How to Connect Codex to DeepSeek via CC Switch Local Routing

This guide explains why Codex’s Responses API cannot call DeepSeek’s Chat Completions directly, and provides a step‑by‑step configuration of CC Switch as a local router that translates between the two protocols, including preparation, provider setup, route activation, troubleshooting, and safety considerations.

API integrationCodexDeepSeek

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How to Connect Codex to DeepSeek via CC Switch Local Routing

Refining Core Development Skills

Jun 1, 2021 · Fundamentals

Why Accessing a Local Server via 127.0.0.1 Is Not Faster Than Using the Machine’s Own IP

Accessing a service on the same host using 127.0.0.1 offers no performance advantage over using the host’s own IP address because the Linux kernel routes both destinations through the loopback interface, as demonstrated by source‑code analysis and packet‑capture experiments.

IP addressLocal routingloopback

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Why Accessing a Local Server via 127.0.0.1 Is Not Faster Than Using the Machine’s Own IP