# Articles — Duplicate Attribute Values

> Articles — Duplicate Attribute Values is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Scans an HTML page or supplied HTML for article elements and finds duplicate values of a specified attribute within a given context term.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-articles-attribute-duplicates?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/articles-duplicate-attribute-values-1ae35bcd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BJOo-q25e7fPq0ah0kB1d

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 articles-duplicate-attribute-values-1ae35bcd -d '<json body>'
```

Example prompt: Check this page https://example.com/blog for any duplicate 'id' attribute values among article elements that match the term 'product', and tell me if the value 'sample' appears more than once.

## When to prefer this

Choose this endpoint when you need lightweight, static HTML parsing to detect duplicate attribute values specifically within article elements, without JavaScript rendering or login. It is ideal for quick SEO audits, content integrity checks, or pre-publish validation where the content is publicly accessible or can be supplied directly as HTML. Prefer it over full-site crawlers when you only need a single page scanned for a targeted attribute duplication check at minimal cost ($0.01 USDC).

## Known failure modes

- Invalid or unreachable URL returns an error with no parsed result
- HTML exceeding 100,000 characters is rejected
- Attribute name not matching the pattern ^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$ causes a validation error
- No article elements found on the page returns an empty or null result
- JavaScript-rendered content not captured since only static HTML parsing is used
- Payment not processed results in 402 response with no data returned

## How this service works

Articles — Duplicate attribute values: Duplicate attribute values for Articles. One public HTTPS page or supplied HTML; static parsing, no JavaScript rendering, login or access bypass. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded duplicate attribute values result.

## Output

Returns a bounded result indicating whether the specified attribute value appears more than once among article elements on the scanned page or HTML, including the duplicate occurrences found, their context, and comparison against previously seen attribute value texts.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "default": "",
   "maxLength": 2048
  },
  "html": {
   "type": "string",
   "default": "<!doctype html><html><head></head><body><article id=\"sample\" data-kind=\"example\">Example product guide</article></body></html>",
   "maxLength": 100000
  },
  "term": {
   "type": "string",
   "default": "product",
   "maxLength": 100,
   "minLength": 1
  },
  "attribute": {
   "type": "string",
   "default": "id",
   "pattern": "^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$",
   "maxLength": 50
  },
  "previous_texts": {
   "type": "array",
   "items": {
    "type": "string",
    "default": "",
    "maxLength": 1000
   },
   "default": [
    "Older example"
   ],
   "maxItems": 200,
   "minItems": 0
  },
  "attribute_value": {
   "type": "string",
   "default": "sample",
   "maxLength": 200
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/articles-duplicate-attribute-values-1ae35bcd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)