How do I check if a spring is legally an Onsen?

Use the `validate_onsen_status` tool by providing the water temperature and the dominant mineral type.

Can I calculate how long it takes for water to cool down?

Yes, the `estimate_cooling_duration` tool predicts the time needed to reach a safe bathing temperature based on initial and ambient temperatures.

How is water safety checked?

The `check_ph_safety` tool flags extreme pH levels that require dilution warnings.

Onsen Mineral Classifier MCP Connector for Claude

A+

Classify Japanese hot spring water quality, legal status, and therapeutic benefits.

4 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides deterministic tools for analyzing Japanese hot spring (Onsen) water. It determines if water meets legal Onsen definitions using validate_onsen_status, evaluates health benefits via calculate_therapeutic_profile, predicts cooling times with estimate_cooling_duration, and monitors safety using check_ph_safety.

onsenmineraljapanwater-qualitythermal

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_5aNiTWsCLmVHxws9jI5MWVbSminzeMAaT4SNOhcK/mcp

② Claude Code (terminal)

claude mcp add --transport http onsen-mineral-classifier https://edge.vinkius.com/vk_preview_5aNiTWsCLmVHxws9jI5MWVbSminzeMAaT4SNOhcK/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "onsen-mineral-classifier": {
      "url": "https://edge.vinkius.com/vk_preview_5aNiTWsCLmVHxws9jI5MWVbSminzeMAaT4SNOhcK/mcp"
    }
  }
}

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