mcpbeat

D Fetcher MCP Server

com.dfetcher/vitamin-d
answering

D Fetcher is answering right now. Last checked 3 min ago. It exposes 3 tools.

Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 39 hours of history
39 hours agonow
100.0%
Uptime 24h
91 of 91 checks
3
Tools
read from the server
127 ms
Response time
average over 24h
open, no key
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

run in your terminal
claude mcp add vitamin-d --transport http https://dfetcher.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "vitamin-d": {
      "url": "https://dfetcher.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.vitamin-d]
url = "https://dfetcher.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "vitamin-d": {
      "url": "https://dfetcher.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "vitamin-d": {
      "url": "https://dfetcher.com/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

calculate
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), the peak window, and optional 15-min day / monthly year curves. UV index uses a live satellite-driven forecast where available, with a clear-sky fallback.
describe
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 pick the closest match before calling calculate.
geocode
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 default to US unless the caller appends a country code (e.g. "10115, DE"). Falls back to Open-Meteo place-name search for everything else.

Endpoints

URLTransportStateLatencyChecked
https://dfetcher.com/mcp streamable-http answering 149 ms 3 min ago

D Fetcher — questions

Answers built from our own checks of this server.

What can D Fetcher do?
It exposes 3 tools, read directly from the server on our last check. Among them: calculate, describe_skin_types, geocode. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is D Fetcher working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 127 ms. The bar chart above shows every period we have measured.
Is D Fetcher still maintained?
The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.
How do I connect D Fetcher?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does D Fetcher need an API key?
No. D Fetcher completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is D Fetcher?
It answers our handshake in 127 ms on average, which is faster than 78% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.