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Execution-Time Quote Re-Authorization Gate for Agent Spend
x402
Execution-Time Quote Re-Authorization Gate for Agent Spend is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).
Re-validates an x402 payment quote against the live policy stack at execution time, returning APPROVE, RE-QUOTE, or BLOCK to prevent agents from settling at stale prices.
Price / call$0.002
Success—
StatusUnknown
How this service works
Decision procedure for the settlement-time spend gate. When an agent prepares an x402 payment, the final quoted price must re-clear the full live policy stack at execution time: active session, per-transaction cap, remaining rolling budget, category and merchant rules, pause and revoke status. Never authorize against the price the agent saw during planning. The procedure returns APPROVE, RE-QUOTE, or BLOCK: APPROVE when the quote matches the policy snapshot and budget accounting is
Output
Returns a JSON object with a decision of APPROVE, RE-QUOTE, or BLOCK, accompanied by plain-prose procedure text (120+ words) explaining the reasoning, a policy snapshot, budget accounting status, and metadata including model used, generation source (llm/reasoning/deterministic), and ISO-8601 timestamp.
Example use cases
Settlement gate for autonomous purchasing agent
“My shopping agent is about to settle an x402 payment it quoted 30 seconds ago — re-run the full live policy check right now to make sure the price still fits within my rolling budget and per-transaction cap before it commits.”
Detecting stale quotes mid-session
“The agent planned a payment during a price lookup but the session policy may have changed since then — can you run the re-authorization gate to check if the original quote still gets APPROVE or if we need to RE-QUOTE before touching funds?”
Enforcing category and merchant rules at pay time
“Before my agent pays this API vendor via x402, run the execution-time authorization check to confirm the merchant and category rules haven't blocked this spend and my session hasn't been paused or revoked.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/execution-time-quote-reauthorization-gate-for-ag?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent is operating on the x402 protocol and needs a real-time, policy-aware authorization gate at settlement time rather than relying on a price quote captured during planning. Prefer this over static pre-checks when session state, rolling budgets, or merchant/category rules may have changed between quote time and execution time. It is especially valuable for unattended agents with delegated spend authority where stale authorization could cause policy violations or overspending.
Side effects
- Quote does not clear rolling budget — returns BLOCK with explanation
- Session paused or revoked — returns BLOCK with revocation details
- Per-transaction cap exceeded — returns BLOCK
- Merchant or category rule violation — returns BLOCK
- Price has shifted since planning — returns RE-QUOTE with updated policy snapshot
- Payment not included or insufficient — returns 402 Payment Required
- Invalid or missing input parameters — returns error response
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": "execution-time-quote-reauthorization-gate-for-ag",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "execution-time-quote-reauthorization-gate-for-ag",
"provider": "K-2SO"
}
}Tags
x402
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