# Web Page H3 Text Length Statistics

> Web Page H3 Text Length Statistics 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).

Extracts and returns text length statistics for all H3 (level-three heading) elements on a given public web page or supplied HTML snippet.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-h3-lengths?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/web-page-h3-text-length-statistics-5ca5d21e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KiZZY9tqLKlyKy3G2MaEz

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 web-page-h3-text-length-statistics-5ca5d21e -d '<json body>'
```

Example prompt: Can you pull the text length statistics for all H3 headings on https://example.com/docs — I want to know things like the min, max, and average character counts of those headings?

## When to prefer this

Choose this endpoint when you need lightweight, fast, static analysis of H3 heading text lengths on a public web page or known HTML snippet, without needing JavaScript execution or authenticated access. Ideal for SEO audits, content consistency checks, and competitive benchmarking where only heading length statistics (not full content extraction) are needed.

## Known failure modes

- URL is not publicly accessible or returns a non-200 HTTP status
- Page requires JavaScript rendering to display H3 elements
- HTML input exceeds 100,000 character limit
- No H3 headings found on the page or in the HTML
- URL malformed or exceeds 2048 character limit
- Rate limiting or payment failure via x402 protocol

## How this service works

Level-three headings — Text length statistics: Text length statistics for Level-three 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 text length statistics result.

## Output

Returns bounded text length statistics for all H3 heading elements found on the parsed page or HTML, including metrics such as minimum, maximum, and average character counts of the heading texts. Results are derived from static HTML parsing without JavaScript rendering.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "default": "",
   "maxLength": 2048
  },
  "html": {
   "type": "string",
   "default": "<!doctype html><html><head></head><body><h3 id=\"sample\" data-kind=\"example\">Example product guide</h3></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/web-page-h3-text-length-statistics-5ca5d21e/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)