# Table Header Cells — Duplicate Value Report

> Table Header Cells — Duplicate 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 2026-10-12).

Scans HTML table header cells (`<th>`) from a URL or raw HTML and returns a duplicate value report for a specified attribute or text term.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-table-headers-duplicates?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-header-cells-duplicate-value-report-a0ddb4be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9mIdJmgMX3QNBuxInfq2B

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-header-cells-duplicate-value-report-a0ddb4be -d '<json body>'
```

Example prompt: Check this HTML page at https://example.com/catalog for any duplicate 'id' attribute values among the table header cells — I want to know which th elements share the same id.

## When to prefer this

Choose this endpoint when you need to specifically detect duplicate attribute values or text content within HTML `<th>` (table header) elements, either from a live URL or raw HTML. It is purpose-built for header-cell duplicate detection with configurable attribute targeting, making it more precise than general HTML duplicate checkers. Prefer it for accessibility audits (duplicate ids), SEO checks, and data quality validation on HTML tables where static content is sufficient.

## Known failure modes

- URL is unreachable or returns non-200 status — parse fails with error
- HTML exceeds 100,000 character limit — request rejected
- Attribute name does not match pattern `^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$` — validation error
- No `<th>` elements found in the provided HTML — empty report returned
- JavaScript-rendered content not present — static parser misses dynamically generated headers
- Both url and html are empty — ambiguous input, likely error or empty result

## How this service works

Table header cells — Duplicate value report: Duplicate value report for Table header cells. 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 value report result.

## Output

A bounded duplicate value report listing table header (`<th>`) cells that contain repeated attribute values or text terms, including which values are duplicated and where they appear in the parsed HTML. Result is a single structured report object.

## 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><tbody><tr><th id=\"sample\">Example product guide</th></tr></tbody></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-header-cells-duplicate-value-report-a0ddb4be/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)