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Merchant x402 Listing Honesty Gate
x402
Merchant x402 Listing Honesty Gate is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Grades whether a discovery-listed x402 merchant's advertised terms (price, description, tags) match the live 402 challenge reality before an agent pays
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
Returns a structured verdict with an 'ok' boolean, a 'brief' prose explanation of the decision procedure, the generation source (llm/reasoning/deterministic), an ISO-8601 timestamp, and the service slug — indicating whether the merchant's advertised listing terms match the live 402 challenge reality
Example use cases
Pre-payment merchant integrity check
“I'm about to let my agent pay an x402 API listed on agentic.market — can you probe it first and verify the advertised price of $0.01 USDC matches what the live 402 challenge is actually demanding, and that the service description isn't misleading?”
Detecting bait-and-switch x402 listings
“This merchant showed up in the bazaar with a listed price of 100 atomic USDC units, but I want to make sure they're not pulling a bait-and-switch — run the honesty gate and tell me if the live 402 challenge price and payTo address match what was advertised.”
Automated agent payment safety gate
“My autonomous agent is evaluating a new x402 endpoint from a discovery listing — before it authorizes any payment, I need you to grade whether the advertised terms, network, and scheme match the live reality so we can decide if it's safe to proceed.”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/merchant-x402-listing-honesty-gateWhen to prefer
Use this endpoint when an AI agent has discovered an x402 merchant through a marketplace or directory (agentic.market, bazaar, etc.) and needs to verify listing accuracy before committing a payment. Prefer it over generic x402 payment safety checks when the specific concern is listing honesty — i.e., whether the advertised price and terms match the live 402 challenge — rather than scam detection or wallet risk preflight.
Side effects
- Listed URL does not return a 402 challenge (service may be down or not x402-enabled)
- Advertised price units are ambiguous or in different denominations making comparison unreliable
- Network or scheme mismatch cannot be resolved to a clear verdict
- Probe of live URL times out before challenge can be captured
- Missing required listing fields make comparison incomplete
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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