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Scoped Session-Key Issuance Procedure for One-Off Agent Purchase Tasks
x402
Scoped Session-Key Issuance Procedure for One-Off Agent Purchase Tasks is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-21).
Returns a decision procedure (prose brief) guiding an agent on how to issue a short-lived, scoped session key for a single isolated purchase without retaining a standing credential.
Price / call$0.002
Success—
StatusDown
How this service works
Decision procedure for an agent that needs to buy something once and should not hold a standing credential to do it. Ordered checks: classify the task as one-off (single merchant, single purchase, no recurring spend), decide session key vs standing key (issue short-lived when the principal is absent or the spend is isolated), scope the key to exactly one merchant and one rail, set the spend ceiling as a fraction of task value, set TTL and single-use flags, bind the key to the purchase intent
Output
A plain-prose decision procedure (120+ words) detailing ordered checks and rules for issuing a scoped, short-lived session key for a single agent purchase: task classification, session vs standing key decision, merchant and rail scoping, spend ceiling as a fraction of task value, TTL and single-use flag configuration, and purchase-intent binding. Also includes metadata fields: model used, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and service slug.
Example use cases
One-time API data purchase by agent
“My agent needs to buy a single report from one data vendor — tell me how it should issue a scoped session key for just that transaction, with the right spend cap and expiry, so it doesn't hold any standing payment credential afterward.”
Isolated marketplace checkout for agent
“I'm building an agent that occasionally buys items from a specific online marketplace but should never hold a reusable payment key. What's the step-by-step procedure for creating a single-use, merchant-scoped session key tied to this one purchase?”
Spend-capped ephemeral key for task execution
“My agent has been given a task with a fixed budget and needs to pay for one service to complete it — can you give me the decision procedure for setting up a spend-ceiling-limited, short-lived session key that expires after the single transaction and is bound to the purchase intent?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/scoped-session-key-issuance-procedure-for-one-of?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent needs authoritative, structured guidance on how to issue a temporary, scoped payment credential for a single isolated purchase — particularly when following x402 protocol conventions, when the principal is absent, or when security policy forbids standing payment keys. Prefer this over generic credential management documentation when you need a concise, agent-readable decision procedure with explicit checks for spend ceiling, TTL, single-use flags, and merchant binding.
Side effects
- Payment required (402) if x402 payment header is not included in the request
- Invalid or malformed payment header returns authentication error
- Unsupported HTTP method (only GET/HEAD/DELETE allowed) returns method-not-allowed error
- topic query parameter ignored if not a recognized override — falls back to default topic
- Service unavailable or timeout from upstream LLM/reasoning engine returns 5xx error
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": "scoped-session-key-issuance-procedure-for-one-of",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "scoped-session-key-issuance-procedure-for-one-of",
"provider": "K-2SO"
}
}Tags
x402
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