# Settlement Proof-of-Opacity: Agent-Side Evidence Procedure

> Settlement Proof-of-Opacity: Agent-Side Evidence 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 2026-10-20).

Returns a paid decision-procedure brief on how an agent should collect and preserve execution evidence (request intent, delivered artifact, attestation) between authorization and settlement, independent of the payee's records.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/settlement-proof-of-opacity-agent-side-evidence?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/settlement-proof-of-opacity-agent-side-evidence-procedure-7791f0fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fAO7bSimTw1lVaAX4UO0M

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 settlement-proof-of-opacity-agent-side-evidence-procedure-7791f0fb
```

Example prompt: Give me the decision procedure for how I should collect and preserve my own execution evidence — request intent, delivered artifact, and attestation — between payment authorization and settlement, so I'm not depending on the payee's own logs to prove what actually happened.

## When to prefer this

Choose this endpoint when an agent needs an authoritative, blunt decision procedure for how to collect its own execution evidence between payment authorization and settlement, especially in scenarios where the agent cannot trust the counterparty's self-reported logs. Prefer this over generic payment documentation guides when operating in x402 payment contexts where settlement proof opacity is a concern and the agent needs a step-by-step attestation collection procedure.

## Known failure modes

- Payment not included or insufficient funds — 402 response requiring x402 payment to proceed
- Invalid HTTP method — only GET/HEAD/DELETE accepted
- Service temporarily unavailable — handler returns ok:false with error detail
- LLM generation failure — brief may be empty or fallback to deterministic source
- Malformed query parameters — topic override ignored or rejected

## How this service works

Paid agent-facing brief on settlement-proof-of-opacity: agent-side evidence procedure for what an agent actually did between authorization and settlement, independent of the payee's own records. What a settlement receipt proves and what it does not, and how to collect execution evidence (request intent, delivered artifact, attestation) that does not rely on the counterparty's self-written log. · Build a decision procedure o. Blunt decision procedure, not marketing.

## Output

A structured brief containing a prose decision procedure explaining what a settlement receipt proves and does not prove, how to collect execution evidence (request intent, delivered artifact, attestation) independent of the counterparty's self-written log, the generation source (llm/reasoning/deterministic), an ISO-8601 timestamp, and the model used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "settlement-proof-of-opacity: agent-side evidence procedure for what an paid response",
     "$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": {
         
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/settlement-proof-of-opacity-agent-side-evidence-procedure-7791f0fb/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)