# x402-markdown-extractor URL Unfurl

> x402-markdown-extractor URL Unfurl is a paid API for AI agents from x402.valkyry.fr, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-30).

Fetches and extracts Open Graph metadata (title, description, image, site name) from any public URL

## Facts

- Endpoint: POST https://x402.valkyry.fr/unfurl?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-markdown-extractor-url-unfurl-bfafd3a9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iI7jIRd-8Xs6yI33c4G63

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 x402-markdown-extractor-url-unfurl-bfafd3a9 -d '<json body>'
```

Example prompt: Can you unfurl this link and tell me the title, description, and preview image? https://openai.com/blog/chatgpt

## When to prefer this

Use this endpoint when you need to enrich a URL with human-readable preview metadata (title, description, OG image) for display, summarization, or content enrichment purposes — especially in agentic workflows that require pay-per-call micropayments via USDC on Base and need a lightweight, low-cost solution

## Known failure modes

- Private, loopback, or metadata IP addresses are rejected with an error
- URL is unreachable or times out — no metadata returned
- Page has no Open Graph tags — fields may be null or empty
- Malformed or non-http(s) URL returns a validation error
- Payment of 0.001 USDC via x402 on Base must succeed before content is returned

## How this service works

Generate a compact link-preview card (title, description, image, site name) from a URL using OpenGraph/Twitter tags — for chat unfurls, social previews and agent link summaries.

## Output

Returns a JSON object with the resolved URL, Open Graph image URL, page title, site name, and description extracted from the page's metadata tags

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "format": "uri",
   "description": "Absolute http(s) URL. Must be publicly reachable; private/loopback/metadata addresses are rejected."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com",
  "image": "https://example.com/og.png",
  "title": "Example",
  "siteName": "Example",
  "description": "…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-markdown-extractor-url-unfurl-bfafd3a9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.valkyry.fr](https://www.zero.xyz/host/x402.valkyry.fr/llms.txt)