# Dfetcher Vitamin D MCP server

Source: https://glimind.com/server/mcp-registry%2Fcom.dfetcher%2Fvitamin-d
Registry id: `mcp-registry/com.dfetcher/vitamin-d`
Status: live (checked 2026-10-27T09:03:11.861Z)

## Measurements (30 days)

- Uptime: 99.98%
- Checks: 5015
- Outages (90 days): 1

## Install

```json
{
  "mcpServers": {
    "dfetcher-vitamin-d-mcp-server": {
      "type": "http",
      "url": "https://dfetcher.com/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http dfetcher-vitamin-d-mcp-server https://dfetcher.com/mcp
```

## Tools (3)

- `calculate`: Calculate vitamin D synthesis at a given location and time. Returns sun position, UV index, IU/min, minutes to reach the target dose, MED (sunburn threshold), t
- `describe_skin_types`: Returns the six Fitzpatrick skin types with sun-reactivity behavior and descriptive ancestry hints. Call this when the user's skin type is unknown so you can pi
- `geocode`: Turn a place name, postal code, or "code, CC" string into { lat, lon, label }. Auto-detects US/CA/GB/NL/JP/BR postal patterns; ambiguous digit-only codes defaul

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.