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Multi-rail x402 Payment Audit-Trail Binding Procedure for Agents
x402
Multi-rail x402 Payment Audit-Trail Binding Procedure for Agents is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Returns a decision procedure brief explaining how agents paying across chains or bridges must bind model run, session key, CCTP transfer domain, and merchant settlement into one verifiable evidence chain.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic procedure: an agent that pays across chains or via bridges must bind the model run, session key, transfer domain (CCTP v2 or bridge), and merchant settlement into one verifiable evidence chain. Inputs: model run id, session key, source and destination rail, transfer hash, settlement receipt. Outputs: bound, gap, or unverifiable verdict with the exact missing link. Prevents the failure where payment settled on one chain but the audit trail cannot prove which computation authorized
Output
A structured paid response containing a prose decision-procedure brief (the 'brief' field) describing step-by-step how to bind model run, session key, CCTP transfer domain, and merchant settlement into a verifiable audit evidence chain; includes service slug, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and payment metadata confirming the micropayment was processed.
Example use cases
Cross-chain payment compliance audit
“My agent just executed a payment across two chains using a bridge and CCTP — walk me through the exact procedure to bind the model run, session key, transfer domain, and merchant settlement into a single verifiable audit trail so I can prove the payment chain is complete.”
Session key linkage for agent payment evidence
“I need to know how to properly link a session key to a CCTP domain and merchant settlement when my agent pays across chains — what's the decision procedure to make sure the evidence chain is tight and auditable?”
Closing audit-trail gaps in multi-rail agent transactions
“We're building an agent that pays via x402 across multiple rails and bridges, and our audit trail has a gap between the compute proof and the on-chain settlement — what's the procedure to close that seam and bind everything into one verifiable record?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/multi-rail-x402-payment-audit-trail-binding-procWhen to prefer
Choose this endpoint when an agent needs authoritative, blunt procedural guidance on how to construct a verifiable audit trail that spans model execution, session key management, CCTP cross-domain transfers, and merchant settlement — specifically for the x402 multi-rail payment context. Prefer this over generic compute-proof or attestation procedures when the gap being addressed is the binding of all four components (model run + session key + CCTP domain + merchant settlement) into a single evidence chain.
Side effects
- Payment not provided or invalid — returns 402 with payment required details
- Invalid method (POST/PUT not accepted) — returns method not allowed
- Topic override malformed — may return generic procedure rather than topic-specific brief
- Service temporarily unavailable — returns error with ok: false
- LLM generation failure — generationSource may fall back to deterministic with reduced detail
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": "multi-rail-x402-payment-audit-trail-binding-proc",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "multi-rail-x402-payment-audit-trail-binding-proc",
"provider": "K-2SO"
}
}Tags
x402
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