# Cardano x402 Offer Vetting and Adoption Decision Procedure

> Cardano x402 Offer Vetting and Adoption Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-21).

Generates a decision procedure brief helping agents evaluate whether an x402 offer genuinely supports ADA settlement or is merely marketing association with Cardano Foundation.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/cardano-x402-offer-vetting-and-adoption-decision?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cardano-x402-offer-vetting-and-adoption-decision-procedure-704dfa22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aN7-747Z-A9VsBtySJBL_

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 cardano-x402-offer-vetting-and-adoption-decision-procedure-704dfa22
```

Example prompt: Give me a decision procedure for evaluating an x402 offer that claims Cardano support — I need to know how to separate real ADA settlement capability from membership marketing and what adoption thresholds to use.

## When to prefer this

Use this endpoint when an AI agent needs structured guidance specifically for evaluating x402 payment offers that claim Cardano or ADA settlement capability, especially to distinguish genuine blockchain integration from Cardano Foundation membership marketing. Prefer this over general x402 offer comparison tools when the Cardano-specific dimension — ADA settlement authenticity, on-chain verification thresholds, or Cardano Foundation association claims — is the key decision variable.

## Known failure modes

- Payment not made — returns metadata or 402 payment-required response instead of decision brief
- Invalid method — only GET, HEAD, DELETE are accepted; POST or PUT returns error
- Topic override may produce off-topic or misaligned decision procedure if poorly scoped
- LLM generation failure — generationSource may fall back or result may be incomplete
- Service unavailable at wrong.systems domain — network or provider outage

## How this service works

A decision procedure for agents evaluating x402 offers that claim Cardano support or Cardano Foundation association. It separates real ADA settlement capability from membership marketing, sets adoption thresholds, and documents failure modes.

## Output

A prose decision procedure brief tailored to Cardano x402 offer evaluation, including criteria distinguishing genuine ADA settlement from marketing claims, recommended adoption thresholds, and documented failure modes. The response includes metadata such as the generation source (llm, reasoning, or deterministic), a timestamp, and the service slug.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cardano-x402-offer-vetting-and-adoption-decision-procedure-704dfa22/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)