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Agent Payment Retry and Idempotency Decision Procedure (x402)
x402
Agent Payment Retry and Idempotency Decision Procedure (x402) is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-09-13).
Returns a blunt, agent-facing decision procedure for handling x402 payment failures, timeouts, ambiguous settlement states, and post-payment errors — covering retry budgets, idempotency keys, duplicate-settlement detection, and refund-vs-abandon logic.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on Agent payment retry and idempotency decision procedure: when an x402 payment attempt fails, times out, returns ambiguous settlement state, or the paid call errors after payment, decide whether to retry, refund-path, or abandon. Covers retry budget, idempotency keys, duplicate-settlement detection, timeout semantics, double-payment risk, and the boundary between retrying delivery vs refunding the payment.. Blunt decision procedure, not marketing.
Output
A prose decision procedure brief (and structured fields) covering: whether to retry, refund-path, or abandon a failed/ambiguous x402 payment; retry budget recommendations; idempotency key semantics; how to detect duplicate settlements; timeout handling; double-payment risk boundaries; and the distinction between retrying delivery versus refunding the payment. Also includes generation metadata (model, timestamp, generation source).
Example use cases
Handling ambiguous settlement after timeout
“My agent sent an x402 payment but the response timed out before I got confirmation — I don't know if USDC left the wallet or not. What's the correct procedure: retry, check settlement state first, or abandon?”
Avoiding double-payment on retry
“An x402 payment went through but the downstream API call returned a 500 error. Should I retry the whole thing including the payment, or is there a way to retry just the delivery without paying again?”
Setting retry budget for payment loop
“I'm building an agent that makes x402 payments in a loop and I need to know how many retries are safe, what idempotency keys to use, and at what point I should give up and flag the payment for review instead of retrying.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-payment-retry-and-idempotency-decision-proWhen to prefer
Choose this endpoint when an AI agent needs authoritative, blunt procedural guidance specifically for x402 payment error scenarios — particularly ambiguous settlement, timeouts, duplicate-payment risk, and idempotency key management. Prefer this over general payment documentation when the agent must make an autonomous real-time decision about retrying, refunding, or abandoning a failed x402 USDC payment on Base.
Side effects
- Payment required (402) if USDC payment not attached — must pay $0.002 USDC per call
- Topic override not recognized — returns default procedure without topic customization
- Service unavailable or timeout on the k2so.wrong.systems host
- Ambiguous or stale generation if generationSource is 'deterministic' rather than 'llm' or 'reasoning'
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-payment-retry-and-idempotency-decision-pro",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "agent-payment-retry-and-idempotency-decision-pro",
"provider": "K-2SO"
}
}Tags
x402
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