# AgentShelf og:url Extractor

> AgentShelf og:url Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-02).

Extracts the og:url Open Graph meta tag from a public webpage URL or raw HTML, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-og-url?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-og-url-extractor-9b4c968c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mMdWrqlQbbi59b73ZjK2F

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-og-url-extractor-9b4c968c -d '<json body>'
```

Example prompt: Can you extract the og:url meta tag from https://example.com/some-article so I know the canonical URL that page is advertising?

## When to prefer this

Choose this endpoint when you need only the og:url Open Graph property from a page and want a lightweight, cost-effective extraction ($0.006 USDC) without running a full scraper or LLM. It is SSRF-safe, so it is appropriate for agent pipelines that fetch arbitrary user-supplied URLs. Prefer the free sandbox endpoint (/v1/sandbox/profile-og-url) for testing. Use this paid endpoint for production workloads where reliability matters.

## Known failure modes

- URL is unreachable or returns non-200 status — fetch fails with an error
- SSRF-blocked URL (private IP range, localhost) — rejected for security reasons
- No og:url meta tag present in the page HTML — returns empty or null result
- HTML input exceeds 200,000 character limit — request rejected
- Malformed or non-HTML content at URL — parser may return no result
- Neither url nor html provided — validation error

## How this service works

Call when an agent needs og:url extracted from a public page or HTML (SSRF-safe). Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/profile-og-url first.

## Output

Returns the value of the og:url Open Graph property found in the page's HTML meta tags — typically a canonical absolute URL string. If no og:url tag is present, returns null or an empty result.

## 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-og-url-extractor-9b4c968c/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)