This article addresses a common issue for developers using Paper MCP servers within Docker-based development environments. The problem arises because the MCP client inside the container attempts to connect to the container's local loopback address (127.0.0.1), which does not reach the host machine where the Paper server is running. The solution involves setting up a two-hop `socat` relay: one within the container to forward traffic to the host's Docker gateway IP, and another on the host machine to proxy this connection to the Paper server, ensuring it appears to originate from localhost. AI
IMPACT Niche tooling improvement; minimal industry-wide impact.
RANK_REASON The article provides a technical solution for a specific development tool integration problem.
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