MCP Servers
HOL Guard
by hashgraph-online
Open-source antivirus and firewall for AI agents: block risky tools, secret access, prompt injection, malicious packages, MCP servers, plugins, and skills at runtime.
Our verdict
We have not reviewed HOL Guard yet
No one at Enterprise DNA has checked this listing against its sources. The description comes from public listings gathered automatically. Any fact below shows where it came from and when it was last checked.
From the listing
About HOL Guard
Open-source antivirus and firewall for AI agents: block risky tools, secret access, prompt injection, malicious packages, MCP servers, plugins, and skills at runtime.
Best for
Developers building Python-based AI agents that need runtime security against common attack vectors.
Use cases
- Enforce runtime security policies on AI agent tool usage
- Prevent prompt injection attacks during agent execution
- Block unauthorized access to secrets or malicious MCP servers
Notes
1,084 stars on GitHub. Last updated 2026-11-10. Licensed Apache-2.0.
Indexed from mcp-official-registry. Verified against the live GitHub repo.
Pros
- Open-source with 1000 stars, indicating community adoption
- Covers multiple attack vectors in one tool
- Runtime enforcement provides real-time protection
Cons
- Python-only, limiting integration with non-Python stacks
- Runtime checks may add latency to agent operations
- Requires configuration to balance security and functionality
Key facts
What we have checked
- Days since the last commit
- 0
- GitHub forks
- 262
- GitHub stars
- 1,084
- Open issues
- 25
- Releases in the last 90 days
- 100
Each value shows when we last confirmed it and where it came from. Values we have not confirmed are left out, never guessed.
How to use
How to set it up
As the listing publishes it. We have not run this install.
Install
pipx install hol-guard && hol-guard initClients the listing names (not checked here)
Claude Code, Cursor, Cline, VS Code, ChatGPT
Install
Add HOL Guard to your client
No install recipe yet. We write one for Claude Code, Claude Desktop, Cursor, VS Code, Codex and ChatGPT when the server is in the official MCP registry with a package or remote address we can use.
Until then, follow the project's own README, or the setup the listing publishes under How to set it up.
Works with
What HOL Guard connects to
No confirmed connections yet. A product appears here when the server's registry name, repo, homepage or name ties it to that product, and a client appears when we have an install recipe for it.
Stars and usage
How HOL Guard is growing
1,012 to 1,084
Health and security
Is HOL Guard looked after, and what do its setup files show
Health score
75 out of 100
| Part | Points | What we saw |
|---|---|---|
| Recent activity | 30 of 30 | Last push 0 days ago |
| Releases | 15 of 15 | 100 releases in 90 days |
| Issue replies | Not counted | The latest check has no issue response reading (fewer than 3 measured issues, or issues switched off) |
| Maintainer | 15 of 15 | Owned by an organisation |
| Official source | 0 of 20 | Community server |
Alternatives
Alternatives to HOL Guard
| Record | Type | How we know | Checked |
|---|---|---|---|
| ActionDockAlternative to this | MCP server | Matched from the listing text | |
| agent-guardAlternative to this | MCP server | Matched from the listing text | |
| agent-immuneAlternative to this | MCP server | Matched from the listing text | |
| AgentGraph TrustAlternative to this | MCP server | Matched from the listing text |
Compare
Compare HOL Guard side by side
Sources
Where this comes from
- GitHubRegistry
A source shows what was published when we checked it. It does not certify security, performance or a working installation. Read our method.
Changelog
What changed
No changes recorded yet. Releases, price changes and deprecations appear here, with their dates, once we track them for this record.
Open-source & AI alternatives
Swap-in tools that solve the same job. Weigh the trade-offs before you commit.
ActionDock
actiondock
Supervise AI-agent API writes over MCP or HTTP while the calling agent remains the orchestrator.
AgentGraph Trust
agentgraph-co
Security scanning and trust verification for AI agent tools.
agent-guard
ipezygj
Safety checks an agent runs before it acts: package malware, destructive command, secret leak.
agent-immune
denial-web
Adaptive threat intelligence for AI agent security — semantic memory, multi-turn escalation, output scanning, rate limiting, and prompt hardening.
Pairs with
Other entries in the index that connect to this one. Click through to see the chain.
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