{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"awesome-mcp-guardian","slug":"mcp-guardian","name":"mcp-guardian","type":"mcp","url":"https://github.com/eqtylab/mcp-guardian","page_url":"https://unfragile.ai/mcp-guardian","categories":["mcp-servers"],"tags":[],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"awesome-mcp-guardian__cap_0","uri":"capability://tool.use.integration.mcp.server.proxy.interception.with.message.logging","name":"mcp server proxy interception with message logging","description":"Implements a transparent proxy layer (mcp-guardian-proxy binary) that sits between LLM applications and MCP servers, intercepting all bidirectional JSON-RPC messages over stdio/WebSocket transports. The proxy maintains complete audit trails by logging every message to persistent storage before forwarding, enabling forensic analysis of LLM-to-tool interactions without modifying the LLM application itself.","intents":["I need to audit every tool call my LLM makes to external services for compliance and debugging","I want a complete message history of what my Claude Desktop instance requested from MCP servers","I need to understand the exact JSON-RPC payloads being exchanged without instrumenting the LLM code"],"best_for":["Enterprise teams requiring audit trails for regulated LLM deployments","Security-conscious developers building multi-agent systems","Teams debugging complex MCP server interactions"],"limitations":["Proxy adds latency to every message round-trip (exact overhead depends on logging I/O performance)","Requires explicit proxy configuration in LLM application (e.g., Claude Desktop config.json) — not transparent to all MCP clients","Message logging to disk can consume significant storage for high-volume tool usage; no built-in log rotation or compression","Stdio-based transport only for local proxying; WebSocket support status unclear from architecture docs"],"requires":["MCP-compatible LLM application (Claude Desktop, custom LLM client)","Rust runtime or pre-built mcp-guardian-proxy binary","Writable filesystem for JSON log storage","MCP server endpoints accessible from proxy host"],"input_types":["JSON-RPC 2.0 messages (tool calls, resource requests, prompts)","MCP server configuration (name, command, arguments)"],"output_types":["JSON log files with timestamped message records","Structured audit trail with request/response pairs"],"categories":["tool-use-integration","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_1","uri":"capability://safety.moderation.real.time.message.approval.workflows.with.human.in.the.loop","name":"real-time message approval workflows with human-in-the-loop","description":"Implements a guard profile system that intercepts MCP messages matching configurable rules and routes them to approval queues in the desktop UI or CLI, blocking execution until a human approves or rejects the request. The proxy suspends message forwarding at the JSON-RPC level, maintaining connection state while awaiting approval decisions that are persisted and can be replayed for audit purposes.","intents":["I want to manually approve high-risk tool calls (e.g., file deletion, API calls) before my LLM executes them","I need to prevent certain MCP servers from being called without explicit user consent","I want to review and modify tool call parameters before they reach the MCP server"],"best_for":["Non-technical users running LLM agents with external tool access","Teams with security policies requiring human approval for sensitive operations","Developers building safety-critical LLM applications"],"limitations":["Approval workflows introduce blocking latency — LLM execution pauses until human decision (no timeout mechanism mentioned)","Guard profiles are static configuration; no dynamic rule updates without restarting proxy","No built-in escalation or delegation — single approval queue without role-based access control","Approval decisions are not reversible once executed; no rollback mechanism for approved but harmful requests"],"requires":["Desktop application (Tauri + React) or CLI running to process approval queue","Guard profile configuration defining which messages require approval","Active user session to interact with approval UI"],"input_types":["JSON-RPC tool call messages","Guard profile rules (pattern matching on tool name, parameters, server)"],"output_types":["Approval/rejection decision","Modified message parameters (if approval UI allows editing)","Audit record of approval decision with timestamp and approver identity"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_10","uri":"capability://tool.use.integration.json.rpc.message.format.preservation.and.protocol.compliance","name":"json-rpc message format preservation and protocol compliance","description":"Maintains strict JSON-RPC 2.0 protocol compliance throughout the proxy pipeline, preserving message structure, method names, and parameter types without transformation or reinterpretation. The proxy operates as a transparent intermediary that logs and filters messages while maintaining protocol semantics, ensuring compatibility with any MCP server implementation that follows the specification.","intents":["I want to ensure my MCP servers