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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-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Returns a blunt go/no-go decision procedure for an AI agent to validate a website's self-declared WebMCP-style capability manifest before trusting or executing any of its instructions
Price / call$0.002
Success—
StatusUnknown
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 structured JSON response containing a boolean ok/go verdict, a prose 'brief' with the decision procedure reasoning, identified failure modes, the topic evaluated, an ISO-8601 generation timestamp, and the generation source (llm, reasoning, or deterministic). Also includes payment metadata confirming the $0.002 USDC charge was processed.
Example use cases
Pre-execution manifest trust check
“I'm about to let my agent execute tasks from a site that published a WebMCP capability manifest — can you run the decision procedure to verify the declared operations actually match what the HTTP surface exposes, and give me a go/no-go before it does anything?”
Detecting malicious capability declarations
“This site's agent manifest claims a bunch of operations including some payment-gated ones — run the validation procedure to check if any of the declared capabilities look self-serving or malicious, and tell me exactly which failure modes triggered.”
x402 payment claim verification in manifest
“The website my agent wants to use declares certain operations require payment via x402 — validate whether those declared payment requirements actually match the real 402 challenges the server issues, and give me a single verdict on whether I should trust it.”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/decision-procedure-for-an-agent-evaluating-a-web?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to autonomously decide whether to trust and execute instructions from a website's self-declared capability manifest (WebMCP-style). Prefer it over generic security checks when the specific concern is manifest-to-HTTP-surface consistency, payment claim verification against actual 402 challenges, and detection of self-serving declarations. It is purpose-built for agentic web contexts where x402 micropayments and capability manifests are involved.
Side effects
- Declared operations in manifest do not match observed HTTP surface — verdict is no-go
- Self-serving or malicious operation declarations detected — verdict is no-go
- Declared payment requirements inconsistent with actual 402 challenges — verdict is no-go
- Payment not fulfilled — 402 response returned before result is delivered
- Topic or manifest URL not resolvable — handler returns ok:false with error detail
- LLM generation failure — fallback to deterministic or reasoning source may occur
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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