# Textarea Attribute Presence Check

> Textarea Attribute Presence Check is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Checks whether a specific HTML attribute (optionally with a given value) is present on textarea elements matching a search term in a web page or supplied HTML.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-textareas-attribute-presence?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/textarea-attribute-presence-check-fc2b23de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JqI20ad2tC_KZhYiGQAAL

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 textarea-attribute-presence-check-fc2b23de -d '<json body>'
```

Example prompt: Check whether the textarea on https://example.com/contact has an attribute called 'aria-label' — the textarea is associated with the term 'message' and I want to know if that attribute is present.

## When to prefer this

Choose this endpoint when you need a lightweight, low-cost static check to confirm whether a specific HTML attribute exists (or has a specific value) on a textarea element in a public page or known HTML snippet, without needing full JavaScript rendering or dynamic content. Ideal for accessibility audits, form QA pipelines, and CI checks where you only need a boolean presence result rather than full DOM traversal.

## Known failure modes

- URL is unreachable or returns a non-200 HTTP status
- HTML exceeds 100,000 character limit
- Attribute name fails the pattern validation (must start with a letter, max 50 chars)
- No textarea elements found matching the search term
- Term is empty or missing (minLength 1 required)
- Malformed HTML provided that cannot be statically parsed
- Both url and html are empty or omitted

## How this service works

Textarea defaults — Attribute presence check: Attribute presence check for Textarea defaults. 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 attribute presence check result.

## Output

Returns a bounded attribute presence check result indicating whether the specified attribute (and optionally a specific attribute value) is present on textarea elements matching the given search term, parsed statically from the provided URL or HTML 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><textarea id=\"sample\" data-kind=\"example\">Example product guide</textarea></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/textarea-attribute-presence-check-fc2b23de/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)