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Delx Commerce — EVM Value Plus Fee Budget Calculator
x402
Delx Commerce — EVM Value Plus Fee Budget 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 total required Wei amount by adding a transaction value (in Wei) and its associated fee ceiling, useful for EVM preflight budget checks before executing on-chain transactions.
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 containing the original value_wei, the computed required_wei (value plus fee ceiling), and the fee_ceiling_wei, along with a 'pass' status, the operation name, and an evidence block confirming no external calls were made and inputs were not retained (only an input SHA-256 hash is recorded).
Example use cases
Pre-send ETH transaction budget check
“I'm about to send 0.1 ETH on-chain — can you calculate the total wei I need including a fee ceiling of 84000000000000 wei so I can confirm I have enough in my wallet before submitting?”
DeFi swap preflight validation
“Before executing a DeFi swap worth 200000000000000000 wei, compute the total required wei with a fee ceiling of 42000000000000 wei so my agent knows whether to proceed or abort.”
Agent wallet budget planning
“My autonomous agent needs to plan how much wei to reserve for a batch of EVM calls — each has a value of 10000000000000000 wei and a fee ceiling of 21000000000000 wei. What's the required total wei per call?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/evm-value-plus-fee-budget?utm_source=zero.xyzWhen to prefer
Use this endpoint when an EVM agent or workflow needs a verifiable, tamper-evident preflight computation of total transaction budget (value + fee ceiling) before submitting an on-chain transaction, especially when auditability (SHA-256 evidence, no data retention) and pay-per-result micro-payment pricing matter. Prefer over manual arithmetic when operating in autonomous agent pipelines that require proof of computation.
Side effects
- Invalid or non-numeric string provided for value_wei or fee_ceiling_wei — likely returns a validation error
- Missing required fields — API may return a 4xx error indicating which parameters are absent
- Overflow if extremely large Wei values are provided beyond safe integer bounds
- Payment failure via x402 (USDC on Base/Solana) if the $0.001 micro-payment is not completed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value_wei | string | Value Wei supplied to EVM Value Plus Fee Budget; used only for this bounded calculation and processed in memory without retention. |
| fee_ceiling_wei | string | Fee Ceiling Wei supplied to EVM Value Plus Fee Budget; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"value_wei": "50000000000000000",
"required_wei": "50042000000000000",
"fee_ceiling_wei": "42000000000000"
},
"schema": "delx/util-evm-value-plus-fee-budget/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "c97960a555f73366664990411512e0dbb6ff9e788f1f8df5e0e28f4eb3bedeb6",
"external_calls": 0
},
"operation": "evm_preflight:evm_value_plus_fee_budget"
}
}Tags
x402
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