# AgentShelf CSS Definition Description (dd) Extractor

> AgentShelf CSS Definition Description (dd) Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-29).

Extracts definition description (dd) elements from a public web page or raw HTML using CSS selectors, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/css-dd?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-css-definition-description-dd-extractor-c243ef96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3HkxhaJUDe-Szgz3695sG

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 agentshelf-css-definition-description-dd-extractor-c243ef96 -d '<json body>'
```

Example prompt: Can you extract the definition description (dd) text from this page: https://example.com/glossary — I need the content of all the dd elements on that page.

## When to prefer this

Use this endpoint when you need to extract definition description (dd) element content from a public web page or raw HTML string. It is SSRF-safe, making it appropriate for processing URLs supplied by users or external sources. Prefer the free POST /v1/sandbox/css-dd endpoint for testing; use this paid endpoint for production usage. Choose this over general-purpose HTML parsers when you specifically need dd element content from definition lists.

## Known failure modes

- URL is unreachable or returns non-200 status — extraction fails with an error
- HTML input exceeds 200,000 character limit — rejected with validation error
- URL points to an internal/private network resource — blocked by SSRF protection
- No dd elements found in the page or HTML — returns empty result
- Malformed HTML that cannot be parsed — may return empty or partial result
- URL shorter than 8 characters or longer than 2048 characters — rejected by schema validation

## How this service works

Call when an agent needs definition description text via dd from a public page or HTML (SSRF-safe). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/css-dd first.

## Output

Returns the text content of definition description (dd) elements extracted from the provided URL or HTML, with SSRF protection ensuring only safe public pages are accessed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 8,
   "description": "Public page to fetch. The selector or profile is fixed by the SKU. Provide url or html."
  },
  "html": {
   "type": "string",
   "examples": [
    "<!doctype html><html lang=\"en\"><head><title>Hello</title>\n<meta charset=\"utf-8\"><meta name=\"description\" content=\"Desc\">\n<link rel=\"canonical\" href=\"https://example.com/\"><link rel=\"icon\" href=\"/favicon.ico\">\n</head><body><h1>Hello</h1><a href=\"https://example.com/a\">A</a></body></html>"
   ],
   "maxLength": 200000,
   "minLength": 1,
   "description": "HTML to extract from locally. Provide html or url. When both are set, html is used."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-css-definition-description-dd-extractor-c243ef96/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)