# Definition Lists — Adjacent Word-Pair Frequency

> Definition Lists — Adjacent Word-Pair Frequency is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Extracts adjacent word-pair (bigram) frequencies from HTML definition list elements on a given webpage or supplied HTML snippet.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-definition-lists-bigrams?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/definition-lists-adjacent-word-pair-frequency-a25603a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YZGFWWWcSx9MSYwtRou4G

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 definition-lists-adjacent-word-pair-frequency-a25603a0 -d '<json body>'
```

Example prompt: Can you analyze the definition list with id 'glossary' on https://example.com/product-guide and tell me the adjacent word-pair frequencies for the term 'product'?

## When to prefer this

Choose this endpoint when you need to statistically analyze adjacent word-pair (bigram) frequencies specifically within HTML definition list (`<dl>`) elements, either from a live public URL or a supplied HTML string. It is ideal for NLP preprocessing, SEO analysis, content auditing, or glossary mining tasks where the structure of interest is a definition list. Prefer this over generic text extraction tools when you specifically need bigram-level statistics scoped to `<dl>` elements rather than full-page text.

## Known failure modes

- URL is inaccessible, paywalled, or returns non-200 status — no content parsed
- No definition list element matching the specified attribute/value found in the HTML — empty or null result
- HTML content exceeds 100,000 character limit — request rejected
- JavaScript-rendered content not captured since only static parsing is performed
- Term not found in the definition list — zero or minimal frequency results
- Malformed HTML prevents accurate parsing — incomplete or incorrect bigrams returned

## How this service works

Definition lists — Adjacent word-pair frequency: Adjacent word-pair frequency for Definition lists. 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 adjacent word-pair frequency result.

## Output

Returns a bounded result containing adjacent word-pair (bigram) frequency counts extracted from the matching definition list element on the specified page or HTML input. Includes counts of how often each two-word sequence appears consecutively within the definition list text, scoped to the identified 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><dl id=\"sample\" data-kind=\"example\">Example product guide</dl></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/definition-lists-adjacent-word-pair-frequency-a25603a0/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)