Password Breach Check Mcp

io.github.mrfentmenPublished by GitHub account mrfentmenv1.0.0Updated Oct 24, 2026

Check if a password has appeared in known breaches without sending the password. No key required.

The publisher's own server: check.tattoo: tattoo size and placement guide

VerifiedSTDIODesktop onlySecurity & Monitoring

Overview

AI-generated overview

A local MCP server that lets an assistant check whether a password has appeared in known data breaches without sending the password itself.

What you can do
Check whether a password appears in known breach data without transmitting the password itself, according to the registry description. The manifest lists no tools, so the exact operations are not documented. It runs as a local process over stdio and requires no API key.
When to use it
Useful when you want an assistant to help assess whether a password has been exposed in known breaches, for example while reviewing account security, and you prefer a check that does not send the password.
Requirements
Runs as a local process on the user's machine, installed from the npm package password-breach-check-mcp over stdio. No authentication, environment variables or headers are declared. Desktop only; not executable on the web.
Before you install
The description says the password is not sent, but no README or tool list is available to confirm how the check is performed or what data leaves the machine. Treat any password you provide as sensitive and avoid pasting real credentials until you have reviewed the package's behavior.

Installation

In SourceWeft

  1. Open Password Breach Check Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

This repository has no README.

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v1.0.0LatestSep 22, 2026

Score

25% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.

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