# AgentShelf Profile Rel-Help Link Extractor

> AgentShelf Profile Rel-Help Link Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-18).

Extracts all link[rel=help] href values from a public webpage URL or raw HTML, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-rel-help?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-profile-rel-help-link-extractor-d485a589
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xSPeuvMmPvU-IhOc146wL

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-help-link-extractor-d485a589 -d '<json body>'
```

Example prompt: Can you extract all the link[rel=help] hrefs from https://example.com/docs — I need to find every help link referenced on that page?

## When to prefer this

Use this endpoint when you need to programmatically discover link[rel=help] hrefs from a public webpage or a chunk of HTML you already have. It is SSRF-safe, making it suitable for agent workflows that process user-supplied URLs without risking internal network access. If a free sandbox equivalent at /v1/sandbox/profile-rel-help is available, prefer that first to avoid the $0.002 USDC cost.

## Known failure modes

- URL is unreachable or returns non-200 status — extraction fails
- SSRF-blocked URL (internal/private IP ranges) — request rejected for security
- HTML input exceeds 200,000 character limit — request rejected
- URL shorter than 8 characters or longer than 2048 characters — validation error
- Target page contains no link[rel=help] elements — returns empty result
- Malformed HTML that cannot be parsed — may return incomplete or empty results

## How this service works

Call when an agent needs link rel=help hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-help first.

## Output

A list of href values found in link[rel=help] elements on the target page or within the provided HTML. Returns the extracted URLs as structured data. If no rel=help links are found, returns an empty list.

## 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-help-link-extractor-d485a589/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)