In-depth architectural comparison of the Mcp Firewall and Mcp Gateway Scan MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Mcp Firewall
Security · Local stdio
Quality: 56/100 (Good) | Auth: No auth required
Mcp Gateway Scan
Security · Local stdio
Quality: 49/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Mcp Firewall if you need specialized Security tools running via a local process. Choose Mcp Gateway Scan if your workspace requires Security integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Choose Mcp Firewall when:
You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Intercepts and filters inbound JSON-RPC tool calls, Enforces YAML-defined allow/deny/redact policies, Detects secret leakage using regex and entropy checks.
Deterministic security proxy (iptables for MCP) that intercepts tool calls, enforces YAML policies, scans for secret leakage, and logs everything. No AI, no cloud.
Read-only static scanner for MCP / agent-gateway production-readiness. The scangateway tool scores a repo across 7 security dimensions (RBAC, fail-closed, supply chain, observability, cost, secrets, prod-readiness). Never executes code or prints secret values.
Category & Scope
Tools & Capabilities Breakdown
Mcp Firewall Tools (6)
Intercepts and filters inbound JSON-RPC tool calls
Enforces YAML-defined allow/deny/redact policies
Detects secret leakage using regex and entropy checks
Logs all requests and responses in JSON Lines format
Supports rate limiting per tool
No AI or cloud dependencies; runs locally as an stdio proxy
Mcp Gateway Scan Tools (6)
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Mcp Firewall is categorized under Security and uses a local stdio subprocess. In contrast, Mcp Gateway Scan belongs to Security using local stdio subprocess. Select Mcp Firewall when you need capabilities focused on security and Mcp Gateway Scan when you require tools for security.