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Delx EVM Value Plus Fee Budget
x402
Delx EVM Value Plus Fee Budget is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Calculates the total Wei required to cover a given transaction value plus a capped fee, for EVM preflight budget checks.
Price / call$0.001
Success—
StatusUnknown
How this service works
EVM Value Plus Fee Budget: EVM Value Plus Fee Budget sums transaction value and fee ceiling for a funding requirement from bounded caller-supplied values without an external provider. Call EVM Value Plus Fee Budget before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Value Plus Fee Budget as versioned deterministic JSON…
Output
Returns a JSON object with the original value_wei, the computed required_wei (value plus fee), and the fee_ceiling_wei used, along with a status of 'pass', the operation name, and an evidence block confirming no data was retained and no external calls were made.
Example use cases
Preflight budget check before on-chain transfer
“I'm about to send 0.05 ETH on-chain. Can you calculate the total Wei I need to have in my wallet if my fee ceiling is 42000000000000 Wei and the transfer value is 50000000000000000 Wei?”
Agent validates available funds before executing swap
“Before my agent executes a token swap worth 100000000000000000 Wei, check whether adding a fee ceiling of 80000000000000 Wei gives me a required_wei figure I can compare against my balance.”
Batch transaction budget planning
“I'm planning a series of EVM contract calls and need to know the required Wei for each step. First one has a value of 25000000000000000 Wei and a fee ceiling of 21000000000000 Wei — what's the total required?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/evm-value-plus-fee-budgetWhen to prefer
Use this endpoint when an AI agent needs to perform a preflight EVM budget calculation — specifically to determine the total Wei required for a transaction that includes both a value transfer and a fee cap — before submitting on-chain. It is stateless, runs in memory without data retention, and is purpose-built for autonomous agent workflows that need deterministic, bounded arithmetic on EVM Wei amounts without calling an external node.
Side effects
- Invalid or non-numeric Wei string causes a validation error
- value_wei or fee_ceiling_wei exceeds maxLength of 8192 characters
- Missing required fields returns a schema validation error
- Extremely large Wei values may cause overflow or precision issues
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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