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x402 Pricing-Scheme Selection Decision Procedure
x402
x402 Pricing-Scheme Selection Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-31).
Returns a blunt, agent-facing decision procedure for choosing between exact and upto x402 payment schemes for variable-cost services, including spend bounds, pre-auth vs post-settlement, refund handling, and scheme rejection criteria.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on x402 pricing-scheme selection for variable-cost services: an agent-facing decision procedure for choosing between exact (fixed quoted price) and upto (token-dependent estimate) 402 payment schemes, setting worst-case spend bounds for upto quotes, pre-authorization vs post-settlement reconciliation, refund handling, and when to reject upto in favor of exact.. Blunt decision procedure, not marketing.
Output
A structured response containing a prose decision procedure (brief) for agents, indicating how to select between exact and upto x402 payment schemes, configure spend bounds, handle pre-auth and post-settlement reconciliation, manage refunds, and when to reject upto in favor of exact. Also includes generation metadata: model used, generation source (llm/reasoning/deterministic), timestamp, and service slug.
Example use cases
Choosing scheme for LLM token-variable API
“I'm building an agent that calls a token-based LLM API over x402 and the cost varies per response — walk me through how to decide whether to use exact or upto pricing, and how to cap my worst-case spend.”
Pre-auth vs post-settlement reconciliation policy
“My agent needs a policy for when to pre-authorize x402 payments versus settling after the fact — give me the decision procedure for variable-cost services so I can hardcode the right logic.”
Handling refunds when upto quote overshoots
“What should my agent do when an upto x402 payment ends up costing less than the quoted maximum — walk me through the refund handling procedure and when to just reject upto entirely.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/x402-pricing-scheme-selection-for-variable-cost?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs an authoritative, blunt decision procedure for x402 payment scheme selection — specifically when building or auditing agent payment logic that must handle variable-cost services, upto pricing, spend caps, or reconciliation policies. Prefer over generic documentation when you need a machine-consumable, opinionated procedure rather than marketing copy.
Side effects
- Payment not included — returns 402 with payment requirements
- Invalid meta parameter value — ignored or schema-only response returned
- Service temporarily unavailable — provider downtime
- Topic override not recognized — falls back to default decision procedure topic
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": "x402-pricing-scheme-selection-for-variable-cost",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "x402-pricing-scheme-selection-for-variable-cost",
"provider": "K-2SO"
}
}Tags
x402
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