# Table Captions — Empty Value Report

> Table Captions — Empty Value Report is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Parses an HTML page or supplied HTML string and reports which table caption elements have empty or missing values, optionally filtered by attribute and search term.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-captions-empty?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/table-captions-empty-value-report-a267b172
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6ndjNzbFNSmyuJ1sWwpvM

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-empty-value-report-a267b172 -d '<json body>'
```

Example prompt: Can you check this HTML page for any table captions that have empty or missing values, specifically looking at the 'id' attribute with value 'sample' and searching for the term 'product'? Here's the HTML: <!doctype html><html><body><table><caption id="sample"></caption></table></body></html>

## When to prefer this

Use this endpoint when you need a lightweight, static-parse audit of table caption emptiness in a known HTML document or public webpage. It is ideal for content QA pipelines, accessibility audits, and regression checks where JavaScript rendering is not required and you need a bounded, affordable ($0.01) single-call report scoped to caption elements specifically.

## Known failure modes

- URL is inaccessible or returns non-200 response — report cannot be generated
- HTML exceeds 100,000 character limit — request rejected
- Attribute pattern does not match required regex — validation error
- JavaScript-rendered content not captured — only static HTML is parsed
- No table captions found in HTML — empty result set returned
- Both url and html omitted — no content to parse

## How this service works

Table captions — Empty value report: Empty value report 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 empty value report result.

## Output

Returns a structured empty value report identifying which table caption elements in the parsed HTML have empty, blank, or missing text content, optionally scoped to a specific attribute name/value pair and filtered by a search term. The result includes details about the affected caption elements and any previously provided texts for comparison.

## 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-empty-value-report-a267b172/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)