# Level-Six Headings Structured Extraction

> Level-Six Headings Structured Extraction is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Extracts structured data from H6 heading elements in a webpage or supplied HTML, filtered by a search term and optional attribute value.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-h6-items?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/level-six-headings-structured-extraction-f62cb897
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m0vGRcoF6zmmuMwwHF5C9

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 level-six-headings-structured-extraction-f62cb897 -d '<json body>'
```

Example prompt: Can you extract all the H6 headings from https://example.com/product-guide that contain the word 'product' and have an id attribute equal to 'sample'?

## When to prefer this

Use this endpoint when you need to extract specifically H6 (level-six) heading elements from a static, publicly accessible webpage or provided HTML snippet, filtered by keyword and/or attribute. Prefer this over general-purpose scrapers when you only need H6 elements and want a structured, pre-parsed result at low cost. Not suitable for pages requiring JavaScript rendering, authentication, or when you need headings of other levels (H1–H5).

## Known failure modes

- URL is inaccessible, behind a login wall, or requires JavaScript rendering — endpoint only does static parsing
- HTML exceeds 100,000 character limit causing rejection
- Term parameter missing or below minimum length of 1 character
- Attribute name does not match the required pattern (must start with a letter, alphanumeric/colon/underscore/hyphen)
- No matching H6 elements found returns an empty result set
- URL returns a non-HTML content type
- Payment of 0.01 USDC not fulfilled via x402 protocol results in 402 response

## How this service works

Level-six headings — Structured extraction: Structured extraction for Level-six headings. 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 structured extraction result.

## Output

Returns a bounded structured extraction result containing the matched H6 heading elements from the provided URL or HTML, filtered by the specified search term and optional attribute/attribute-value constraints. Typically includes heading text and relevant attribute data for each matched 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><h6 id=\"sample\" data-kind=\"example\">Example product guide</h6></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/level-six-headings-structured-extraction-f62cb897/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)