Commerce — EVM Fee Cap Order Check 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).
Validates that max_fee_per_gas_wei is correctly ordered relative to max_priority_fee_per_gas_wei for an EVM transaction preflight check
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: a boolean 'ordered' field indicating if max_fee_per_gas_wei >= max_priority_fee_per_gas_wei, the echoed input values, a 'status' field ('pass' or 'fail'), an 'operation' identifier ('evm_preflight:evm_fee_cap_order_check'), a schema version string, and an evidence block with retained=false, an input SHA256 hash for verifiability, and external_calls count (always 0, computed fully in-memory).
Example use cases
EVM transaction preflight gas validation
“I'm about to send an Ethereum transaction with a max fee per gas of 3000000000 wei and a max priority fee per gas of 150000000 wei — can you check whether those fee cap values are correctly ordered before I broadcast?”
Agent wallet gas fee sanity check
“My autonomous agent is about to submit an EVM transaction. Verify that max_fee_per_gas of 5000000000 wei and max_priority_fee_per_gas of 2000000000 wei are in the right order so the transaction won't be rejected.”
Debugging invalid gas fee parameters
“I keep getting errors when submitting my Ethereum transaction. Can you check if my fee parameters are ordered correctly? Max fee per gas is 1000000000 wei and max priority fee per gas is 1500000000 wei.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/evm-fee-cap-order-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automated wallet needs a lightweight, verifiable, pay-per-call preflight check that EVM gas fee parameters are sanely ordered (max_fee_per_gas >= max_priority_fee_per_gas) before broadcasting a transaction. Prefer it over manual in-code comparison when you need a cryptographically verifiable evidence receipt (SHA256 of inputs, zero external calls) and no data retention — particularly useful in trustless or auditable agent pipelines paying via USDC on Base or Solana through x402.
Side effects
- Invalid or non-numeric wei string values cause rejection
- Missing required fields result in a validation error
- Values exceeding maxLength of 8192 characters are rejected
- Network or payment failure via x402 protocol prevents call completion
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| max_fee_per_gas_wei | string | Max Fee Per Gas Wei supplied to EVM Fee Cap Order Check; used only for this bounded calculation and processed in memory without retention. |
| max_priority_fee_per_gas_wei | string | Max Priority Fee Per Gas Wei supplied to EVM Fee Cap Order Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"ordered": true,
"max_fee_per_gas_wei": "2000000000",
"max_priority_fee_per_gas_wei": "100000000"
},
"schema": "delx/util-evm-fee-cap-order-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "b04dce361f99458031086c658ad3571d192c3729ea28ea2ccad5d3960a15eaf2",
"external_calls": 0
},
"operation": "evm_preflight:evm_fee_cap_order_check"
}
}Tags
x402
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