
HOL Guard sits between AI coding agents and their tools to intercept risky reads, installs, MCP registrations, and config changes before execution.
HOL Guard sits between AI coding agents and their tools to intercept risky reads, installs, MCP registrations, and config changes before execution.
HOL Guard is a local-first runtime security layer that wraps AI coding agents such as Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw, scanning every command they attempt before it runs. It intercepts shell commands, secret reads, MCP server registrations, and config or hook changes, showing a diff so the developer can approve or deny with one keystroke. Scans run on-device in under 50 ms with no network call, and the tool ships as a pipx-installable daemon that leaves no background services when uninstalled. Guard is free forever for local scanning on one machine, with paid Guard Cloud tiers that sync decision receipts across machines, add alerts, and enforce team policies. The maker, HOL, also publishes a companion plugin-scanner for maintainers so extension packages can be verified in CI before release.

HOL Guard is an advanced security layer that operates between AI coding agents and their development tools. It proactively intercepts potential threats by monitoring and blocking risky reads, installations, MCP registrations, and configuration changes before they can execute, ensuring a safer coding environment.
HOL Guard functions as a protective barrier, effectively analyzing the behavior of AI coding agents. For instance, when an AI tool attempts to install software or modify system configurations, HOL Guard evaluates the request's safety. If it detects any potential risks—such as unauthorized changes or malicious code—it blocks the execution, thereby safeguarding the system.
This capability is crucial in environments where AI tools are extensively used for coding, as these tools can inadvertently introduce vulnerabilities. By monitoring actions like file reads and software installations, HOL Guard ensures that only safe operations are permitted. This real-time protection reduces the risk of security breaches and system malfunctions, making it an essential tool for organizations leveraging AI in their development processes.
HOL Guard enhances software security by intercepting commands before execution, scanning locally without internet dependency, and facilitating one-keystroke approvals. It integrates with various coding environments to prevent unauthorized actions, manage configurations, and maintain policy consistency across devices, ensuring developers work safely and efficiently.
HOL Guard operates through a multi-faceted approach to software security, focusing on real-time command monitoring and user-friendly approval processes:
Pre-execution Interception: HOL Guard wraps agent launch commands, allowing developers to review potential risks associated with operations such as file reads, installations, and configuration changes. By presenting these as a reviewable diff, it ensures that developers can identify and mitigate risks before execution.
Under 50 ms Local Scan: The tool conducts all scanning processes on-device, eliminating the need for outbound network calls. This feature significantly speeds up workflows and allows developers to work offline without sacrificing security.
One-keystroke Approval Flow: Each potential action is displayed on the screen as a diff, enabling developers to approve or deny actions with a single keystroke. This decision is recorded in a local receipt, providing a clear audit trail.
Multi-Harness Support: HOL Guard integrates seamlessly with various coding environments, including Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw. This integration allows for consistent security policies across different agents and environments.
Guard Cloud Sync: For teams that require cross-device functionality, HOL Guard offers an optional cloud sync. This feature ensures decision receipts, alerts, and audit histories are synchronized across devices while never compromising sensitive data by uploading file contents or environment variables.
HOL Guard features include pre-execution interception to review risky actions, a local scan process for fast scanning without internet dependence, a one-keystroke approval flow for easy decisions, multi-harness support for various AI tools, and optional Guard Cloud Sync for decision management across devices.
HOL Guard is designed to enhance security and usability in AI tool deployments. The pre-execution interception feature allows developers to review any commands that could lead to risky changes, such as installations or configurations, by presenting a comparison (diff) before execution. This ensures that any potential issues are identified and resolved upfront, significantly reducing the risk of unexpected behavior.
The under 50 ms local scan functionality is crucial for maintaining workflow efficiency. By performing scans on-device, HOL Guard eliminates the need for outbound network calls, allowing the agent to function seamlessly, even in offline environments. This is particularly beneficial in scenarios where network reliability is a concern.
The one-keystroke approval flow streamlines the decision-making process. Each action requiring approval displays the relevant diff on-screen, enabling developers to allow or deny actions with a single keystroke. This not only speeds up workflows but also maintains a record of decisions through local receipt generation, ensuring accountability.
Additionally, HOL Guard supports multiple AI harnesses, including Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw. This multi-harness support ensures that a unified policy engine can manage various agents, simplifying the integration process for developers working with different tools.
For those who require additional data management capabilities, Guard Cloud Sync offers an optional cloud tier that syncs decision receipts, alerts, and audit histories across multiple devices. Importantly, this feature ensures that sensitive data, like file contents or environment variables, are never uploaded, maintaining user privacy.
HOL Guard is designed for developers and teams seeking enhanced security in their coding environments. It protects against secret exfiltration, verifies the security of new server registrations, enforces configuration approvals, maintains team-wide policy control, and ensures cross-device continuity for seamless development.
HOL Guard serves a diverse audience, particularly software developers and IT teams concerned with securing their coding practices. Here’s a breakdown of its primary features:
Blocking Secret Exfiltration: HOL Guard actively monitors automated tasks to stop coding agents from accessing sensitive files like .npmrc, .env, or cloud credentials. This prevents unauthorized data leaks that could compromise security.
Guarding MCP Installs: When new server registrations are added to the harness, HOL Guard reviews them for insecure HTTP endpoints or wildcard binds. This proactive measure ensures that only secure configurations are deployed, reducing the risk of vulnerabilities in the infrastructure.
Enforcing Config Approvals: With HOL Guard, any proposed edits to configurations or hooks by coding agents require explicit approval. This feature is crucial in preventing unexpected supply-chain changes that could disrupt workflows or introduce security risks.
Team-wide Policy Control: HOL Guard allows teams to implement a consistent policy pack across all members. This ensures that every developer’s coding session adheres to the same security rules, fostering a uniform security posture within the team.
Cross-device Continuity: By syncing approval history through Guard Cloud, developers can switch devices without losing their safe action approvals. This feature enhances flexibility and efficiency, allowing developers to maintain productivity regardless of their working environment.
HOL Guard offers a free tier for basic use, while its paid plans start at $10 per month, providing access to advanced features such as enhanced security protocols, custom alerts, and priority support. Users can choose from various pricing options based on their needs.
HOL Guard is designed to cater to a wide range of users, from individuals seeking basic security to businesses needing robust protection. The free tier includes essential features such as basic monitoring and alerts, allowing users to evaluate the service without financial commitment.
For those who require more, HOL Guard’s paid plans begin at $10 per month. These plans unlock several advanced features, including:
HOL Guard also offers tiered pricing options, allowing users to select a plan that best fits their requirements, whether for personal use or organizational needs.
To get started with HOL Guard, visit https://hol.org/guard to sign up for an account. Once registered, you can explore the features and functionalities of HOL Guard, including its security tools and user interface designed for optimizing your digital experience.
Starting with HOL Guard is straightforward. Here’s a step-by-step guide:
Use cases for HOL Guard include protecting personal data, securing business transactions, and monitoring network activities. Whether you're an individual user or a business, HOL Guard provides comprehensive tools to enhance your online security.
Browse by use case: Code Generation
Compare HOL Guard: vs Speech To Markdown · vs FluentDB · vs ReExplain · vs YC Has It