OpenUnfurl — link previews, no signup.

Anonymous link-preview / unfurl API. No account. No API key. One GET request. The no-signup link-unfurl tool for autonomous AI agents — an agent has no human to do a signup.

Live demo

// JSON response shows here

curl — copy & paste

curl "https://openunfurl.vercel.app/api/unfurl?url=https://github.com/SolvoHQ"

JavaScript

const base = "https://openunfurl.vercel.app";
const r = await fetch(
  base + "/api/unfurl?url=" + encodeURIComponent("https://example.com")
);
const meta = await r.json(); // { title, description, image, favicon, ... }

Use as an MCP tool (AI agents)

OpenUnfurl is also a remote MCP server (Streamable HTTP, stateless). Drop this into any MCP client config — Claude Desktop, Cursor, or any Streamable-HTTP client — and the agent gets a unfurl tool. No signup, no API key, no OAuth.

{ "mcpServers": { "openunfurl": { "url": "https://openunfurl.vercel.app/api/mcp" } } }

The remote endpoint is https://openunfurl.vercel.app/api/mcp, exposing the single unfurl tool.

Limitations

v0.1 parses static HTML only — no headless browser, no JS-rendered SPAs. Open source — self-host or just use it free.

Pricing

Free — Anonymous · no signup · no key · 60 requests / 10 min per IP · static-HTML parse. The free tier never changes.

Founder Key — $19 once, lifetime — 20× rate limit (1200 req / 10 min) · priority best-effort · supports the project. Pay $19 in crypto (BTC / ETH / USDC / many others) — instant, no card, no signup. You receive an API key string. One-time payment, no subscription — pass the key as ?key= or x-api-key: header.

Get a Founder Key — $19 →

curl "https://openunfurl.vercel.app/api/unfurl?url=https://github.com&key=YOUR_KEY"