Fix Claude Code OAuth Error 500: Causes and Solutions

📰 Dev.to AI

Learn to fix Claude Code OAuth Error 500 by understanding its causes and applying verified solutions such as cache clearing and session reset.

intermediate Published 14 Apr 2026

Action Steps

Identify the cause of the OAuth error 500
Clear the cache at ~/.claude/cache
Start a new conversation session
Update Claude Code to the latest version
Verify authentication handshake between browser and CLI

Who Needs to Know This

Developers and engineers working with Claude Code and OAuth authentication can benefit from this guide to resolve common errors and improve their productivity.

Key Insight

💡 OAuth error 500 occurs when the authentication handshake between the browser and CLI fails, and can be fixed by updating Claude Code, clearing cache, and starting a new session.