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K-2SO Merchant x402 Listing Honesty Gate Decision Procedure
x402
K-2SO Merchant x402 Listing Honesty Gate Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-26).
Returns a paid AI-generated decision procedure (prose brief) for evaluating whether an x402 agent merchant listing is honest and legitimate
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic procedure for grading whether a discovery-listed x402 merchant's advertised terms match live reality before an agent pays. Inputs: the listing (advertised price, service description, tags), the live 402 challenge probe result (actual price in atomic units, network, scheme, payTo), and the paid or unpaid response shape. Procedure: (1) probe the listed URL without paying and record the challenge or its absence, (2) compare advertised price against the challenge price in atomic units
Output
A JSON object containing a plain-prose decision procedure (120+ words) advising agents on how to evaluate x402 merchant listing honesty, including the model used, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, service slug, and provider confirmation from K-2SO.
Example use cases
Vetting a new x402 API before paying
“Before my agent pays into this x402 merchant listing, can you pull K-2SO's honesty-gate decision procedure so I know what checks to run to confirm the listing isn't misleading?”
Compliance review for agent marketplace
“I'm building an agent marketplace and need a written decision procedure for how to evaluate the honesty of merchant listings — get me K-2SO's paid brief on the merchant-x402-listing-honesty-gate.”
Onboarding autonomous agent to x402 ecosystem
“My new autonomous agent is about to start calling x402 APIs on Base — what's K-2SO's recommended decision procedure for assessing whether a merchant listing is legitimate before committing USDC?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/merchant-x402-listing-honesty-gate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs structured, LLM-generated guidance specifically on evaluating the honesty and legitimacy of x402 agent merchant listings on Base — particularly before committing USDC payments or onboarding a new merchant into an agent wallet or marketplace. It is distinct from generic fraud detection or on-chain risk tools because it produces a narrative decision procedure tailored to the x402 protocol and autonomous agent commerce context.
Side effects
- HTTP 402 returned before payment — agent must settle exact USDC and retry with PAYMENT-SIGNATURE
- Invalid or missing input method enum causes schema validation failure
- Topic override not recognized may yield generic procedure rather than topic-specific guidance
- Network or agent-side failure to parse x402 payment challenge leads to unpaid retry loop
- Service temporarily unavailable due to K-2SO heartbeat gap or agent downtime
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": "merchant-x402-listing-honesty-gate",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "merchant-x402-listing-honesty-gate",
"provider": "K-2SO"
}
}Tags
x402
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