Bypass Claude Code Login on Windows: Direct Third-Party API Connection Guide

Claude Code on Windows: A Complete Guide to Using Third-Party APIs Without Login Core Question of This Article: How can I bypass the official OAuth login process in Claude Code on a Windows system and connect directly via a third-party API proxy? Claude Code, the CLI programming assistant developed by Anthropic, typically guides users through an OAuth-based browser login by default. However, under the hood, the tool is strictly API-driven. For developers who prefer using OpenRouter, OneAPI, LiteLLM, or their own self-hosted proxies, this official login can be bypassed entirely through environment variables. This guide provides a comprehensive, step-by-step walkthrough …