Northline WebKit – URL Metadata (Link Preview)

x402

Northline WebKit – URL Metadata (Link Preview) is a paid API for AI agents from northline-webkit.northline-c86.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-04).

Fetches link preview metadata for a given URL, including title, favicon, Open Graph image, and final (post-redirect) URL.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call web and domain utilities for AI agents: URL to Markdown, link preview metadata, links, uptime/redirect check, DNS, email-domain check, WHOIS/RDAP, robots.txt and a one-call domain report. x402 (USDC on Base), no API key, no signup.

Output

Returns a JSON object containing the page title, favicon URL, final resolved URL (after redirects), and Open Graph metadata such as the og:image URL. Example: {title: 'GitHub', favicon: 'https://github.com/favicon.ico', finalUrl: 'https://github.com/', openGraph: {image: 'https://github.githubassets.com/...'}}

Example use cases

Enrich shared links in feed

“I'm building a social feed and users are pasting links — can you fetch the title, OG image, and favicon for https://www.nytimes.com so I can render a proper link card preview?”

Verify OG tags before publishing

“Before I share this blog post, can you pull the Open Graph metadata for https://myblog.com/my-new-post so I can confirm the title and preview image look right?”

Aggregate link previews for newsletter

“I have a link I want to feature in my newsletter — fetch the title, description, and preview image for https://github.com/trending so I can use them in the email layout.”

Technical details

Endpoint

GEThttps://northline-webkit.northline-c86.workers.dev/v1/url/metadata?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need lightweight link preview metadata (title, favicon, OG image, final URL) for a single URL without a heavyweight scrape. Ideal for building link card UIs, enriching feeds, or verifying social preview tags. Prefer this over full-page scrapers when you only need metadata headers, not page content. No API key or signup required — pay per call via USDC on Base.

Side effects

URL is unreachable or returns non-200 → error or empty metadata
URL requires authentication or is behind a paywall → partial or missing metadata
Open Graph tags absent → openGraph fields empty or null
Invalid or malformed URL input → validation error
Redirect loop → may fail to resolve finalUrl
Payment not completed via x402 → 402 Payment Required response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "title": "GitHub",
    "favicon": "https://github.com/favicon.ico",
    "finalUrl": "https://github.com/",
    "openGraph": {
      "image": "https://github.githubassets.com/..."
    }
  }
}

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