Claude MCP Hub

As Claude Desktop runs across multiple devices, Claude Code gets scattered across multiple environments, and the number of MCP servers to use keeps growing, sharing configurations and managing per-project tool scope has become complicated.

To solve this problem, Arc Relay has been open-sourced. It has already been used in production in a compliance product, and it's licensed under MIT.

At its core, it's a control plane that sits between AI clients and MCP servers.

• RBAC: Not-overly-complex permission management, tool-level permissions, automatic read/write/admin classification
• Centralized execution: Individual MCPs run on Docker, with remote calls and OAuth server/client all managed in one place
• Connection automation: Designed with the mcp-sync CLI and skills to make it easy to pull in the tools needed per project
• Middleware: You can insert an LLM between tool calls to optimize context, or add intermediate processing like a PII sanitizer and webhooks

The tech stack is Go, and it targets everyone from solo developers to small and medium-sized organizations. The author describes it not as a replacement for Docker MCP Gateway or IBM ContextForge, but as a practical middle ground between them.