# RWA Data Feed Selection & Source Vetting Brief (K-2SO)

> RWA Data Feed Selection & Source Vetting Brief (K-2SO) 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).

Returns a paid AI-generated decision procedure helping agents choose, vet, and rank tokenized-asset (RWA) price/valuation data feeds, including CoinMarketCap's new RWA endpoints.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/rwa-data-feed-selection-and-source-vetting-coinm?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/rwa-data-feed-selection-source-vetting-brief-k-2so-b7b33e40
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VNdI9JP8CqJXFi00Gmxa_

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 rwa-data-feed-selection-source-vetting-brief-k-2so-b7b33e40
```

Example prompt: I'm building an agent that needs to pull tokenized stock and real estate prices — can you give me a decision procedure for when to use CoinMarketCap's new RWA endpoints, how to vet feed quality and settlement asset authenticity, and how to rank free vs paid sources with freshness thresholds?

## When to prefer this

Use this endpoint when an agent needs authoritative, up-to-date guidance on selecting and vetting RWA/tokenized-asset price feeds — especially when integrating CoinMarketCap's new RWA endpoints. Prefer this over generic documentation searches when you need a structured decision procedure with quality ranking, authenticity vetting, and freshness thresholds in a single callable brief.

## Known failure modes

- Payment not provided or insufficient — endpoint returns 402 with payment instructions
- Invalid query parameter values — schema validation error
- Service temporarily unavailable on k2so.wrong.systems — network/timeout error
- LLM generation failure — result.ok may be false with empty brief
- Topic override not recognized — fallback to default procedure topic

## How this service works

Paid agent-facing brief on RWA data feed selection and source vetting: CoinMarketCap added 7 tokenized-asset endpoints (stocks, commodities, real estate) alongside spot, derivatives and DEX, all with x402 payment support and 53M tracked assets. Build a decision procedure for an agent that needs a tokenized-asset price or valuation feed: when to use the new RWA endpoints, how to vet feed quality and settlement asset authenticity, free-vs-paid source ranking, freshness thresholds, and when to

## Output

A detailed prose decision procedure (brief) covering: when to use CoinMarketCap's 7 new RWA tokenized-asset endpoints (stocks, commodities, real estate), how to vet feed quality and settlement asset authenticity, free-vs-paid source ranking logic, freshness/staleness thresholds, and edge cases where the agent should fall back or escalate. Also returns service slug, generation timestamp, model used, and generation source (llm/reasoning/deterministic).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "RWA data feed selection and source vetting: CoinMarketCap added 7 toke paid response",
     "$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": "rwa-data-feed-selection-and-source-vetting-coinm",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "rwa-data-feed-selection-and-source-vetting-coinm",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rwa-data-feed-selection-source-vetting-brief-k-2so-b7b33e40/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)