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X402 Settlement Amount Check
x402
X402 Settlement Amount Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-17).
Compares a settled raw payment amount against an accepted challenge amount to validate x402 payment settlement correctness
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Settlement Amount Check: X402 Settlement Amount Check compares settled raw amount with the accepted challenge amount from bounded caller-supplied values without an external provider. Call X402 Settlement Amount Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Settlement Amount Check as ve…
Output
Returns a structured response including: an explicit accept or reject status, contract-specific validation checks, normalized evidence derived from the two input amounts, and detailed mismatch reasons if the settled amount does not equal the accepted challenge amount.
Example use cases
Validate x402 payment before content release
“I received an x402 payment with a settled raw value of '500000' and the original accepted challenge was '500000' — can you verify those match and confirm it's safe to release the content?”
Detect underpayment in agent delivery
“An agent just delivered a result and claims to have settled '750000' raw, but the challenge I issued was for '1000000' — run an x402 settlement amount check and tell me if I should reject it.”
Audit x402 settlement integrity in automated pipeline
“In my automated x402 payment pipeline, for each settlement compare the settled raw amount '2000000' against the accepted raw amount '2000000' and return any mismatch reasons or acceptance status so I can decide whether to proceed.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-settlement-amount-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when operating an x402 payment flow and needing a fast, in-memory, no-external-dependency check that a settled payment amount exactly matches the originally accepted challenge amount before releasing content, fulfilling agent deliveries, or advancing a pipeline step. Prefer this over manual comparison logic when you need normalized evidence and structured mismatch reasoning rather than a simple boolean.
Side effects
- Invalid or non-numeric settled_raw value causes parsing failure
- Malformed accepted_raw string exceeding 8192 characters rejected
- Missing required fields returns validation error
- Amounts that are structurally valid but semantically mismatched result in explicit rejection status with mismatch reasons
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| settled_raw | string | Settled Raw supplied to X402 Settlement Amount Check; used only for this bounded calculation and processed in memory without retention. |
| accepted_raw | string | Accepted Raw supplied to X402 Settlement Amount Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"drift_raw": "0",
"actual_raw": "1000",
"expected_raw": "1000",
"within_tolerance": true
},
"schema": "delx/util-x402-settlement-amount-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "7a76b790f88a7769934e943afa794eaf1387220dd60021c92aba4d959a6a1cff",
"external_calls": 0
},
"operation": "delivery_contract:x402_settlement_amount_check"
}
}Tags
x402
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