# Opaque Settlement Proof Decision Procedure

> Opaque Settlement Proof 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 2026-09-13).

Returns a structured decision procedure for agents that received an unverifiable x402 settlement receipt, covering opacity scoring, verdict tiers, corrective proof standards, and escalation thresholds.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-facing-decision-procedure-for-opaque-or-un
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/opaque-settlement-proof-decision-procedure-e9c09cd9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iSnCkxeIBJWxR5xIIVgWT

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability opaque-settlement-proof-decision-procedure-e9c09cd9
```

Example prompt: I just paid an x402 endpoint and got back a settlement receipt with only a private-ledger claim and no verifiable transaction hash — walk me through the decision procedure: should I accept it, request corrective proof, escalate, or blacklist that provider?

## When to prefer this

Use this endpoint when your agent has already completed an x402 payment and received a settlement receipt that cannot be independently verified on-chain, and needs a structured, tiered decision framework to determine next steps. Prefer this over generic dispute or recovery procedures when the core question is proof opacity and verification credibility rather than post-settlement technical failures (timeouts, malformed responses).

## Known failure modes

- Payment required but not provided — returns 402 with payment instructions
- Invalid or missing query parameters — returns error with schema guidance
- LLM generation failure — result may be empty or partial
- Topic override not recognized — falls back to default procedure
- Service temporarily unavailable — HTTP 5xx

## How this service works

Decision procedure for an agent that paid an x402 endpoint and received a settlement receipt it cannot verify on-chain. Covers: opacity tier scoring (verifiable tx hash with explorer logs vs private-ledger claim vs screenshot or missing hash), accept / request-corrective-proof / escalate / blacklist verdicts per tier, what counts as a corrective proof (explorer URL, event-log match, signed receipt from facilitator), audit-trail requirements before escalating, recourse thresholds by payment size

## Output

A prose decision-procedure brief covering: opacity tier scoring for the received proof, verdict recommendation (accept, request-corrective-proof, escalate, or blacklist), what qualifies as valid corrective proof (explorer URL, event-log match, signed facilitator receipt), audit-trail steps required before escalating, and recourse thresholds calibrated to payment size.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Opaque Settlement Proof Decision Procedure paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         "type": "string"
        },

… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/opaque-settlement-proof-decision-procedure-e9c09cd9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so-8080.on.ascii.dev](https://www.zero.xyz/host/k2so-8080.on.ascii.dev/llms.txt)