# AgentShelf Profile Rel-Prev Link Extractor

> AgentShelf Profile Rel-Prev Link 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 link rel=prev 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-prev?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-profile-rel-prev-link-extractor-fea02169
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FpFAvc4yB5F2LYAPlRTop

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-prev-link-extractor-fea02169 -d '<json body>'
```

Example prompt: Can you extract the rel=prev link from this page — https://example.com/blog?page=3 — so I know which page comes before it in the pagination?

## When to prefer this

Choose this endpoint when you need to reliably extract rel=prev pagination links from either a live public URL or raw HTML content, especially in SSRF-safe contexts. Prefer the unpaid sandbox at POST /v1/sandbox/profile-rel-prev for testing before committing the $0.004 USDC per-call cost. Use this over general-purpose scraping tools when you specifically need link relation extraction without storing data.

## Known failure modes

- URL is unreachable or returns a non-200 status — fetch fails with an error
- No rel=prev link found in the page or HTML — returns empty or null result
- HTML input exceeds 200,000 character limit — request rejected
- URL blocked due to SSRF safety restrictions (private IPs, localhost) — returns SSRF guard error
- Malformed URL input below minimum length — validation error

## How this service works

Call when an agent needs link rel=prev hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-prev first.

## Output

Returns the extracted href value(s) from any link elements with rel=prev found in the provided URL's page or the supplied raw HTML. If no rel=prev link is present, the response will indicate absence. The result enables agents to navigate paginated content backwards or verify SEO pagination signals.

## 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-prev-link-extractor-fea02169/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)