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Agent Retail Checkout Purchase Authorization Decision Procedure
x402
Agent Retail Checkout Purchase Authorization Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-20).
Returns a plain-prose decision procedure brief guiding an AI agent through retail checkout purchase authorization logic, delivered via x402 micropayment on Base.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic gate for an agent authorized to buy goods or services at x402 retail checkouts (gift cards, eSIMs, prepaid top-ups, table bookings, physical pickup items). Ordered checks: verify what is actually being purchased by parsing the checkout payload and comparing against the task's purchase intent, category allowlist from the principal with non-refundable and regulated categories flagged, price against 20% of task value plus checkout fee and rail fee, delivery verification before
Output
A JSON object containing a plain-prose decision procedure (120+ words) under `result.brief`, the service slug, generation timestamp, model used, generation source (llm/reasoning/deterministic), and payment confirmation fields including payer address and transaction hash.
Example use cases
E-commerce agent purchase gate
“My shopping agent needs a clear decision procedure for authorizing retail checkout purchases — walk it through what to verify before approving a transaction and when to block one.”
Autonomous merchant fraud check policy
“Can you get me a decision brief on how an agent should evaluate a retail purchase authorization request, especially for detecting potentially fraudulent or out-of-policy orders?”
Custom topic purchase authorization brief
“Fetch a decision procedure brief for an agent handling purchase authorization specifically for subscription retail checkout — I want the topic scoped to recurring billing scenarios.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-retail-checkout-purchase-authorization-p?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an autonomous agent needs on-demand, LLM-generated policy guidance specifically for retail checkout purchase authorization decisions. It is ideal for agents operating in e-commerce or merchant contexts that require a structured, prose decision framework rather than a hardcoded rule set, and where x402 micropayment infrastructure on Base is already in use. Prefer it over static rule engines when the agent needs adaptable, natural-language decision logic it can reason over at call time.
Side effects
- HTTP 402 returned if payment has not been settled — agent must pay exact USDC and retry with PAYMENT-SIGNATURE header
- Invalid or missing `method` enum value causes schema validation failure
- Malformed `input` object returns a 400-level error
- Network or provider downtime on Base may delay or reject payment settlement
- Topic override producing an out-of-scope query may return a generic or low-quality brief
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": "agent-retail-checkout-purchase-authorization-p",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "agent-retail-checkout-purchase-authorization-p",
"provider": "K-2SO"
}
}Tags
x402
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