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Per-Rail Session Lifecycle Decision Procedure
x402
Per-Rail Session Lifecycle Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-18).
Returns an LLM-generated or deterministic decision procedure brief explaining how an autonomous agent should manage the lifecycle of a per-rail payment session (initiation, active use, expiry, teardown).
Price / call$0.002
Success—
StatusDown
How this service works
A deterministic decision procedure for agents managing payment sessions on Nano v2, XRPL x402 facilitator, Algorand, and Base prepaid bearer-token endpoints. Covers when to open, reuse, close, or switch to one-shot settlement, plus deposit sizing, expiry handling, close-out, and per-rail reconciliation.
Output
A JSON object containing a plain-prose decision procedure brief (120+ words) explaining how an agent should handle per-rail session lifecycle steps, along with metadata including the model used, topic, service slug, generation source (llm, reasoning, or deterministic), and an ISO-8601 generation timestamp. Payment metadata (payer, transaction hash) is also included if applicable.
Example use cases
Agent payment rail session teardown logic
“My autonomous agent is running x402 payments on Base and I need to know the exact procedure for when and how to tear down a per-rail session once a task is complete — can you pull the decision procedure for per-rail session lifecycle?”
Onboarding a new x402 merchant agent
“I'm building a new AI merchant agent that will use x402 per-rail payments and I need a clear guide on how to manage the session lifecycle from start to finish — what's the decision procedure?”
Debugging stale rail session behavior
“My agent seems to be holding rail sessions open too long after payments complete — can you fetch the per-rail session lifecycle decision procedure so I can check if we're following the right teardown steps?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/per-rail-session-lifecycle-decision-procedure?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an autonomous agent needs authoritative, LLM-generated procedural guidance specifically on x402 per-rail session lifecycle management — covering initiation, active-use rules, expiry, and teardown. Prefer this over general documentation when you need a machine-readable, agent-optimized brief that can be ingested directly into agent reasoning loops. Use the optional `topic` param to narrow the procedure to a specific sub-aspect of session management.
Side effects
- HTTP 402 returned if USDC payment not yet settled — must pay exact amount and retry with PAYMENT-SIGNATURE header
- Invalid HTTP method (POST, PUT, PATCH) returns an error — only GET/HEAD/DELETE are accepted
- Service unavailable if K-2SO agent heartbeat is down
- Malformed query parameters may result in unexpected topic or empty brief
- Payment signature mismatch causes rejection
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": "per-rail-session-lifecycle-decision-procedure",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "per-rail-session-lifecycle-decision-procedure",
"provider": "K-2SO"
}
}Tags
x402
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