Shoe Size Converter Skill

Overview

Shoe Size Converter works by converting the input size to centimeters as a base measurement, then calculating equivalent sizes in all supported regions. Returns conversions for all international standards simultaneously.

Live Test Shoe Size Converter Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as ShoeSizeConverterSkill. 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.

Tool call

{
  "name": "ShoeSizeConverterSkill",
  "arguments": {
    "size": "9",
    "from": "us"
  }
}

You do not name the tool yourself; the model picks it. Asking about 9 in the terms this skill covers is enough for it to reach for ShoeSizeConverterSkill 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"
    }
  }
}

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.

Argument	Type	Description
`size`Required	string	The shoe size to convert
`from`Required	string	Source region `usukeucmjpaumxkr`
`gender`Optional	string	Gender sizing `menwomenunisexchild` default unisex

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.

Result

{
  "status": "ok",
  "error": null,
  "data": {
    "input_size": 9,
    "input_region": "US",
    "gender": "men",
    "conversions": {
      "cm": 29.1,
      "jp": 29.1,
      "us": 9,
      "uk": 8.1,
      "au": 8.1,
      "eu": 43.7,
      "mx": 13.7,
      "kr": 43.7
    },
    "note": "Sizes are approximate and may vary by manufacturer"
  }
}

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.

Field	Type	Example	Description
`input_size`	number	`9`	The size that was supplied
`input_region`	string	`US`	Sizing system the input was given in
`gender`	string	`men`	Gender sizing used for conversion
`conversions`	object	`{…}`	The equivalent size in every supported sizing system
`conversions.cm`Premium	number	`29.1`	Size in centimeters
`conversions.jp`Premium	number	`29.1`	Japanese shoe size
`conversions.us`	number	`9`	US shoe size
`conversions.uk`	number	`8.1`	UK shoe size
`conversions.au`	number	`8.1`	Equivalent Australian size
`conversions.eu`Premium	number	`43.7`	EU shoe size
`conversions.mx`	number	`13.7`	Equivalent Mexican size
`conversions.kr`	number	`43.7`	Equivalent Korean size, in millimetres
`note`	string	`Sizes are approximate and may vary by manufacturer`	Caveat that sizes are approximate and vary by manufacturer

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.

Status	What it means
`400` / `422`	The arguments did not validate. The message names the offending one.
`401`	The OAuth session is invalid or expired — reconnect the server.
`403`	Blocked by a key restriction or an IP allow-list. Never a bad identity.
`404`	This skill is not part of VerveKit. Check the catalog.
`429`	Out of credits, or a brief rate limit. The message tells them apart.

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

E-commerce: Help international customers find their correct shoe size when shopping from different countries
Travel Planning: Convert shoe sizes when shopping abroad or purchasing from international retailers
Size Charts: Generate comprehensive size charts for footwear products with multiple regional standards
Retail Apps: Integrate size conversion features into shopping apps to improve customer experience

Other ways to use Shoe Size Converter Skill

Set up Shoe Size Converter 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.

Call it as a REST APIOne HTTPS endpoint and an x-api-key header, with SDKs for Node, Python and .NET.APIVerve →Reference →

Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContext →Reference →