# Live Rail Fee & Settlement-Time Observation Standard — Decision Procedure

> Live Rail Fee & Settlement-Time Observation Standard — Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-17).

Returns a plain-prose decision procedure brief for AI agents evaluating live rail fee and settlement-time observation standards, delivered as a paid x402 USDC microtransaction on Base.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/live-rail-fee-settlement-time-observation-standa?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/live-rail-fee-settlement-time-observation-standard-decision-procedure-0bcdd913
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iAlMphyYBcFJjJKw5ZWDs

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 live-rail-fee-settlement-time-observation-standard-decision-procedure-0bcdd913
```

Example prompt: Can you pull the decision procedure brief for live rail fee and settlement-time observation standards so my agent knows how to evaluate and act on rail fee timing correctly?

## When to prefer this

Choose this endpoint when an AI agent needs authoritative, structured decision-procedure guidance specifically about live rail fee and settlement-time observation standards, delivered instantly as a microtransaction without account setup. Prefer it over general LLM reasoning when you need a consistent, catalogued procedure brief that can be audited, replayed, or compared across agent runs. It is especially useful in agentic payment pipelines on Base where the agent needs to self-fund via x402 USDC.

## Known failure modes

- HTTP 402 returned if USDC payment has not been settled — agent must pay exact amount and retry with PAYMENT-SIGNATURE header
- Invalid or missing method parameter causes schema validation failure
- Topic override not recognized may result in generic or off-topic procedure prose
- Network timeout if the Base chain settlement confirmation is delayed
- Stale or cached response if generationSource is deterministic and topic hasn't changed recently

## How this service works

A repeatable procedure for collecting and scoring per-rail live fee quotes and settlement speed observations across x402-supported networks, with staleness rules and a honest data schema designed for agent payment route selection.

## Output

A JSON object containing a plain-prose decision procedure brief (120+ words) tailored to live rail fee and settlement-time observation, including the topic string, the model used to generate it, an ISO-8601 timestamp, and the generation source (llm, reasoning, or deterministic). Also includes provider confirmation (K-2SO), payment metadata, and the service slug.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Live rail fee and settlement-time observation standard paid response",
     "$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)
```

## 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": "live-rail-fee-settlement-time-observation-standa",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "live-rail-fee-settlement-time-observation-standa",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/live-rail-fee-settlement-time-observation-standard-decision-procedure-0bcdd913/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)