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Delx Commerce X402 Refund Amount Check
x402
Delx Commerce X402 Refund Amount 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).
Verifies whether a settled payment amount matches the requested amount within acceptable tolerance for X402 protocol refund calculations
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 drift_raw (difference between expected and actual), actual_raw, expected_raw, within_tolerance boolean, an overall status (pass/fail), operation identifier, and an evidence block containing the input SHA-256 hash and confirmation that no external calls were made and no data was retained.
Example use cases
Verify micropayment before issuing refund
“Before I process a refund for this x402 transaction, check whether the settled raw amount '950' actually matches the requested raw amount '1000' — tell me the drift and whether it's within acceptable tolerance.”
Audit agent payment delivery accuracy
“My AI agent just completed a pay-per-result API call and the settled amount was '1000' raw units but the request was for '1000' — can you run the x402 refund amount check to confirm there's zero drift and delivery was correct?”
Detect underpayment in USDC transaction
“I need to verify a USDC payment where the settled raw value was '850' but the requested raw value was '1000' — run the refund amount check and tell me if it passes or fails tolerance.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/x402-refund-amount-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a verifiable, cryptographically evidenced check of whether a settled X402 payment amount matches the requested amount — particularly when building refund logic, auditing agent payment pipelines, or confirming delivery fidelity in pay-per-result architectures on Base or Solana. Prefer this over manual calculation when you need the tamper-evident evidence hash and explicit tolerance logic baked in.
Side effects
- Invalid or non-numeric raw values cause validation to fail
- Missing settled_raw or requested_raw fields return an error
- Strings exceeding 8192 characters are rejected
- Malformed JSON body returns a 400 error
- Large drift beyond tolerance returns within_tolerance: false with a fail status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| settled_raw | string | Settled Raw supplied to X402 Refund Amount Check; used only for this bounded calculation and processed in memory without retention. |
| requested_raw | string | Requested Raw supplied to X402 Refund 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-refund-amount-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "8f2b3a0b094ceb2d8c75d4ce4b7f179347769e2b9645666d7c973aae510291f0",
"external_calls": 0
},
"operation": "delivery_contract:x402_refund_amount_check"
}
}Tags
x402
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