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Agent Auditor
x402
Agent Auditor is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).
Performs a due-diligence audit of an x402/MPP merchant origin, probing its service catalog, capturing real 402 challenge details, checking security headers, and cross-referencing on x402scan, PayAI, and ScoutScore.
Price / call$0.02
Success—
StatusDown
How this service works
Due-diligence audit of any x402/MPP merchant origin on behalf of a paying agent: probes /api/discovery + service catalog, does an unpaid GET on a paid service to capture its real 402 PAYMENT-REQUIRED challenge (x402 version, resource, price), checks the free meta contract, records security headers, and cross-checks registration on x402scan, PayAI discovery and ScoutScore. SSRF-guarded; only public http(s) origins.
Output
Returns a structured audit report including: an overall boolean success flag, a numeric score, a natural-language summary, arrays of strengths and risk factors, a confidence rating, a timestamp, and an evidence object containing raw findings from the 402 challenge probe, meta contract check, security header scan, and cross-registration checks on x402scan, PayAI, and ScoutScore.
Example use cases
Vetting a new x402 merchant before payment
“Before I route any funds, can you audit the x402 merchant at https://api.someservice.io and give me its score, strengths, and any risk factors I should know about?”
Checking 402 challenge legitimacy
“I want to verify that the 402 PAYMENT-REQUIRED challenge from https://payments.merchantdomain.com is legitimate — can you probe it and show me the real x402 version, resource, and price it's demanding?”
Security header and registration cross-check
“Can you check whether https://marketplace.agentprovider.net is properly registered on x402scan and PayAI discovery, and also report its security headers so I know if it's safe to transact with?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-auditorWhen to prefer
Choose this endpoint when an AI agent needs to vet an unknown x402/MPP merchant before authorizing payment — particularly when cross-checking registration across x402scan and PayAI discovery, inspecting real 402 challenge parameters, or assessing security headers is required. Prefer it over manual probing when a structured risk score and evidence bundle are needed for automated payment-gating decisions.
Side effects
- SSRF guard blocks private/internal IP origins — only public http(s) URLs accepted
- Origin unreachable or times out — network error returned
- Discovery endpoint (/api/discovery) absent — partial audit with reduced score
- 402 challenge missing or malformed — evidence recorded but challenge fields empty
- x402scan or PayAI lookup failures — partial results with missing cross-check data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"service": "agent-auditor"
},
"service": "agent-auditor",
"provider": "K-2SO"
}
}Tags
x402
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