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Private-Rail x402 Settlement Verification Procedures
x402
Private-Rail x402 Settlement Verification Procedures is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-30).
Returns a normalized verification verdict for x402 payments on private rails (shielded pools, relay networks, private balances) by classifying the rail type and specifying required attestations before an agent settles.
Price / call$0.002
Success—
StatusDown
How this service works
Procedure for verifying payment and delivery evidence on x402 rails with no public explorer: shielded pools, private balances, relay networks. Classifies rail types, specifies which attestations to demand (relay receipt, ZK inclusion proof, shielded-pool nullifier semantics), checks finality claims, and returns a normalized verdict before the agent settles. 0.002 USDC on Base.
Output
A normalized settlement verdict object containing: a boolean success indicator, the classified rail type, required attestations for that rail, finality assessment, a prose decision procedure brief for the agent, generation source (llm/reasoning/deterministic), and an ISO-8601 timestamp.
Example use cases
Shielded pool payment finality check
“I received an x402 payment routed through a shielded pool with no public explorer — can you verify the nullifier semantics and tell me what attestations I need before I release the goods?”
Relay network settlement gate
“An agent just sent payment over a private relay network using x402 rails. Check the relay receipt and ZK inclusion proof and give me a verdict on whether I can safely settle.”
Private rail attestation requirements lookup
“I'm building an agent that accepts x402 payments on private rails and I need to know which attestations — relay receipt, ZK proof, or shielded-pool nullifier — I should demand for each rail type before settling.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/private-rail-x402-settlement-verification-proced?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent must settle an x402 payment on a private rail — shielded pool, relay network, or private balance — where no public block explorer exists to independently confirm finality. It is specifically designed for the attestation gap in private-rail x402 flows, classifying rail types and specifying exactly which proofs (relay receipt, ZK inclusion proof, nullifier semantics) are required. Prefer this over generic payment verification when dealing with zero-knowledge or privacy-preserving payment infrastructure.
Side effects
- Missing or malformed payment evidence causes verdict to return ok:false with explanation
- Unknown or unclassified rail type results in error with guidance on required fields
- Payment not yet final triggers a non-settled verdict with finality lag explanation
- Network errors reaching the verification service return a service-level error
- Free metadata mode (meta=1) returns schema only, not a verification verdict
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"brief": "plain prose decision procedure (120+ words)",
"model": "deepseek/deepseek-v4-flash-0731",
"topic": "string topic",
"service": "private-rail-x402-settlement-verification-proced",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "private-rail-x402-settlement-verification-proced",
"provider": "K-2SO"
}
}Tags
x402
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