receive unmodified JSON-RPC messages from the proxy","I need the proxy to work with any MCP server implementation without custom adapters","I want to replay recorded messages for testing without protocol translation"],"best_for":["Teams with heterogeneous MCP server implementations","Organizations requiring strict protocol compliance for interoperability","Developers building MCP server implementations"],"limitations":["Protocol compliance limits transformation capabilities; complex message rewriting not possible","Message filtering must operate on JSON-RPC structure; semantic understanding of tool parameters limited","No protocol version negotiation; assumes all servers implement same JSON-RPC version","Binary or non-JSON transport protocols not supported"],"requires":["MCP servers implementing JSON-RPC 2.0 specification","Proxy configured to preserve message structure"],"input_types":["JSON-RPC 2.0 messages (method, params, id, jsonrpc fields)"],"output_types":["Identical JSON-RPC 2.0 messages (with optional filtering/logging)"],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_11","uri":"capability://tool.use.integration.stdio.and.websocket.transport.support.for.mcp.server.communication","name":"stdio and websocket transport support for mcp server communication","description":"Implements proxy support for both stdio-based (local process) and WebSocket-based (remote server) MCP transport mechanisms, enabling the proxy to intercept and manage connections to both local and remote MCP servers. The proxy abstracts transport differences at the JSON-RPC message level, allowing guard profiles and approval workflows to operate uniformly across transport types.","intents":["I want to manage both local MCP servers (stdio) and remote MCP servers (WebSocket) from a single proxy","I need to apply the same guard profiles to local and remote MCP servers","I want to audit communications with remote MCP servers hosted on different machines"],"best_for":["Teams with mixed local and remote MCP server deployments","Organizations running MCP servers in containers or cloud environments","Developers building distributed LLM applications"],"limitations":["WebSocket support status unclear from architecture docs; may be incomplete or experimental","Transport-specific issues (network latency, connection drops) may affect approval workflow responsiveness","No built-in connection pooling or multiplexing for multiple concurrent WebSocket connections","TLS/SSL configuration for WebSocket connections not detailed"],"requires":["Stdio support: Local MCP server executable","WebSocket support: Remote MCP server with WebSocket endpoint","Network connectivity for WebSocket-based servers"],"input_types":["MCP server configuration (command for stdio, URL for WebSocket)","Transport-specific parameters (environment variables for stdio, credentials for WebSocket)"],"output_types":["JSON-RPC messages from either transport type","Unified message logs regardless of transport"],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_2","uri":"capability://safety.moderation.guard.profile.policy.based.message.filtering.and.transformation","name":"guard profile policy-based message filtering and transformation","description":"Defines a declarative rule system (stored as JSON in mcp-guardian-core) that matches incoming MCP messages against patterns (tool name, parameter values, server identity) and applies transformations or blocks. Profiles are evaluated by the proxy before message forwarding, enabling automated security policies like blocking dangerous tools, redacting sensitive parameters, or enforcing rate limits without human intervention.","intents":["I want to automatically block calls to certain MCP tools (e.g., shell execution, file deletion) across all LLM sessions","I need to redact sensitive data from tool parameters before they reach external servers","I want to enforce rate limits on specific MCP servers to prevent abuse"],"best_for":["Platform teams managing shared LLM infrastructure with consistent security policies","Organizations with compliance requirements (PCI-DSS, HIPAA) requiring automated controls","Developers building multi-tenant LLM applications"],"limitations":["Guard profiles use static pattern matching; no context-aware rules based on LLM conversation history or user identity","Transformation rules are limited to blocking and parameter redaction; no complex message rewriting or synthesis","No built-in conflict resolution when multiple profiles match the same message","Profile changes require proxy restart; no hot-reload capability for dynamic policy updates"],"requires":["Guard profile JSON configuration file","Pattern matching syntax understanding (exact syntax not detailed in architecture docs)","Proxy restart to apply profile changes"],"input_types":["Guard profile rules (JSON)","MCP message metadata (tool name, parameters, server identity)"],"output_types":["Filtered/transformed message or block decision","Audit record of policy application"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_3","uri":"capability://automation.workflow.multi.server.configuration.management.with.namespace.organization","name":"multi-server configuration management