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Delx EVM Allowance Budget Check
x402
Delx EVM Allowance Budget Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Checks whether an EVM token allowance is sufficient to cover a required spend amount, returning a pass/fail result with shortfall details.
Price / call$0.001
Success—
StatusUnknown
How this service works
EVM Allowance Budget Check: EVM Allowance Budget Check checks caller-supplied allowance against a required token amount from bounded caller-supplied values without an external provider. Call EVM Allowance Budget Check 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 Allowance Budget Check as versioned deterministic…
Output
Returns a JSON object with a boolean 'sufficient' flag, the required_raw and available_raw amounts, the shortfall_raw (0 if sufficient), a pass/fail status string, the operation name, and evidence metadata including whether inputs were retained and number of external calls made.
Example use cases
Pre-transaction allowance preflight
“I'm about to call a smart contract that requires 3000000 raw token units — can you check whether my current approved allowance of 2500000 raw units is enough, and tell me the shortfall if not?”
Agent DeFi workflow guard
“Before my agent submits the DeFi position, verify that the allowance of 5000000 raw units covers the 4200000 raw units required by the protocol, and flag it if we're short.”
Budget check before batch token spend
“I have an allowance of 1000000 raw units set for this contract — check if that's sufficient for the 800000 raw units I need to spend and confirm whether we're good to proceed.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/evm-allowance-budget-checkWhen to prefer
Use this endpoint when an AI agent needs to preflight-check an EVM token allowance before submitting an on-chain transaction or smart contract call. It is purpose-built for autonomous agent workflows where spending raw token units need to be validated against an approved allowance without any external blockchain RPC calls — the computation is done in-memory with no state retention, making it safe for sensitive budget data.
Side effects
- Missing or malformed required_raw or allowance_raw values (non-numeric strings may cause computation failure)
- Values exceeding maxLength of 8192 characters rejected
- Network or service unavailability returning 5xx errors
- Payment required errors (402) if USDC balance insufficient for the $0.001 fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required_raw | string | Required Raw supplied to EVM Allowance Budget Check; used only for this bounded calculation and processed in memory without retention. |
| allowance_raw | string | Allowance Raw supplied to EVM Allowance Budget Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"sufficient": true,
"required_raw": "1500000",
"available_raw": "2000000",
"shortfall_raw": "0"
},
"schema": "delx/util-evm-allowance-budget-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "86f8e28708672cfff8511f7fd84c12592b126a4ae90afbc3845c23a473821c16",
"external_calls": 0
},
"operation": "evm_preflight:evm_allowance_budget_check"
}
}Tags
x402
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