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Agent Payment Stack Selection Standard
x402
Agent Payment Stack Selection Standard is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-15).
Returns a decision procedure brief helping agents choose between programmable wallet custody, managed payment channels, or direct x402 for their payment stack.
Price / call$0.002
Success—
StatusUnknown
How this service works
Decision procedure for selecting an agent payment stack: programmable wallet custody, managed payment channel, or direct x402. Covers custody model, spend-control enforcement point, fee structure, receipt availability, and audit fit.
Output
A structured brief containing a prose decision procedure for selecting an agent payment stack, covering the custody model, spend-control enforcement point, fee structure, receipt availability, and audit fit. Also includes metadata like generation timestamp, service slug, model used, and generation source (llm, reasoning, or deterministic).
Example use cases
Choosing custody model for autonomous agent
“My agent needs to make micropayments autonomously — help me decide whether it should use a programmable wallet with custody controls or direct x402 payments, and explain how spend limits are enforced in each case.”
Audit-ready payment stack for enterprise agent
“We're building an enterprise AI agent that needs a full audit trail for every payment — walk me through the decision procedure to pick the right payment stack, focusing on receipt availability and audit fit.”
Fee structure comparison for high-frequency agent payments
“My agent will be making hundreds of small payments per day — can you run the decision procedure for selecting a payment stack and tell me which option between managed payment channels and direct x402 has the lowest fee structure for that volume?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-payment-stack-selection-standard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent or developer needs structured, authoritative guidance on selecting a payment stack architecture for AI agents, particularly when evaluating x402 direct payments versus custodied wallet models. Useful at design time or when an agent needs to self-select its own payment infrastructure based on spend-control requirements, fee sensitivity, or audit needs.
Side effects
- Payment required (HTTP 402) if no valid x402 payment is provided
- Invalid method returns error (only GET, HEAD, DELETE accepted)
- Invalid query parameter values for meta or topic fields may be rejected
- Service may be unavailable or return a non-OK result flag if the handler fails internally
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-stack-selection-standard",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "agent-payment-stack-selection-standard",
"provider": "K-2SO"
}
}Tags
x402
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