with namespace organization","description":"Provides a centralized configuration system (mcp-guardian-core library) that manages multiple MCP server definitions, guard profiles, and server collections using a namespace-based hierarchy stored as JSON files. The system enables grouping related servers into collections, applying guard profiles to collections, and managing configurations via desktop UI, CLI, or programmatic API without manual file editing.","intents":["I want to manage 10+ MCP servers with different configurations from a single interface","I need to apply the same guard profile to a group of related MCP servers","I want to version control my MCP server configurations and switch between environments (dev/prod)"],"best_for":["Teams managing multiple MCP servers across different environments","Organizations with complex MCP deployments requiring centralized governance","DevOps teams automating MCP infrastructure provisioning"],"limitations":["File-based JSON storage has no built-in concurrency control; simultaneous edits from multiple UIs can cause data loss","No built-in versioning or rollback mechanism; configuration changes are not tracked","Namespace hierarchy is flat; no nested organization for large deployments","No secret management integration; sensitive credentials (API keys, tokens) stored in plaintext JSON"],"requires":["Writable filesystem for JSON configuration storage","Desktop application or CLI to manage configurations","Understanding of namespace and collection concepts"],"input_types":["MCP server definitions (name, command, arguments, environment variables)","Guard profile rules","Server collection definitions"],"output_types":["JSON configuration files","Structured configuration objects accessible to proxy and UIs"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_4","uri":"capability://automation.workflow.desktop.gui.for.real.time.message.monitoring.and.approval","name":"desktop gui for real-time message monitoring and approval","description":"Implements a Tauri-based desktop application with React frontend that provides a graphical interface for viewing live MCP message streams, managing server configurations, and processing approval queues. The UI connects to the proxy via IPC or local API, displaying timestamped message logs with filtering/search, allowing users to approve/reject pending messages and edit guard profiles without CLI knowledge.","intents":["I want to visually monitor what MCP servers my LLM is calling in real-time","I need a user-friendly way to approve tool calls without using the command line","I want to search and filter message logs to debug specific tool interactions"],"best_for":["Non-technical users managing LLM agents","Teams requiring visual audit trails for compliance reviews","Developers debugging MCP server interactions"],"limitations":["Tauri desktop application requires native installation; no web-based access or remote monitoring","Message filtering/search operates on local logs only; no full-text indexing for large datasets","UI responsiveness may degrade with high message volume (no pagination or virtualization mentioned)","Configuration changes in UI require proxy restart to take effect"],"requires":["Desktop OS (Windows, macOS, Linux) with Tauri runtime support","Proxy running locally or accessible via network","Node.js 18+ and Yarn for development builds"],"input_types":["Live MCP message stream from proxy","Configuration objects from mcp-guardian-core","User interactions (approve/reject buttons, configuration edits)"],"output_types":["Rendered message logs with metadata","Approval/rejection decisions","Updated configuration files"],"categories":["automation-workflow","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_5","uri":"capability://automation.workflow.command.line.interface.for.scripted.configuration.management","name":"command-line interface for scripted configuration management","description":"Implements a Rust-based CLI tool (mcp-guardian-cli) that enables programmatic management of MCP servers, guard profiles, and server collections via command-line arguments and stdin. The CLI directly uses mcp-guardian-core library, enabling automation workflows like CI/CD pipelines to provision MCP configurations, apply policies, and validate setups without GUI interaction.","intents":["I want to automate MCP server provisioning in my CI/CD pipeline","I need to apply guard profiles to multiple servers via a shell script","I want to validate MCP configurations before deploying to production"],"best_for":["DevOps engineers automating MCP infrastructure","Teams using infrastructure-as-code (Terraform, Ansible) for LLM deployments","Developers building custom MCP management tools"],"limitations":["CLI interface design not detailed in architecture docs; command syntax and options unknown","No built-in output formatting options (JSON, YAML, table) mentioned","CLI operates on local filesystem only; no remote server management capability","No interactive mode for guided configuration; purely command-driven"],"requires":["Rust runtime or pre-built mcp-guardian-cli binary","Writable filesystem for configuration storage","Understanding of CLI command