# Pre-Trade Cost Commitment Verification Standard

> Pre-Trade Cost Commitment Verification Standard is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-31).

Deterministically verifies that a financial analysis or quote purchase via x402 v2 payments is price-conformant, token/network-valid, fresh, and settlement-bound before influencing any trade decision.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/pre-trade-cost-commitment-verification-for-marke?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pre-trade-cost-commitment-verification-standard-4c8f3563
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xCjKREa1eqBfcjPlTpCfw

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-trade-cost-commitment-verification-standard-4c8f3563
```

Example prompt: Before we act on this market analysis I just bought over x402, run the pre-trade cost commitment verification — check that the price charged matches the quote, the token and network are correct, the quote is still fresh, and the settlement is bound to this exact purchase. Give me a pass, conditional pass, or refusal with the specific failing check named.

## When to prefer this

Use this endpoint when an AI agent is about to act on financial analysis or a market quote that was purchased via x402 v2 payments, and you need a deterministic, auditable gate — not a probabilistic heuristic — before the purchased content influences any trade decision. Prefer this over generic payment validators when you specifically need offered-vs-charged price conformance, token/network validation against the quote, quote freshness enforcement, and settlement-evidence binding all checked atomically in one call, and you need a named failing check for auditability rather than just a boolean result.

## Known failure modes

- Price mismatch between offered and charged amount — returns refusal with 'price-conformance' check named
- Token or network in payment does not match the quote — returns refusal with 'token-network' check named
- Quote has exceeded freshness limits — returns refusal with 'quote-freshness' check named
- Settlement evidence not bound to the exact purchase — returns refusal with 'settlement-binding' check named
- Payment not detected or unpaid — returns 402 response requiring payment before verification proceeds
- Malformed input parameters — returns validation error

## How this service works

Deterministic procedure for agents that buy financial analysis or quotes over x402 v2 payments before the analysis may influence a trade decision. Covers: offered-versus-charged price conformance, token and network checks against the quote, quote freshness limits, and settlement-evidence binding to the exact purchase. Outputs a pass, a conditional pass with evidence, or a refusal with the failing check named. Run before paying, not after.

## Output

Returns a JSON object with a boolean 'ok' field, a 'paid' flag, and a 'result' object containing: a boolean success indicator, a 'brief' string with decision procedure prose for agents, the service slug, the topic, generation source (llm/reasoning/deterministic), and an ISO-8601 timestamp. On failure, the specific failing check is named. The verdict is one of: pass, conditional pass with evidence, or refusal.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pre-trade-cost-commitment-verification-standard-4c8f3563/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)