Mcp Watchdog
Put a security proxy in front of your MCP servers to block common agent-tool abuse patterns before they hit production integrations.
Overview
MCP Watchdog is a MCP server for the Ship phase that acts as a security proxy detecting and blocking 40+ classes of MCP attacks with zero-config setup.
What is this MCP server?
- MCP security proxy with detection and blocking for 40+ MCP attack classes
- Zero-config positioning in registry description—aimed at drop-in stdio wrapping
- PyPI package mcp-watchdog v0.1.9 with stdio transport
- Sits between your agent client and downstream MCP servers as a guard layer
- Focused on MCP protocol abuse, not general network firewalling
- Detects and blocks 40+ MCP attack classes (per registry description)
- Registry version 0.1.9
What problem does it solve?
Every new MCP server you attach is another path for tool poisoning, data exfiltration, and injection—hard to audit one by one as a solo builder.
Who is it for?
Indie builders running several untrusted or community MCP servers who want a stdio proxy guard without building custom policy code.
Skip if: Teams that only need static SAST on repositories, or environments already covered by enterprise MCP gateways with centralized policy.
What do I get? / Deliverables
After routing traffic through Watchdog, risky MCP request patterns can be blocked before they reach your downstream tools.
- Proxy layer that evaluates MCP traffic against 40+ attack classes
- Blocked or allowed tool calls before they reach inner MCP servers
Recommended MCP Servers
Journey fit
How it compares
MCP traffic security proxy, not a code-review skill or generic vulnerability scanner.
Common Questions / FAQ
Who is io.github.bountyyfi/mcp-watchdog for?
It is for solo developers and small teams that rely on multiple MCP tools and need a lightweight proxy to block MCP-specific attack patterns.
When should I use io.github.bountyyfi/mcp-watchdog?
Use it during ship and security hardening when you connect agents to real data via MCP and want guardrails before going live.
How do I add io.github.bountyyfi/mcp-watchdog to my agent?
Install the PyPI package mcp-watchdog and place it in your MCP stdio chain so agent traffic passes through the proxy to downstream servers.