TLD Lookup Skill

Overview

The data comes from the open top-level-domain-names dataset on GitHub, which lists each TLD with its type and sponsoring organization. A scheduled job downloads it weekly, refuses the update if it parses fewer than 1,000 entries, and stores the result; the API loads that copy and keeps it in memory.

`tld` is lowercased, trimmed and stripped of one leading dot, so `.COM`, `com` and `Com` all match, and the response echoes the normalized value. Send only the TLD: a full domain such as `example.com` is looked up as that literal string and returns `found: false`. Internationalized TLDs can be sent in Unicode or in their punycode `xn--` form and resolve to the same record; direction marks around right-to-left names are ignored.

`type` is the dataset's classification, for example `generic`, `country-code` or `sponsored`. `organization` is the sponsoring organization recorded for the TLD. Where the source lists the sponsor as "Not assigned", `organization` is null while `found` stays true, so check both fields before treating an extension as active.

An unknown TLD still returns 200, with `found: false` and null `type` and `organization`, which keeps validation code simple. Matching is by exact key only: there is no fuzzy matching or suggestion, and a second-level suffix such as `co.uk` is not a TLD and will not match.

Live Test TLD Lookup Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as TLDLookupSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

{
  "name": "TLDLookupSkill",
  "arguments": {
    "tld": "com"
  }
}

You do not name the tool yourself; the model picks it. Asking about com in the terms this skill covers is enough for it to reach for TLDLookupSkill on its own — naming it explicitly also works, and is the way to force the call.

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

https://api.vervekit.com/v1/mcp

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

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{
  "status": "ok",
  "error": null,
  "data": {
    "tld": "com",
    "found": true,
    "type": "generic",
    "organization": "VeriSign Global Registry Services"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Domain Validation

Verify that a TLD is valid and registered with IANA before processing user-submitted domains

Phishing Detection

Identify domains using unusual or newly-created TLDs that may indicate phishing attempts

Domain Analysis

Understand the type and ownership of domain extensions for research and compliance purposes

Registrar Tools

Look up TLD information to determine registration requirements and managing organizations

Other ways to use TLD Lookup Skill

Set up TLD Lookup Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

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