# Description Metadata — Text Length Statistics

> Description Metadata — 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 2026-10-29).

Parses a webpage or HTML snippet to compute text length statistics for its meta description tags.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-description-lengths?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/description-metadata-text-length-statistics-7c14d4f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d_Li03RATEilEASuFeFYr

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 description-metadata-text-length-statistics-7c14d4f3 -d '<json body>'
```

Example prompt: Can you pull up the text length statistics for the meta description tags on https://example.com — I want to know how long the description content is?

## When to prefer this

Choose this endpoint when you need precise text length statistics specifically for HTML meta description metadata, either from a live URL or a provided HTML snippet, without needing JavaScript rendering. It is best suited for SEO audits, content length compliance checks, and comparing description metadata lengths across pages.

## Known failure modes

- URL is not publicly accessible or returns non-200 status — no content to parse
- HTML content exceeds 100,000 character limit — request rejected
- No meta description tags found on the page — empty or null statistics returned
- URL requires JavaScript rendering — static parser cannot extract dynamically injected content
- Malformed HTML input causes parsing failure

## How this service works

Description metadata — Text length statistics: Text length statistics for Description metadata. 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 (e.g. character counts, min, max, mean, distribution metrics) for description metadata elements found on the parsed page or in the supplied HTML. One result set per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "default": "",
   "maxLength": 2048
  },
  "html": {
   "type": "string",
   "default": "<!doctype html><html><head></head><body><meta name=\"description\" content=\"Example product guide\" id=\"sample\"></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/description-metadata-text-length-statistics-7c14d4f3/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)