syntax"],"input_types":["Command-line arguments","Configuration files (JSON)","Stdin input for bulk operations"],"output_types":["Configuration files","Status messages","Exit codes for automation"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_6","uri":"capability://tool.use.integration.claude.desktop.integration.with.proxy.configuration","name":"claude desktop integration with proxy configuration","description":"Enables MCP Guardian to act as a proxy for Claude Desktop by configuring the LLM application to route MCP server connections through the guardian proxy. The integration is configured via Claude Desktop's config.json file, allowing users to transparently add message logging, approval workflows, and guard profiles to their existing Claude Desktop setup without modifying the LLM application itself.","intents":["I want to add message approval workflows to my Claude Desktop without modifying the application","I need to audit all MCP tool calls made by Claude Desktop","I want to apply security policies to Claude Desktop's MCP server access"],"best_for":["Claude Desktop users requiring audit and approval capabilities","Organizations standardizing on Claude Desktop with security requirements","Teams migrating from uncontrolled MCP access to managed proxy setup"],"limitations":["Requires manual configuration of Claude Desktop config.json; no automated setup wizard","Proxy must be running before Claude Desktop starts; no automatic proxy lifecycle management","Only works with Claude Desktop; no integration with other LLM applications mentioned","Configuration changes require Claude Desktop restart to take effect"],"requires":["Claude Desktop installed and configured","mcp-guardian-proxy running locally","Write access to Claude Desktop config.json","Understanding of MCP server configuration syntax"],"input_types":["Claude Desktop config.json with MCP server definitions","Proxy configuration (port, guard profiles)"],"output_types":["Modified config.json with proxy endpoints","Proxy connection established to Claude Desktop"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_7","uri":"capability://safety.moderation.message.approval.decision.persistence.and.audit.trail","name":"message approval decision persistence and audit trail","description":"Stores all approval/rejection decisions made by users in persistent JSON storage alongside the original messages, enabling audit trails that link decisions to specific messages and approvers. The system maintains immutable records of what was approved, when, and by whom, supporting compliance requirements and post-incident analysis without requiring external audit logging systems.","intents":["I need to prove that a specific tool call was approved before execution for compliance audits","I want to analyze approval patterns to identify risky tool calls that are frequently approved","I need to track which user approved a specific message for accountability"],"best_for":["Regulated industries (finance, healthcare) requiring immutable audit trails","Teams with compliance requirements (SOC 2, ISO 27001)","Organizations conducting security incident investigations"],"limitations":["Audit trail stored in JSON files with no tamper-detection or cryptographic signing","No built-in data retention policies; audit logs grow indefinitely without manual cleanup","Approver identity tracking not detailed; may not capture user identity in multi-user scenarios","No integration with external audit logging systems (Splunk, ELK, CloudTrail)"],"requires":["Writable filesystem for audit log storage","User identity tracking mechanism (not detailed in architecture)","Sufficient disk space for long-term audit retention"],"input_types":["Approval/rejection decisions from UI","Original MCP messages","User identity (if available)"],"output_types":["JSON audit records with timestamp, decision, approver, message content","Audit trail queryable by message ID, timestamp, or approver"],"categories":["safety-moderation","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_8","uri":"capability://automation.workflow.server.collection.grouping.with.bulk.policy.application","name":"server collection grouping with bulk policy application","description":"Enables organizing multiple MCP servers into named collections (e.g., 'data-access', 'external-apis') and applying guard profiles to entire collections at once. The system stores collection definitions in JSON and evaluates them at proxy runtime, enabling bulk policy updates without individually configuring each server and supporting environment-specific groupings (dev/staging/prod).","intents":["I want to apply the same guard profile to all my data-access servers without configuring each one individually","I need to disable all external API servers in production while keeping them enabled in development","I want to organize my 20+ MCP servers into logical groups for easier management"],"best_for":["Teams managing large numbers of MCP servers (10+)","Organizations with environment-specific policies (dev/staging/prod)","DevOps teams automating bulk policy changes"],"limitations":["Collections are static groupings; no dynamic membership based on server properties or tags","No nested collections; hierarchy