What You'll Need

n8n Cloud or self-hosted n8n instance

Hetzner VPS or Contabo VPS for self-hosting

A code editor (VS Code recommended)

OAuth2-enabled service account (Google, GitHub, or Spotify)

Basic understanding of HTTP requests and JSON

Table of Contents

Understanding OAuth2 Flow

Setting Up Your First OAuth2 Application

Implementing OAuth2 in n8n

Common OAuth2 Patterns and Troubleshooting

Getting Started

Understanding OAuth2 Flow

I remember the first time I tried to integrate with an API that required OAuth2. I expected a simple username and password, and instead got hit with authorization codes, token endpoints, and refresh tokens.…