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x402 Challenge Conformance Grading – URL Payment Surface Scorer
x402
x402 Challenge Conformance Grading – URL Payment Surface Scorer is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-31).
Returns a blunt decision procedure for scoring any URL's x402 payment surface across scheme registration, network, price declaration, and settlement viability before committing a first payment.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on x402 challenge conformance grading: how an agent scores any URL's payment surface (scheme registration, network, price declaration, settlement viability) before committing first payment · Build a decision procedure or schema for: x402 challenge conformance grading: how an agent scores any URL's payment surface (scheme registration, network, price declaration, settlement viability) before committin-0. Blunt decision procedure, not marketing.
Output
A paid brief containing a blunt, prose decision procedure for grading an x402 URL's payment surface. Covers scheme registration validity, network identification, price declaration correctness, and settlement viability checks. Response includes a 'brief' field with the actionable procedure text, a 'procedure' field, generation metadata (model, generatedAt, generationSource), and standard x402 payment confirmation fields (payer, transaction).
Example use cases
Pre-payment x402 surface audit
“Before I let my agent pay any new x402 endpoint, I want a scoring rubric that checks scheme registration, declared network, price fields, and settlement viability — give me the decision procedure so I know exactly what to grade.”
Building an x402 conformance validator
“I'm building an agent that auto-pays x402 services and I need a structured grading schema it can run against any URL's payment surface to flag non-conformant ones before committing funds.”
Debugging a malformed x402 challenge
“My agent got an x402 challenge response from a new vendor but something looks off — walk me through the conformance grading steps so I can figure out whether the scheme registration, price declaration, or settlement fields are the problem.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/x402-challenge-conformance-grading-how-an-agent?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an autonomous agent needs a pre-payment conformance gate for x402-gated URLs — specifically when you need a structured scoring rubric covering all four pillars (scheme, network, price, settlement) rather than a generic payment health check. Prefer it over ad-hoc inspection when building repeatable agent payment pipelines or when debugging malformed x402 challenge responses from unknown vendors.
Side effects
- Payment not completed — returns HTTP 402 with challenge rather than graded brief
- Invalid or missing 'input.type' or 'input.method' fields — schema validation error
- Topic override not recognized — may fall back to default grading procedure
- LLM generation failure — generationSource may reflect fallback or error state
- Network or provider downtime — HTTP 5xx response
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": "x402-challenge-conformance-grading-how-an-agent",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "x402-challenge-conformance-grading-how-an-agent",
"provider": "K-2SO"
}
}Tags
x402
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