Mcp Watchdog

io.github.bountyyfiPublished by GitHub account bountyyfiv0.1.9Updated Oct 24, 2026

MCP security proxy - detects and blocks 40+ MCP attack classes. Zero config.

VerifiedSTDIODesktop onlySecurity & Monitoring

Overview

AI-generated overview

A local MCP security proxy that sits in front of MCP traffic to detect and block more than 40 classes of MCP attacks, with zero configuration.

What you can do
  • Acts as a security proxy for MCP traffic, inspecting requests and responses.
  • Detects and blocks over 40 classes of MCP-specific attacks.
  • Runs with zero configuration, so no policy setup is described.
  • No individual tools are listed, so the assistant-facing surface is not documented.
When to use it
Worth considering when you run other MCP servers and want a local layer that screens their traffic for known MCP attack patterns before trusting them with an assistant.
Requirements
Runs as a local process over stdio, installed from the PyPI package mcp-watchdog, so a Python environment is needed. Desktop only; no web execution. No authentication, environment variables or headers are declared.
Before you install
It inspects MCP traffic, so it sees the data passing through the servers it fronts; review how it handles and stores that data. Detection and blocking behavior, and any false positives that could break legitimate tool calls, are not documented here. No tools, instructions or README are provided, so its exact behavior cannot be verified from this listing.

Installation

In SourceWeft

  1. Open Mcp Watchdog 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.

Tools

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

Version history

1
  1. v0.1.9LatestSep 16, 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.