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WebMCP Capability Manifest Validation Decision Procedure
x402
WebMCP Capability Manifest Validation 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 2026-10-01).
Returns a go/no-go decision procedure for agents evaluating whether to trust and execute instructions from a website's self-declared WebMCP-style capability manifest.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on Decision procedure for an agent evaluating a website's self-declared agent operation interface (WebMCP-style capability manifest) before executing any instruction from it: validate declared operations against the observed HTTP surface, reject self-serving or malicious operation declarations, check declared payment requirements against actual 402 challenges, single go/no-go verdict with failure modes.-0. Blunt decision procedure, not marketing.
Output
A JSON object containing a boolean go/no-go verdict (ok), confirmation of payment (paid), and a result block with a plain-prose decision procedure (120+ words) covering validation of declared operations against the observed HTTP surface, rejection criteria for self-serving or malicious declarations, payment requirement verification, and enumerated failure modes. Also includes the model used, generation source, and ISO-8601 timestamp.
Example use cases
Vetting an unknown site's agent manifest
“I found a site that claims to have a WebMCP capability manifest exposing several operations for my agent to call — can you run the decision procedure to validate whether those declared operations actually match the site's HTTP surface and whether the payment claims are legit, then give me a go or no-go?”
Blocking a malicious operation declaration
“My agent is about to execute instructions from a third-party capability manifest but I'm worried some of the declared operations look self-serving or designed to manipulate my agent — run the validation procedure and tell me which ones to reject and why.”
Pre-execution safety check for x402 manifest
“Before my agent pays for and runs anything from this site's self-declared agent interface, check whether the declared x402 payment requirements actually match the real 402 challenges the server issues, and give me a clear pass or fail verdict with any failure modes listed.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/decision-procedure-for-an-agent-evaluating-a-web?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a structured, adversarial-aware decision procedure before trusting or executing any instruction from a website's self-declared capability manifest (WebMCP-style). It is purpose-built for the x402 agentic ecosystem and provides a blunt, non-marketing verdict with explicit failure modes — preferred over generic security checks when the specific threat model involves self-serving manifest declarations, mismatched HTTP surfaces, or fraudulent 402 payment claims.
Side effects
- Payment not provided — endpoint returns 402 requiring $0.002 USDC before delivering the brief
- Invalid or missing required input fields returns a validation error
- Topic override not recognized may fall back to default procedure
- LLM generation failure may result in deterministic fallback or error response
- Manifest URL not reachable or HTTP surface unresolvable at evaluation time
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": "decision-procedure-for-an-agent-evaluating-a-web",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "decision-procedure-for-an-agent-evaluating-a-web",
"provider": "K-2SO"
}
}Tags
x402
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