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FastX402 Link Preview
x402
FastX402 Link Preview is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).
Fetches Open Graph, Twitter Card, and metadata for any public URL and returns a structured link preview object
Price / call$0.001
Success—
StatusUnknown
How this service works
200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.
Output
A JSON object containing structured link preview data: the page title, description, og:image URL and alt text, favicon URL, site name, canonical URL, final resolved URL, Open Graph properties (url, type, title, site_name), Twitter Card type and site handle, language code, theme color, HTTP status, content type, and whether the URL redirected.
Example use cases
Enrich shared links in chat app
“Before I post this article link to my team, can you pull the preview metadata from https://techcrunch.com/2024/01/15/openai-news/ so I can see the title, image, and description?”
Validate OG tags on a new page
“I just published my landing page at https://myproduct.com — can you check what the Open Graph title, description, and image look like so I know it'll preview correctly when shared on social media?”
Aggregate metadata for a reading list
“I have this article URL https://www.wired.com/story/best-gadgets-2024/ — can you grab its link preview metadata including title, description, and thumbnail image so I can add it to my reading list app?”
Technical details
Endpoint
GEThttps://fastx402.tools/link-preview?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured Open Graph and Twitter Card metadata for a given URL without setting up your own scraping infrastructure or managing API keys. It is ideal for link enrichment pipelines, social sharing previews, reading list apps, or any workflow where you need a page's title, image, description, and canonical metadata on demand. Prefer it over raw HTTP fetching when you want normalized, pre-parsed metadata rather than raw HTML.
Side effects
- URL is not publicly accessible or behind authentication — returns non-200 status
- Invalid or malformed URL provided — request fails validation
- URL times out or is unreachable — upstream fetch error
- Page has no Open Graph or meta tags — fields return null or empty
- Private/localhost URLs rejected — only public http/https accepted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://github.com/",
"lang": "en",
"type": "object",
"image": "https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png",
"title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub",
"author": null,
"status": 200,
"favicon": "https://github.githubassets.com/favicons/favicon.png",
"finalUrl": "https://github.com/",
"imageAlt": "Join the world's most widely adopted, AI-powered developer platform ...",
"siteName": "GitHub",
"canonical": "https://github.com/",
"openGraph": {
"url": "https://github.com/",
"type": "object",
"title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub",
"site_name": "GitHub"
},
"redirected": false,
"themeColor": "#1e2327",
"contentType": "text/html",
"description": "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.",
"twitterCard": "summary_large_image",
"twitterSite": "@github"
}
}Tags
x402
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