Umbryn MCP Server

by rinava Your server? Claim it

local only

Umbryn MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 120 installs a week from pypi. Last commit 14 Aug 2026.

Redacts PII/PHI from text before it reaches an LLM. Fail-closed, self-hosted, no egress.

Installs per day peak 85 · avg 27 · -28% w/w

a month agotoday

120

Installs / week

pypi · umbryn-mcp

Stars

4 open issues

14 Aug 2026

Last commit

0 releases in 90 days

MIT

License

Python

Nothing serious here today

Today is the operative word: we check Umbryn MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add umbryn-mcp -- uvx umbryn-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "umbryn-mcp": {
      "args": [
        "umbryn-mcp"
      ],
      "command": "uvx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.umbryn-mcp]
command = "uvx"
args = ["umbryn-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "umbryn-mcp": {
      "args": [
        "umbryn-mcp"
      ],
      "command": "uvx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "umbryn-mcp": {
      "args": [
        "umbryn-mcp"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: UMBRYN_ENGINE (Detection engine: auto (default), regex, or presidio), UMBRYN_MIN_CONFIDENCE (Trust threshold (0-1); detections below it fail closed. Default 0.5), UMBRYN_DETECTION_FLOOR (Sensitivity floor (0-1); below this a signal is noise. Default 0.35). The author declared them in the registry entry; get the values from the project itself.

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Umbryn MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Umbryn MCP?

Umbryn MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package umbryn-mcp was installed 120 times last week.

How do I connect Umbryn MCP?

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 runs locally, so the command pulls umbryn-mcp straight from pypi; nothing to host, nothing to sign up for.

How many people use Umbryn MCP?

The pypi package umbryn-mcp was installed 120 times in the last week. Week over week that is -28%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Umbryn MCP open source?

Yes — it is published under the MIT licence, written in Python, 0 stars on GitHub and 4 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.