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Mastyf AI MCP server

by mastyf-ai·io.github.mastyf-ai/mastyf.ai·v4.1.12·21 stars
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Runtime proxy for MCP security, cost governance & audit

B80/100grade B
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Safety scan
B80/100

full report

Adoption
Growing

21 stars59 downloads/wk

Reviews

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If you have run it, two minutes of your experience saves the next person an afternoon.

Mastyf AI tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-11-08 · same rubric, same numbers if you re-run it

no findings
  • Code scansource not scanned: tarball over 25MB25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 1 days ago15/15
  • Maintainer identityregistry namespace matches repository owner6/10
Overall 80/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Mastyf AI compares

Against every graded Security MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
80/100
higher than 59% of 917 Security servers
GitHub stars
21
more than 93% of 589 Security servers
Downloads a week
59
more than 25% of 386 Security servers with a package

Install Mastyf AI in Claude Code, Cursor or VS Code

Runs npx -y @mastyf_ai/server on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add mastyf.ai -- npx -y @mastyf_ai/server
Add to Cursor

What the publisher says

From the Mastyf AI repository's README, as published. We do not edit it. Read it on GitHub

mastyf.ai

Secure the Action Boundary, Not Just the Prompt.

A local reference monitor and security gateway for AI agents and MCP.Your LLM proposes actions. Mastyf decides whether those actions reach the real world.

Website · Quick start · Policy · Dashboard · GitHub

[!IMPORTANT]

Security Qualification Status: Levels 0–2 passed. Levels 3–5 are not complete (Level 4 physical chaos and Level 5 independent red team remain next/planned). Do not treat enterprise validation as shipped. See reports/enterprisesecurityqualification_report.json.

The problem

AI agents can read your files, push code, query databases, execute shell commands, and call external APIs. They do it autonomously, at machine speed.

Traditional security controls weren't built for that.

Mastyf.ai acts as a perimeter security layer for AI. It intercepts every tool call, evaluates it against your security policies using multi-agent swarm analysis, and blocks malicious or unauthorized actions before they execute.

Every decision is enforced, logged, and auditable.

What it stops

Quick start

🛡️ Mastyf Security Gateway & Protected Agent (Python Quickstart)

Run the local reference monitor, MCP discovery, and plain-English protected agent runtime:

# Install Mastyf Gateway package
git clone https://github.com/mastyf-ai/mastyf.ai.git
cd mastyf.ai/mastyf_gateway
pip install -e .

# Launch Mastyf (Auto-discovers tools, prompts for permissions, and starts protected agent)
mastyf

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Mastyf AI: common questions

Is Mastyf AI MCP server safe?
Mostly: it is graded B (80/100). Read the Mastyf AI safety report
How do I install Mastyf AI?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Mastyf AI need an API key?
Yes. The registry entry asks for ALERT_WEBHOOK_URL.
Is Mastyf AI maintained?
The last commit was 8 days ago (2026-11-07). The latest release is v4.1.12.
What can I use instead of Mastyf AI?
Servers from other publishers that do the same job: Bastion MCP server, Wireshark MCP server and MCPProxy MCP server. Compare all Mastyf AI alternatives.
How does Mastyf AI compare with other Security MCP servers?
safety score 80/100 (higher than 59% of 917 Security servers); github stars 21 (more than 93% of 589 Security servers); downloads a week 59 (more than 25% of 386 Security servers with a package). Full comparison.

Alternatives to Mastyf AI

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