# K-2SO x402 Grade-Pay-Recover Orchestration Brief

> K-2SO x402 Grade-Pay-Recover Orchestration Brief is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-15).

Returns a paid decision-procedure brief that sequences pre-payment conformance grading, expired-challenge re-probe, and failure classification into one end-to-end grade-pay-recover flow for a single x402 merchant call.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/orchestration-procedure-that-sequences-the-merch?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/k-2so-x402-grade-pay-recover-orchestration-brief-580888c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VDtg_WRWSqXRSl0M5dfcp

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 k-2so-x402-grade-pay-recover-orchestration-brief-580888c5
```

Example prompt: Walk me through the full grade-pay-recover orchestration procedure for a single x402 merchant call — including how to handle pre-payment conformance grading, what to do when a challenge expires and I need to re-probe, and how to classify and recover from payment failures.

## When to prefer this

Choose this endpoint when your agent needs a single, authoritative decision procedure that covers the full x402 merchant-lane lifecycle — grading, payment, and failure recovery — in one call rather than piecing together separate guides. It is especially useful when building or debugging an x402 payment client that must handle edge cases like expired challenges and ambiguous failure codes. Prefer it over generic x402 documentation when you need a blunt, agent-optimized procedure rather than marketing prose.

## Known failure modes

- Payment not included or insufficient — returns 402 with challenge; agent must pay $0.002 USDC to receive brief
- Invalid HTTP method supplied — schema requires GET/HEAD/DELETE, POST will be rejected
- Topic override not recognized — may return generic orchestration brief rather than topic-specific one
- LLM generation failure — generationSource may fall back to deterministic or cached result
- Network timeout on k2so.wrong.systems — endpoint may be intermittently unavailable on this experimental domain

## How this service works

Paid agent-facing brief on Orchestration procedure that sequences the merchant-quality lane end to end: pre-payment conformance grading (305), expired-challenge re-probe and safe re-payment (306), and failure cause classification with recovery (304) into one grade-pay-recover flow for a single paid x402 call.. Blunt decision procedure, not marketing.

## Output

Returns a structured JSON object containing a prose 'brief' field with the full decision procedure for sequencing conformance grading (305), expired-challenge re-probe (306), and failure classification with recovery (304) into one grade-pay-recover flow. Also includes service slug, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, topic, and payment transaction metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Orchestration procedure that sequences the merchant-quality lane end t paid response",
     "$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": "orchestration-procedure-that-sequences-the-merch",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "orchestration-procedure-that-sequences-the-merch",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/k-2so-x402-grade-pay-recover-orchestration-brief-580888c5/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)