# HTML Explicit Table Header Binding Detector

> HTML Explicit Table Header Binding Detector is a paid API for AI agents from detect.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-21).

Given a URL, identifies the effective explicit header-cell relationship in an HTML table after document-first ID lookup, table membership filtering, empty-cell exclusion, and self-exclusion — without exposing table content.

## Facts

- Endpoint: POST https://detect.halowerk.com/u/html-explicit-table-header-binding?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/html-explicit-table-header-binding-detector-03eb08dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Nc60ozZ781-TQH7T77wzY

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 html-explicit-table-header-binding-detector-03eb08dc -d '<json body>'
```

Example prompt: Can you check the HTML table on this page and tell me which header cell is explicitly bound to each data cell, applying the proper ID lookup and table membership rules? The URL is https://example.com/data-table.html

## When to prefer this

Use this endpoint when you need to programmatically resolve the explicit header-cell relationship in an HTML table from a live URL, particularly when adapting static HTML content for agents, performing accessibility audits, or verifying WCAG-compliant header associations — and when you need the result without exposing table content. Best suited for agents that process or re-render web tables and need precise header binding metadata.

## Known failure modes

- Invalid or unreachable URL returns an error with no binding data
- URL points to a page with no HTML table, resulting in empty or null binding response
- Table uses only implicit header associations (no explicit headers attribute), yielding no explicit binding result
- Malformed HTML prevents correct ID lookup or table structure parsing
- URL exceeds 2048 character limit, returning a validation error

## How this service works

An agent adapting a static HTML table needs the effective explicit header-cell relation after document-first ID lookup, table membership, empty-cell and self exclusions, without disclosing table content.

## Output

Returns the effective explicit header-cell binding for the HTML table found at the provided URL, resolved through document-first ID lookup, table membership filtering, empty-cell exclusion, and self-exclusion — without disclosing the actual content of the table cells.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "format": "uri",
   "maxLength": 2048
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/html-explicit-table-header-binding-detector-03eb08dc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from detect.halowerk.com](https://www.zero.xyz/host/detect.halowerk.com/llms.txt)