# AgentShelf Source Srcset Extractor

> AgentShelf Source Srcset Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-02).

Extracts all srcset attribute values from <source> elements in a public webpage or raw HTML, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-source-srcset?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-source-srcset-extractor-3a5fccf8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kHNiNGwyjKGe_TmLt0r7x

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-source-srcset-extractor-3a5fccf8 -d '<json body>'
```

Example prompt: Can you extract all the srcset values from the <source> elements on this page: https://example.com/gallery — I want to see what responsive image descriptors they're using?

## When to prefer this

Use this endpoint when you need to specifically extract srcset attribute values from <source> elements in HTML or a public URL — particularly for auditing responsive images, analyzing media breakpoints, or processing picture/video source sets. Prefer this over generic CSS selector endpoints when you only need srcset values and want a purpose-built, SSRF-safe extractor. Try the free sandbox POST /v1/sandbox/profile-source-srcset first before paying $0.007 USDC per call.

## Known failure modes

- URL is unreachable or returns a non-200 status — extraction fails with an error
- HTML input exceeds 200,000 character limit — request rejected
- URL is blocked by SSRF safety rules (internal/private addresses) — access denied
- Page contains no <source> elements with srcset attributes — empty result returned
- Malformed HTML input prevents parsing — partial or empty results returned
- URL resolves to a redirect loop or timeout — error returned

## How this service works

Call when an agent needs source srcset values extracted from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/profile-source-srcset first.

## Output

Returns a list of srcset attribute values extracted from all <source> elements found in the given URL or HTML, capturing responsive image descriptors such as URLs paired with width descriptors (e.g. '1x', '2x', '800w') as defined in the page's markup.

## 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 name=\"description\" content=\"Desc\"><meta property=\"og:title\" content=\"OG\">\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-source-srcset-extractor-3a5fccf8/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)