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Private x402 Settlement Verification for Agents on Privacy Rails
x402
Private x402 Settlement Verification for Agents on Privacy Rails is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-31).
Returns a blunt decision procedure for verifying whether an x402 payment settled on a private ledger (zERC20-style), covering nullifier proofs, commitment verification, counterparty attestation, and dispute posture when proof is withheld.
Price / call$0.002
Success—
StatusDown
How this service works
Decision procedure for verifying x402 settlement on privacy rails where the ledger is not public. Covers zERC20-style private settlement: what evidence exists when neither party can cite a public transaction, witness and nullifier proof handling, commitment verification, counterparty attestation weight, dispute posture when proof is withheld, and when to treat a private payment as unverifiable versus settled. Inputs, thresholds, failure modes. Blunt decision procedure, not marketing.
Output
A prose decision procedure (brief) generated by the K-2SO service, covering: what evidence is expected for a valid private x402 settlement (nullifier proofs, commitments, witnesses), how to weight counterparty attestation without a public tx, thresholds for treating a payment as settled vs. unverifiable, failure modes such as withheld proofs, and the appropriate dispute posture in each scenario. Also includes metadata: service slug, generation source (llm/reasoning/deterministic), model used, and ISO-8601 timestamp.
Example use cases
Agent dispute over missing public tx
“I'm an agent that received an x402 payment claim for a service I delivered, but there's no on-chain transaction visible — the payer says it settled privately via zERC20. What's the decision procedure for deciding whether to treat this as settled or dispute it?”
Nullifier proof validation before releasing goods
“Before I release the digital asset to the buyer, they've sent me a nullifier proof as evidence of their private x402 payment. Walk me through how to evaluate whether that nullifier proof is sufficient evidence of settlement.”
Counterparty withheld proof posture
“The agent on the other side of my x402 deal is refusing to provide a commitment witness or nullifier — they just claim the payment went through privately. What's my dispute posture and at what point should I treat this payment as unverifiable rather than settled?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/private-x402-settlement-verification-for-agents?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent needs a concrete, blunt decision procedure for verifying x402 payments on privacy rails (zERC20-style) where no public ledger entry exists. Prefer this over generic payment verification tools when the dispute involves nullifier proofs, commitment witnesses, or counterparty attestation without a public transaction hash. Not appropriate for verifying standard on-chain USDC or ERC-20 transfers with a public tx.
Side effects
- Payment required but not provided — returns 402 with payment details
- Topic override not recognized — procedure may default to generic x402 private settlement logic
- LLM generation failure — result.ok may be false with no brief returned
- Network timeout on k2so.wrong.systems — no response
- Meta mode (meta=1) returns free metadata JSON rather than the paid decision procedure
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-x402-settlement-verification-for-agents",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "private-x402-settlement-verification-for-agents",
"provider": "K-2SO"
}
}Tags
x402
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