# K-2SO Agent-Facing Single-Purpose Price Query & Micro-Transaction Decision Brief

> K-2SO Agent-Facing Single-Purpose Price Query & Micro-Transaction Decision Brief is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns a blunt decision procedure for how an AI agent should safely buy one small data point (price, quote, or fact) from an unfamiliar x402 endpoint, covering discovery, price honesty checks, spend cap sizing, and receipt binding.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/agent-facing-single-purpose-price-query-and-micr
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/k-2so-agent-facing-single-purpose-price-query-micro-transaction-fd979f88
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RznSB9HmD9CUYDxe4b21t

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-agent-facing-single-purpose-price-query-micro-transaction-fd979f88
```

Example prompt: Give me a blunt step-by-step decision procedure for safely buying a single price quote from an unfamiliar x402 endpoint — covering how to discover the endpoint, check whether the price is honest, size my spend cap, and bind the payment receipt.

## When to prefer this

Choose this endpoint when an AI agent needs a concrete, opinionated decision procedure for safely executing a one-time x402 micro-transaction — specifically around price honesty checks, spend cap sizing, and receipt binding. Prefer it over generic x402 documentation when you want a machine-readable, actionable brief rather than human-facing marketing copy, and when the agent is operating autonomously without prior registration with the data vendor.

## Known failure modes

- Payment not attached or insufficient — endpoint returns HTTP 402 with payment requirements
- Invalid HTTP method (only GET/HEAD/DELETE accepted) — returns 400 or schema validation error
- LLM generation failure — result.ok may be false with no brief returned
- Stale or cached generation — generatedAt timestamp may indicate outdated content
- Network or endpoint unavailability — k2so.wrong.systems unreachable

## How this service works

Paid agent-facing brief on agent-facing single-purpose price query and micro-transaction decision procedure: how an agent should safely buy one small data point (one price, one quote, one fact) from an unfamiliar x402 endpoint without registering, including endpoint discovery, price honesty check, spend cap sizing, and receipt binding · Build a decision procedure or schema for: agent-facing single-purpose price query and mi-0. Blunt decision procedure, not marketing.

## Output

A structured JSON response containing a 'brief' field with blunt prose decision procedure text, the topic slug, generation source (llm, reasoning, or deterministic), an ISO-8601 timestamp, and payment confirmation details including transaction hash and payer address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "agent-facing single-purpose price query and micro-transaction decision paid response",
     "$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/k-2so-agent-facing-single-purpose-price-query-micro-transaction-fd979f88/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)