# Aside Blocks Structured Extraction

> Aside Blocks 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 2026-10-21).

Extracts structured data from HTML aside elements on a public web page or supplied HTML, filtered by a search term and attribute value.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-asides-items?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aside-blocks-structured-extraction-59f8cfba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fcLO9JZhGDlrsKOFpyMVd

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 aside-blocks-structured-extraction-59f8cfba -d '<json body>'
```

Example prompt: Pull out all aside blocks from https://example.com/docs/guide that have the attribute 'data-kind' equal to 'warning' and contain the term 'security', and skip anything matching these previously seen texts: ['Old disclaimer text'].

## When to prefer this

Choose this endpoint when you need to extract structured content specifically from HTML aside elements (sidebars, callouts, supplementary content blocks) on a static public page or from supplied HTML, filtered by an attribute and search term. It is ideal when you know the structural HTML role of the content you want (aside tags) and need lightweight static parsing without JavaScript execution. It includes deduplication support via previous_texts for incremental crawling workflows.

## Known failure modes

- URL is not publicly accessible or returns a non-200 status
- Page requires JavaScript rendering which is not supported
- No aside elements found matching the given attribute and term
- HTML input exceeds 100,000 character limit
- Attribute name does not match the pattern ^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$
- term field is empty or missing
- URL and html both absent or malformed

## How this service works

Aside blocks — Structured extraction: Structured extraction for Aside blocks. 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 aside block(s) from the provided URL or HTML, filtered by the specified attribute name, attribute value, and search term. The result includes the text or structured content of matching aside elements, deduplicated against any previously seen texts supplied.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "default": "",
   "maxLength": 2048
  },
  "html": {
   "type": "string",
   "default": "<!doctype html><html><head></head><body><aside id=\"sample\" data-kind=\"example\">Example product guide</aside></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/aside-blocks-structured-extraction-59f8cfba/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)