smart-mcp-proxy/mcpproxy-go

brew install --cask smart-mcp-proxy/mcpproxy/mcpproxy (macOS tray app)
sudo apt update && sudo apt install mcpproxy (Debian/Ubuntu apt repo)
sudo dnf install -y mcpproxy (Fedora/RHEL dnf repo)
go install github.com/smart-mcp-proxy/mcpproxy-go/cmd/mcpproxy@latest
Windows/macOS: DMG/EXE installers from GitHub releases

Usage

• •mcpproxy serve — starts HTTP server on :8080 and shows the tray app
• •Edit ~/.mcpproxy/mcp_config.json to register stdio or HTTP upstream MCP servers
• •Point clients at http://localhost:8080/mcp/ (Cursor: Tools & Integrations → Add MCP server; Claude Desktop via npx mcp-remote; also VS Code and Goose)
• •Optional HTTPS: export MCPPROXY_TLS_ENABLED=true, then mcpproxy trust-cert

Key features

• ✓Scale beyond API limits — federate hundreds of MCP servers while bypassing Cursor's 40-tool limit and OpenAI's 128-function cap
• ✓Token savings: agents load one retrieve_tools function instead of hundreds of schemas (~99% token reduction with 43% accuracy improvement claimed)
• ✓Automatic quarantine blocks Tool Poisoning Attacks until servers are manually approved
• ✓Pluggable security scanners (Snyk, Semgrep, Trivy, Cisco) run against quarantined servers; findings normalized to SARIF
• ✓Cross-platform core binary (macOS Intel/Apple Silicon, Windows x64/ARM64, Linux x64/ARM64) with embedded web UI; optional macOS menu-bar app

Best for

Developers and teams running many MCP servers who want one secure endpoint, tool discovery, and quarantine-based review before approving servers.

Caveats

• ⚠HTTPS is optional; HTTP (default) works with Claude Desktop, Cursor, and VS Code
• ⚠Prerelease builds are signed/notarized on macOS but may be unstable
• ⚠Requires a config file (~/.mcpproxy/mcp_config.json) to register upstream servers