is flat with no sub-grouping capability","Policy conflicts when a server belongs to multiple collections with different profiles are not resolved","Collection changes require proxy restart; no hot-reload for collection membership updates"],"requires":["Server collection definitions in JSON configuration","Guard profiles to apply to collections","Proxy restart to apply collection changes"],"input_types":["Server collection definitions (name, member servers)","Guard profiles to apply"],"output_types":["Bulk policy application to collection members","Configuration files reflecting collection-based policies"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-guardian__cap_9","uri":"capability://automation.workflow.nix.based.reproducible.build.system.for.cross.platform.deployment","name":"nix-based reproducible build system for cross-platform deployment","description":"Uses Nix package manager to define reproducible development environments and build configurations that work consistently across Windows, macOS, and Linux. The build system manages Rust toolchain versions, Node.js dependencies, and system libraries, enabling developers to build mcp-guardian components without manual dependency installation and supporting automated CI/CD builds with guaranteed reproducibility.","intents":["I want to build mcp-guardian on my machine with the exact same dependencies as CI/CD","I need to deploy mcp-guardian across Windows, macOS, and Linux with consistent behavior","I want to contribute to mcp-guardian without spending hours setting up the development environment"],"best_for":["Teams using Nix for infrastructure management","Open-source projects requiring reproducible builds","Organizations with multi-platform deployment requirements"],"limitations":["Nix has steep learning curve; not familiar to developers from non-Nix backgrounds","Nix package cache may be incomplete for some dependencies; builds may require compilation from source","Windows support in Nix is limited; WSL or native Nix on Windows may have issues","Nix flakes (modern approach) are still experimental; legacy Nix expressions may be used"],"requires":["Nix package manager installed (https://nixos.org/download.html)","Nix flakes enabled (if using flake-based configuration)","Understanding of Nix language and package management"],"input_types":["Nix flake configuration files","Source code (Rust, TypeScript)"],"output_types":["Pre-built binaries for mcp-guardian-proxy, mcp-guardian-cli","Desktop application bundles (Tauri)","Development environment with all dependencies"],"categories":["automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":31,"verified":false,"data_access_risk":"high","permissions":["MCP-compatible LLM application (Claude Desktop, custom LLM client)","Rust runtime or pre-built mcp-guardian-proxy binary","Writable filesystem for JSON log storage","MCP server endpoints accessible from proxy host","Desktop application (Tauri + React) or CLI running to process approval queue","Guard profile configuration defining which messages require approval","Active user session to interact with approval UI","MCP servers implementing JSON-RPC 2.0 specification","Proxy configured to preserve message structure","Stdio support: Local MCP server executable"],"failure_modes":["Proxy adds latency to every message round-trip (exact overhead depends on logging I/O performance)","Requires explicit proxy configuration in LLM application (e.g., Claude Desktop config.json) — not transparent to all MCP clients","Message logging to disk can consume significant storage for high-volume tool usage; no built-in log rotation or compression","Stdio-based transport only for local proxying; WebSocket support status unclear from architecture docs","Approval workflows introduce blocking latency — LLM execution pauses until human decision (no timeout mechanism mentioned)","Guard profiles are static configuration; no dynamic rule updates without restarting proxy","No built-in escalation or delegation — single approval queue without role-based access control","Approval decisions are not reversible once executed; no rollback mechanism for approved but harmful requests","Protocol compliance limits transformation capabilities; complex message rewriting not possible","Message filtering must operate on JSON-RPC structure; semantic understanding of tool parameters limited","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.49,"ecosystem":0.39999999999999997,"match_graph":0.25,"freshness":0.52,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.15,"match_graph":0.23,"freshness":0.12}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-06-17T09:51:03.578Z","last_scraped_at":"2026-05-03T14:00:18.053Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=mcp-guardian","compare_url":"https://unfragile.ai/compare?artifact=mcp-guardian"}},"signature":"8udQ6nOlmYlNeWrrBuIgPTTTYGe8rss2rV73xicFFINHLQW/Yl+GNN/n3gOjRiaaeJIw+qPHMM/Khonk9nQYBg==","signedAt":"2026-06-23T07:09:56.739Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/mcp-guardian","artifact":"https://unfragile.ai/mcp-guardian","verify":"https://unfragile.ai/api/v1/verify?slug=mcp-guardian","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}