# Articles — Prior Text-Set Comparison

> Articles — Prior Text-Set Comparison 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).

Compares article text found at a URL or in supplied HTML against a set of prior texts to detect changes or differences

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-articles-compare?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-prior-text-set-comparison-c0b36aef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0rfhnKOG4iVBjtfO107W6

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-prior-text-set-comparison-c0b36aef -d '<json body>'
```

Example prompt: Check the article at https://example.com/news/article-1 — look for the article element with id 'main-content' and compare its current text against these two previous versions I have saved: 'Older draft text here' and 'Second older version here'. Tell me if the content has changed.

## When to prefer this

Use this endpoint when you need to compare the current text of a specific article element on a public, statically-rendered web page against a known set of prior texts — particularly for content change detection, editorial auditing, or lightweight content monitoring workflows. It is best suited for simple static HTML pages where no JavaScript rendering, authentication, or bot-bypass is needed. Choose it over general-purpose scrapers when you specifically want a bounded comparison result against prior text snapshots rather than raw extraction.

## Known failure modes

- URL is inaccessible, behind a login, or requires JavaScript rendering — static parser cannot retrieve content
- No article element matching the specified attribute and attribute_value is found in the page
- HTML exceeds 100,000 character limit
- previous_texts array exceeds 200 items
- URL exceeds 2048 character limit
- Page returns non-200 HTTP status
- Malformed or empty HTML supplied with no valid article content

## How this service works

Articles — Prior text-set comparison: Prior text-set comparison 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 prior text-set comparison result.

## Output

A bounded prior text-set comparison result indicating how the current extracted article text compares to the supplied set of previous texts, including match or difference signals for the identified article element

## 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-prior-text-set-comparison-c0b36aef/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)