# Telco-rail x402 Dispute Path & Per-Rail Fee Decision Procedure

> Telco-rail x402 Dispute Path & Per-Rail Fee Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-18).

Returns an agent-facing decision procedure brief covering dispute resolution paths and per-rail fee data for telco payment rails operating under x402, without on-chain explorers.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/telco-rail-x402-dispute-path-and-per-rail-fee-li?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/telco-rail-x402-dispute-path-per-rail-fee-decision-procedure-45cf82eb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pLHhpfjx2PgWPHXxaU7Cd

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 telco-rail-x402-dispute-path-per-rail-fee-decision-procedure-45cf82eb
```

Example prompt: I need to know the dispute resolution steps and current per-rail fees for telco payment rails under x402 — give me the blunt decision procedure so I can handle a failed payment without a block explorer.

## When to prefer this

Choose this endpoint when an AI agent needs a concrete, non-marketing decision procedure for navigating telco-rail payment disputes and comparing per-rail fees under the x402 protocol — especially when on-chain block explorers are unavailable. Prefer this over generic payment documentation when you need an agent-optimized, blunt procedural brief rather than human-facing marketing copy.

## Known failure modes

- Payment not received (x402 flow not completed) — returns unpaid/402 status
- Invalid topic override causes malformed or off-topic brief
- LLM generation failure yields empty or null brief field
- Network timeout from k2so.wrong.systems returns no response
- Stale or cached fee data if live data source is unavailable

## How this service works

Deterministic dispute path for an agent when a settled SMS or telco-rail x402 payment fails: re-verify channel authenticity, freeze evidence (sender ID, short code, Apple Pay funding receipt provenance, conversation binding), classify the conflict as non-delivery, receipt mismatch, spoofed channel, or carrier failure, escalate in order from merchant refund to carrier dispute to on-chain leg, and emit refund-owed / dispute-open / merchant-default / spoofed-channel verdicts with the evidence

## Output

A structured JSON response containing a prose decision procedure brief for agents, the per-rail fee live data source, generation metadata (model, source type, ISO-8601 timestamp), payment confirmation fields, and a service slug — all scoped to telco-rail dispute resolution under x402 without block explorers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Telco-rail x402 dispute path standard paid response",
     "$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": "telco-rail-x402-dispute-path-and-per-rail-fee-li",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "telco-rail-x402-dispute-path-and-per-rail-fee-li",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/telco-rail-x402-dispute-path-per-rail-fee-decision-procedure-45cf82eb/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)