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X402 Settlement Recipient Check
x402
X402 Settlement Recipient Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).
Validates that an x402 payment settlement recipient matches the expected pay-to address, returning acceptance/rejection status and mismatch reasons.
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Settlement Recipient Check: X402 Settlement Recipient Check compares settlement recipient with the accepted pay-to address from bounded caller-supplied values without an external provider. Call X402 Settlement Recipient 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 Recipient…
Output
Returns an explicit acceptance or rejection status, contract-specific validation checks, normalized evidence from the provided addresses, and detailed mismatch reasons explaining any discrepancy between the pay_to and recipient values.
Example use cases
Guard against wrong pay-to in agent delivery
“We're about to finalize an x402 agent delivery — the pay_to from the challenge is '0x1234abcd...' and the recipient in the result metadata is '0x5678efgh...'. Can you verify these match before we release payment?”
Fraud check before x402 transaction
“I have an incoming x402 payment request where pay_to is '0xAAA111...' and the claimed recipient is '0xBBB222...'. Run a recipient check and tell me if these are consistent or if something looks off.”
Automated x402 settlement validation in payment pipeline
“In our payment pipeline, the x402 challenge says pay_to is '0xMerchant42...' but the settlement result shows recipient '0xMerchant42...'. Confirm the recipient check passes so we can mark this payment accepted.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-settlement-recipient-check?utm_source=zero.xyzWhen to prefer
Use this endpoint whenever you need to verify x402 payment settlement integrity before accepting or executing a payment, particularly in agentic pipelines where challenge and result metadata come from caller-supplied or untrusted sources. It performs the check in-memory without external calls or data retention, making it suitable for security-sensitive pre-payment validation. Prefer this over manual address comparison when you need structured rejection evidence and normalized output.
Side effects
- Missing or empty pay_to or recipient fields — validation cannot run without both values
- Addresses exceed maxLength of 8192 characters — request rejected
- Malformed address strings that cannot be parsed or normalized
- Network or service error returning 5xx — retry recommended
- Mismatch detected between pay_to and recipient — returns rejection status with specific mismatch reasons
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| pay_to | string | Pay To supplied to X402 Settlement Recipient Check; used only for this bounded calculation and processed in memory without retention. |
| recipient | string | Recipient supplied to X402 Settlement Recipient Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"actual": "0x1111111111111111111111111111111111111111",
"matched": true,
"expected": "0x1111111111111111111111111111111111111111"
},
"schema": "delx/util-x402-settlement-recipient-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "e670f19cbdd7aaae3edbde715feff65196c9b5cafb580a8d0d7ef09720d6cffa",
"external_calls": 0
},
"operation": "delivery_contract:x402_settlement_recipient_check"
}
}Tags
x402
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