iptables for MCP — blocks dangerous tool calls, scans for secrets, logs everything.
iptables for MCP — blocks dangerous tool calls, scans for secrets, logs everything.
Sits between your AI coding tool (Claude Code, Cursor, Windsurf) and MCP servers, intercepting every JSON-RPC message and enforcing YAML-defined policies.
Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| name | block-ssh-keys |
| filesystem-mcp.yaml | restricts reads/writes/listings to ${PROJECT_DIR}, blocks dotfiles and traversal |
| github-mcp.yaml | logs all file reads, blocks broad private repo enumeration |
| shell-mcp.yaml | adds network command and package install blocks |
| regex | Regular expression test on the value |
| pattern | Glob pattern (uses [minimatch](https://github.com/isaacs/minimatch)) |
| not_under | Matches if path is NOT under the given directory. Supports ${HOME}, ${PROJECT_DIR} |
| secrets | When true, runs the secret scanner on the value |
| server | Glob pattern on the server name |
| response_contains | Case-insensitive substring match against response text |
| response_contains_regex | Regex match against response text |
{
"mcpServers": {
"MCP_DOCKER": {
"command": "docker",
"args": ["mcp", "gateway", "run"]
}
}
}Configuration as documented by the project. Restart the client after saving.
Read, search and edit files inside allowed directories with the Model Context Protocol reference Filesystem server.
Retrieve version-aware library documentation and code examples with Context7 MCP, using resolve-library-id and query-docs.
Use Microsoft’s Playwright MCP server to navigate pages, inspect accessibility snapshots, fill forms and capture browser screenshots.
Connect GitHub MCP to repositories, issues and pull requests with GitHub’s hosted service or a locally run server.
Use the Supabase MCP server to inspect database schemas, query project data and retrieve docs through a project-scoped connection.
Search Linear issues and projects, inspect work context and manage updates through Linear’s hosted MCP server with OAuth.