# AgentShelf Hreflang Extractor

> AgentShelf Hreflang Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-29).

Extracts anchor hreflang attribute values from a public webpage URL or raw HTML in an SSRF-safe manner

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-a-hreflang?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-hreflang-extractor-33cf4a69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4mIpgV-_7UcDIVUOszN_a

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-hreflang-extractor-33cf4a69 -d '<json body>'
```

Example prompt: Can you extract all the hreflang values from https://example.com/about — I need to see which language and region alternates are declared on that page?

## When to prefer this

Choose this endpoint when you need to programmatically extract hreflang alternate language annotations from a live webpage or known HTML for SEO auditing, internationalization verification, or competitor research. It is SSRF-safe, making it appropriate for agent pipelines that fetch arbitrary user-supplied URLs. Prefer the free sandbox endpoint (/v1/sandbox/profile-a-hreflang) for testing before committing to the $0.002 USDC paid 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 for SSRF safety reasons (private/internal IP ranges) — returns an SSRF error
- Page contains no anchor hreflang attributes — returns an empty result set
- Malformed HTML prevents proper parsing — partial or empty results
- URL string is shorter than 8 characters or longer than 2048 characters — validation error

## How this service works

Call when an agent needs anchor hreflang values extracted from a public page or HTML (SSRF-safe). Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/profile-a-hreflang first.

## Output

A list of hreflang attribute values extracted from anchor elements on the specified page or HTML, representing language and region codes (e.g. 'en-US', 'fr-FR', 'x-default') along with their associated URLs, enabling analysis of a page's international SEO link annotations.

## 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-hreflang-extractor-33cf4a69/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)