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X402 Settlement Network Check
x402
X402 Settlement Network Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Validates that a payment's settlement chain matches the accepted challenge network, returning a pass/fail verdict with mismatch reasons for x402 payments.
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Settlement Network Check: compares settlement chain with the accepted challenge network using only bounded caller-supplied values. Call when you need a bounded x402 settlement network check result 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 Network Check as versioned determinist…
Output
Returns an explicit accept or reject status, contract-specific validation checks, normalized evidence from the input networks, and a list of mismatch reasons explaining why the networks do or do not align.
Example use cases
Pre-payment network compatibility check
“I'm about to pay for an x402 service — the challenge says accepted_network is 'base-mainnet' but the settlement_network in the result is 'ethereum-mainnet'. Can you verify if these match and tell me if it's safe to proceed?”
Agent delivery validation before acceptance
“Before my agent accepts this assembled delivery, check that the settlement network 'base-sepolia' lines up with the accepted challenge network 'base-sepolia' and return any mismatch reasons if something's off.”
Automated x402 fraud guard in payment pipeline
“Run a settlement network check on this x402 payment — accepted_network is 'optimism-mainnet' and settlement_network is 'base-mainnet' — and tell me whether to accept or reject it with the specific reasons.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-settlement-network-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when operating within an x402 payment or agent delivery flow and you need a lightweight, no-external-provider check to confirm that the settlement chain in a result matches the network declared in the accepted challenge. Prefer this over manual string comparison when you need normalized evidence and structured mismatch reasons rather than a raw boolean.
Side effects
- Missing or empty accepted_network or settlement_network fields returns a validation error
- Inputs exceeding 8192 characters are rejected
- Ambiguous or unrecognized network identifiers may result in inconclusive checks
- Network string formatting inconsistencies may cause false mismatches
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| accepted_network | string | Accepted Network supplied to X402 Settlement Network Check; used only for this bounded calculation and processed in memory without retention. |
| settlement_network | string | Settlement Network supplied to X402 Settlement Network Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"actual": "eip155:8453",
"matched": true,
"expected": "eip155:8453"
},
"schema": "delx/util-x402-settlement-network-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "3f67bde369ab9e2fa887e91c329b545b0ab55c7e5f31ec07cec47e8c94798178",
"external_calls": 0
},
"operation": "delivery_contract:x402_settlement_network_check"
}
}Tags
x402
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