# AgentShelf Profile rel=author Link Extractor

> AgentShelf Profile rel=author Link Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Extracts link[rel=author] href values from a public webpage URL or raw HTML, in an SSRF-safe manner.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-rel-author?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-profile-rel-author-link-extractor-86308958
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oXQ_Ar30A9gStMh8mJigQ

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-profile-rel-author-link-extractor-86308958 -d '<json body>'
```

Example prompt: Can you extract all the link rel=author hrefs from this page: https://example.com/some-article? I need to know who authored it based on the HTML link tags.

## When to prefer this

Use this endpoint when you need to programmatically discover author attribution links embedded as link[rel=author] in a page's HTML head, either by supplying a URL for live fetching or providing raw HTML directly. Prefer the free sandbox endpoint (/v1/sandbox/profile-rel-author) for testing; use this paid endpoint for production workloads where SSRF-safe, reliable extraction is needed.

## Known failure modes

- URL is unreachable or returns non-200 status — no hrefs returned or error response
- HTML input exceeds 200,000 character limit — request rejected
- URL blocked due to SSRF safety rules (private IP ranges, localhost) — error returned
- Malformed or missing URL and HTML fields — validation error
- Page has no link[rel=author] elements — empty result returned

## How this service works

Call when an agent needs link rel=author hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-author first.

## Output

A list of href values found in link[rel=author] elements on the page or within the provided HTML. May be empty if no such links are present.

## 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-profile-rel-author-link-extractor-86308958/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)