Birthstone Lookup Skill

Overview

Birthstones answers from a fixed twelve-row table, one row per month, so responses are instant and identical on every call. Each lookup returns a `birthstones` array and a `count`.

The parameters are checked in a fixed order: `list=all` first, then `month`, then `zodiac`, then `stone`. A call with none of them also returns the full table. `month` accepts a number from 1 to 12 or an English month name in any case; anything else returns a 404. `zodiac` is matched case-insensitively against each month's `zodiacSigns`, and because every sign straddles two months, a sign returns two rows. The response echoes the sign, capitalised, as `zodiacSign`. `stone` is an exact, case-insensitive name match against both `primaryStone` and `alternateStones`, so `citrine` finds November even though it is not November's primary stone. `isPrimaryStone` tells you which case you hit, and `stone` echoes your input.

`hardness` is the Mohs scale value (pearl is 2.5, diamond 10). `mineralFamily` is a classification such as Beryl, Corundum or Organic. `anniversaryYear` is the wedding anniversary traditionally tied to the stone, for example 55 for emerald.

On the Free plan, `alternateStones`, `meaning`, `hardness`, `mineralFamily` and `anniversaryYear` are removed from each row. A stone search still matches alternate stones on the Free plan; only the field listing them is hidden.

Live Test Birthstone Lookup Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as BirthstoneLookupSkill. 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": "BirthstoneLookupSkill",
  "arguments": {
    "month": "5"
  }
}

You do not name the tool yourself; the model picks it. Asking about 5 in the terms this skill covers is enough for it to reach for BirthstoneLookupSkill 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": {
    "count": 1,
    "birthstones": [
      {
        "month": 5,
        "monthName": "May",
        "primaryStone": "Emerald",
        "alternateStones": [
          "Chrysoprase",
          "Agate"
        ],
        "color": "Green",
        "meaning": "Rebirth, love, fertility",
        "zodiacSigns": [
          "Taurus",
          "Gemini"
        ],
        "hardness": 7.5,
        "mineralFamily": "Beryl",
        "anniversaryYear": 55
      }
    ]
  }
}

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 1 credit each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Jewelry E-commerce

Display relevant birthstone options for gift recommendations

Astrology Applications

Show birthstones associated with zodiac signs

Gift Finder Tools

Suggest personalized gemstone gifts based on birth month

Educational Content

Provide gemstone information for learning applications

Other ways to use Birthstone Lookup Skill

Set up Birthstone 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.

Related

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