# Data-Acquisition Endpoint Pre-Payment Contract Check

> Data-Acquisition Endpoint Pre-Payment Contract Check is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).

Returns a paid, LLM-generated decision procedure for evaluating agent-facing data-acquisition endpoints: honest schema verification, smoke-test contract validation, and price honesty checks to differentiate legitimate endpoints from weak 404 merchants.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/agent-facing-data-acquisition-procedure-with-hon?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/data-acquisition-endpoint-pre-payment-contract-check-9bd8b0c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BdSXDiULtPw3xJDQ1ILk3

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 data-acquisition-endpoint-pre-payment-contract-check-9bd8b0c5
```

Example prompt: I need a decision procedure for evaluating whether an agent-facing data-acquisition endpoint has an honest schema and legitimate pricing — something that tells me how to smoke-test the contract and spot weak 404 merchants before committing payment.

## When to prefer this

Choose this endpoint when an agent needs a structured, blunt decision procedure for evaluating the trustworthiness of agent-facing data-acquisition endpoints — specifically when verifying schema honesty, smoke-testing contracts, and assessing price legitimacy in x402 ecosystems. Prefer it over generic API validation tools when the context is x402-native agent payments and the concern is distinguishing legitimate data merchants from weak 404 providers. Best suited for autonomous agents running pre-payment due diligence workflows.

## Known failure modes

- Endpoint returns 402 if payment is not attached — agent must attach x402 payment header
- If meta=1 is set, returns free metadata JSON without payment and without the full decision procedure
- LLM generation failure may result in ok:false with no brief returned
- Invalid or unsupported HTTP method returns an error (only GET, HEAD, DELETE allowed)
- Network or provider outage at k2so.wrong.systems results in connection failure with no fallback
- Topic override not recognized may produce a generic rather than topic-specific procedure

## How this service works

Paid agent-facing brief on agent-facing data-acquisition procedure with honest schema, smoke-verified contract, and price honesty, differentiated from weak 404 merchants · Build a decision procedure or schema for: agent-facing data-acquisition procedure with honest schema, smoke-verified contract, and price honesty, differentiated from weak 404 merchants. Include inputs, thresholds, failure modes. Falsifier: If free docs al-0. Blunt decision procedure, not marketing.

## Output

A JSON object containing a plain-prose decision procedure (120+ words) for agent-side evaluation of data-acquisition endpoints, including schema honesty checks, smoke-test contract verification steps, price honesty thresholds, and failure mode descriptions. Also returns the generation model, topic, service slug, ISO-8601 timestamp, and generation source (llm, reasoning, or deterministic). The 'paid' flag confirms successful x402 payment processing.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/data-acquisition-endpoint-pre-payment-contract-check-9bd8b0c5/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)