# Table Captions Word Frequency Analyzer

> Table Captions Word Frequency Analyzer is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Counts word frequency within HTML table caption elements from a URL or supplied HTML, optionally filtered by a specific term and attribute.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-captions-words?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/table-captions-word-frequency-analyzer-423e9b6d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R5S2EfP0LZ-ySo7VqvkqB

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 table-captions-word-frequency-analyzer-423e9b6d -d '<json body>'
```

Example prompt: Count how often the word 'product' appears in table captions on https://example.com/catalog — specifically look at the caption with id='sample' and compare against these previous caption texts: ['Older example'].

## When to prefer this

Choose this endpoint when you need static HTML parsing of table caption elements specifically for word frequency analysis. It is purpose-built for the <caption> tag scope, unlike general full-page word frequency tools. Ideal when you have a public HTTPS URL or raw HTML and want lightweight, low-cost ($0.01 USDC) term counting without JavaScript rendering or authentication.

## Known failure modes

- URL unreachable or returns non-200 status — parsing fails with no caption data
- No table caption elements found in the HTML — empty frequency result returned
- JavaScript-rendered captions not present in static HTML — missing content
- Term not found in any caption — zero-count result
- HTML exceeds 100,000 character limit — request rejected
- Invalid attribute name pattern — schema validation error
- URL exceeds 2048 character limit — request rejected

## How this service works

Table captions — Word frequency: Word frequency for Table captions. 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 word frequency result.

## Output

Returns a bounded word frequency result showing how often the specified term (or all words) appear within HTML table caption elements extracted from the provided URL or HTML content, optionally scoped to a specific attribute/value pair on the caption 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><table><caption id=\"sample\">Example product guide</caption><tr><td>value</td></tr></table></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/table-captions-word-frequency-analyzer-423e9b6d/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)