# Pre-payment Purchase-Conformance Screening for x402 Agent Purchases

> Pre-payment Purchase-Conformance Screening for x402 Agent Purchases is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-23).

Classifies a merchant offer against jurisdiction restrictions, restricted-service flags, and spend-policy rules before x402 settlement, returning an allow/block/human-escalate verdict.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/pre-payment-purchase-conformance-screening-for-x?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pre-payment-purchase-conformance-screening-for-x402-agent-purchases-997dfb8d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__wEBN3hPe8CAsYkorSYlm

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 pre-payment-purchase-conformance-screening-for-x402-agent-purchases-997dfb8d
```

Example prompt: Before my agent pays this merchant offer for a data API subscription via x402, run a pre-payment conformance screen and tell me whether to allow the purchase, block it, or escalate to a human based on jurisdiction restrictions and spend-policy rules.

## When to prefer this

Use this endpoint when an autonomous agent needs a pre-payment compliance gate specifically within the x402 micropayment ecosystem — particularly when jurisdiction restrictions, restricted-service flags, or spend-policy enforcement are required before settlement. Prefer this over generic policy checks when the decision must be formatted as an actionable allow/block/human-escalate verdict that an agent can act on programmatically without human intervention.

## Known failure modes

- Missing or malformed topic parameter returns a generic or empty brief
- Payment not completed results in 402 response requiring x402 settlement before content is returned
- LLM generation failure may return an error in the result.ok field
- Ambiguous merchant offer description may produce an inconclusive or overly cautious verdict
- Network timeout on k2so.wrong.systems returns no verdict, blocking agent progress

## How this service works

Paid agent-facing brief on Pre-payment purchase-conformance screening for x402 agent purchases: classify a merchant offer against jurisdiction restrictions, restricted-service flags, and spend-policy rules BEFORE settlement, with a decision verdict agents can act on (allow / block / human-escalate). · Build a decision procedure or schema for: Pre-payment purchase-conformance screening for x402 agent purchases: classify a me. Blunt decision procedure, not marketing.

## Output

Returns a structured result containing a boolean success flag, a decision procedure brief (prose), the verdict (allow/block/human-escalate) encoded in the brief, the service slug, an ISO-8601 timestamp, and the generation source (llm/reasoning/deterministic). Also includes payment metadata (payer, transaction, selfPay flag).

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pre-payment-purchase-conformance-screening-for-x402-agent-purchases-997dfb8d/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)