golive-mcp
Check a site before you share the link.
You deploy, paste the link into LinkedIn, and get a grey box with no image. Or someone refreshes /pricing and gets a Vercel 404. golive catches both before anyone sees them, plus the staging noindex you forgot and the Vite logo still sitting in the tab.
It runs as an MCP server, so Claude, Cursor or any MCP client can check a URL after deploying and fix what it finds. It also runs as a plain CLI. No API key, no account.
What it found on a fresh Vite app
This is a React app straight out of npm create vite, built, and served by a host with no SPA fallback. Real output, trimmed:
$ npx golive-mcp check http://localhost:4791 /about
Not ready: 2 blocking, 10 to look at, 4 fine.
## Link previews
✗ og:image: No preview image. On LinkedIn, X and iMessage the link becomes a plain grey text card.
Fix: Add a 1200x630 image: <meta property="og:image" content="https://yoursite.com/og.png">
! og:title: Missing. Platforms fall back to the <title> ("demo"), which is often not what you want shared.
! twitter:card: Missing. X reads your og: tags but only shows a small thumbnail without this.
## How the link will look
LinkedIn: [no image] / demo / localhost:4791
X: small square thumbnail (no twitter:card tag) / demo / localhost:4791
Slack: localhost:4791 / demo / (none) / [no image]
## Routes
✗ link /about: Opening /about directly returns 404. It works when clicked inside the app,
but breaks on refresh, bookmark or share.
Fix: Configure the host to serve index.html for unknown paths, so the client router can take over.
On Vercel the fix line names the exact vercel.json rewrite. On Netlify it names the _redirects line.
Install
Claude Code
claude mcp add golive -- npx -y golive-mcp
Claude Desktop, Cursor, Windsurf (add to the MCP config file)
{
"mcpServers": {
"golive": { "command": "npx", "args": ["-y", "golive-mcp"] }
}
}
No MCP client
npx golive-mcp check yoursite.com
npx golive-mcp check localhost:5173 /about /pricing
The CLI exits with code 1 when anything is blocking, so it drops into CI as a pre-launch gate.
Then ask your assistant something like "I just deployed, check https://mysite.com before I post it" and it will run the checks and fix the findings in your code.
| Tool | What it checks |
|---|
golive | Everything below in one pass, with a verdict |
check_link_preview | og and Twitter card tags, and whether the image loads, is a raster format, is about 1200x630 and is under 5 MB. Shows how the card will look on LinkedIn, X, Slack, iMessage and Discord, and returns the image itself so the model can look at it |
check_routes | Opens internal links directly, the way a refresh or a shared link does. Catches the SPA 404 and soft 404s |
check_basics | Template titles, the Vite favicon, noindex or Disallow: / left from staging, viewport, lang, apple-touch-icon, mixed content |
check_security_headers | HTTPS and the http redirect, HSTS, nosniff, clickjacking protection, CSP, Referrer-Policy, X-Powered-By |
Every tool takes a url. golive and check_routes also take paths, a list of routes to open directly. Client-rendered apps have no links in their HTML, so pass your real routes to test them.
Limits
- The platform mockups are text, not screenshots. Titles get cut by pixel width, so the cut-off points are a guide.
- golive reads the HTML your server sends. It does not run JavaScript, which is also what LinkedIn, Slack and the other scrapers do, so a tag that only appears after React renders is a tag they never see.
- It can check
localhost, which is the point: run it before you deploy. It only speaks http and https, caps every response at 5 MB and times out after 10 seconds.
- Text quoted from the page (titles, header values) is truncated before it reaches the model, which limits how much a hostile page can inject into your assistant's context.
Development
npm install
npm test
npm run build
node dist/index.js check example.com
License
MIT