D Fetcher MCP Server

by dfetcher Your server? Claim it

answering

D Fetcher is answering right now. Last checked 1 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 91 days of history · worst day 91%

91 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

160 ms

Response time

average over 24h

open, no key

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

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

{
  "servers": {
    "vitamin-d": {
      "type": "http",
      "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

URL	Transport	State	Latency	Checked
https://dfetcher.com/mcp	streamable-http	answering	170 ms	1 min ago

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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 92 of 92 checks got a reply (100.0%), average response time 160 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 in the form 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 160 ms on average, which is faster than 80% 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.