# Facilitator Volume-Claim Audit Procedure (XRPL x402)

> Facilitator Volume-Claim Audit Procedure (XRPL x402) is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Returns a paid AI-generated decision procedure for verifying a payment facilitator's self-reported settlement count against on-chain evidence on XRPL x402 rails.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/facilitator-volume-claim-audit-procedure-how-an?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/facilitator-volume-claim-audit-procedure-xrpl-x402-f11ee28f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W0RS2dSxi0whfDj-_mK8y

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 facilitator-volume-claim-audit-procedure-xrpl-x402-f11ee28f
```

Example prompt: I need the step-by-step decision procedure for auditing an x402 payment facilitator's self-reported settlement count — including sampling windows, per-rail counting rules, and how to reach a final verdict based on on-chain XRPL evidence.

## When to prefer this

Choose this endpoint when an AI agent needs a structured, blunt decision procedure for auditing x402 facilitator volume claims specifically on XRPL rails — particularly when evaluating near-2M transaction claims with sampling-based on-chain verification. Prefer this over generic blockchain explorers or manual audit approaches when you need a ready-to-execute procedure with per-rail counting rules and a clear verdict framework delivered as prose.

## Known failure modes

- Payment not received: endpoint returns 402 requiring USDC payment before content is delivered
- Invalid method: non-GET/HEAD/DELETE requests are rejected per schema
- Topic override malformed: unsupported topic string may result in fallback to default procedure
- LLM generation failure: generationSource may fall back to deterministic mode if model is unavailable
- Rate limiting or service unavailability from k2so.wrong.systems host

## How this service works

Paid agent-facing brief on facilitator volume-claim audit procedure: how an agent verifies a payment facilitator's self-reported settlement count (XRPL x402 facilitator near 2M AI agent transactions) against on-chain evidence, with sampling windows, per-rail counting rules, and a verdict-0. Blunt decision procedure, not marketing.

## Output

A paid JSON response containing prose decision procedure text (120+ words) describing how to audit a facilitator's volume claim, including sampling window methodology, per-rail counting rules, and a verdict framework. Also includes generation metadata such as model name, timestamp, generation source, and service slug.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "facilitator volume-claim audit procedure: how an agent verifies a paym paid response",
     "$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)
```

## Response schema (JSON Schema)

```json
{
 "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": "facilitator-volume-claim-audit-procedure-how-an",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "facilitator-volume-claim-audit-procedure-how-an",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/facilitator-volume-claim-audit-procedure-xrpl-x402-f11ee28f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)