Use psl with your AI.
Connect your account once and let the AI you already use work with it, without building another integration. Extract the true root domain, TLD, and subdomain from any URL using the official Mozilla Public Suffix List.
Developed, maintained, and hosted by Vinkius.
MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED
Waiting for input…
Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.
Complete set · 1 capability
The complete psl capability set.
These are the exact actions your AI can choose when you ask it to work with psl.
01
1 capability in this set.
Part of 1 available through psl.
- 01
Extract domain
The AI cannot reliably determine that the TLD of "app.vinkius.co.uk" is ".co.uk" (not ".uk"). This engine uses the official Mozilla Public Suffix List to fragment hostnames with 100% accuracy. Extracts the true root domain, TLD, subdomain, and SLD from any hostname using the official Mozilla Public Suffix List. Handles complex TLDs like .co.uk, .com.br correctly
Observed, not estimated
1400ms average. Fast in production.
psl is checked daily against the live service.
- Fastest day
- 1194ms
- Slowest day
- 1615ms
- 14-day trend
- Slowing+7%
Connect your client
One URL. Every client.
Activate the Connector, copy your link, and paste it into the client you already use. 1 capability arrives ready to run.
Preview access · not provider authentication
The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of psl, so you can see the experience inside your AI.
It does not authenticate your account with psl. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.
psl Connector
You're all set. Choose your MCP client and follow the setup instructions.
https://edge.vinkius.com/vk_preview_LmUqJapaOSRBG8u0znMC3iVKUNjgZCM8mbyDzszm/mcpClaude Desktop
Follow the steps below to connect in seconds.
- 1In Claude Desktop, open Settings → Connectors.
- 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
- 3Click Add and start a new chat — psl capabilities are ready to use.
{
"mcpServers": {
"public-suffix-extractor-mcp": {
"url": "https://edge.vinkius.com/vk_preview_LmUqJapaOSRBG8u0znMC3iVKUNjgZCM8mbyDzszm/mcp"
}
}
}
Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline
Step-by-step instructions for each client are in the guide. How to connect
FAQ
Questions psl owners ask.
- 01
Why can't I just split the domain by dots?
Because TLDs like .co.uk, .com.br, and .org.au have multiple parts. Splitting by dots would incorrectly identify the root domain. The PSL has 9,000+ entries.
- 02
Does it handle cloud provider domains?
Yes. Domains like .amazonaws.com, .azurewebsites.net, and *.cloudfront.net are in the PSL and handled correctly.
- 03
Can I pass a full URL with protocol and path?
Yes. The engine automatically strips the protocol (http/https), path, and query parameters before parsing.
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