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Everyday Crypto Payment Authorization Procedure
x402
Everyday Crypto Payment Authorization 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 a decision procedure (plain-prose rules) for authorizing everyday micro-payments in crypto, covering float checks, merchant term validation, idempotency requirements, and double-pay risk detection.
Price / call$0.002
Success—
StatusDown
How this service works
Decision procedure for agents authorizing everyday micro-payments in crypto (coffee, subscriptions, data, agent services). Inputs: invoice amount, wallet float on the pay rail, merchant payment terms, previous pass-through rate on that merchant. Rules: reject if float is under 3x invoice on the chosen rail; reject if the merchant's advertised price is not inside the 402 terms; require an idempotency key for any retry; flag double-pay risk when settlement confirmation is not verifiable before
Output
A JSON response containing a plain-prose decision procedure (120+ words) explaining whether to authorize the payment, which conditions passed or failed (float check, merchant term match, idempotency key requirement, double-pay risk), plus metadata like generation source, timestamp, model used, and a boolean success indicator.
Example use cases
Micro-payment safety check before coffee purchase
“My agent is about to pay a 1.50 USDC coffee charge via x402. My wallet float on that rail is 3.80 USDC and the merchant's 402 terms match the advertised price. Should I authorize it, or is the float too thin?”
Subscription renewal authorization with retry logic
“My AI agent failed to pay a 5 USDC monthly subscription last attempt and needs to retry — give me the authorization procedure so it knows what idempotency key to include and whether the float of 18 USDC is sufficient before it tries again.”
Double-pay risk check for unconfirmed settlement
“My agent sent a 2 USDC payment to a data vendor on the x402 rail but settlement confirmation hasn't come back yet, and it's about to retry — run the everyday payment authorization procedure to tell me if there's a double-pay risk before it commits the second transaction.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/everyday-crypto-payment-authorization-procedure?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs a structured, rule-based decision before executing any small everyday crypto payment (coffee, data purchase, subscription, agent service) over the x402 protocol. Prefer it over generic payment validation when you specifically need float adequacy checks, merchant-term matching against 402 payment headers, idempotency enforcement for retries, and double-pay risk flagging in a single procedure call.
Side effects
- Float below 3x invoice amount — procedure returns rejection with float-inadequacy reason
- Merchant advertised price does not match 402 terms — procedure flags mismatch and rejects
- Settlement confirmation not verifiable before commit — procedure flags double-pay risk
- Missing idempotency key on retry — procedure requires key before approving
- Upstream LLM/reasoning engine unavailable — may return service error or degraded response
- Invalid or missing query parameters — returns schema validation 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": "everyday-crypto-payment-authorization-procedure",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "everyday-crypto-payment-authorization-procedure",
"provider": "K-2SO"
}
}Tags
x402
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