A Modern Guide to Using OAuth 2.0 with Node.js

Ever followed an OAuth tutorial, copied the code, and then found out the library it uses was deprecated years ago? Yeah, me too. It's frustrating - especially when all you wanted was an access token. A little while ago I wrote A Modern Guide to Using OAuth 2.0 with C# and Visual Studio Code, and it got a lot more attention than I expected. A few people asked if I could do the same thing for Node.js, so here it is. This guide walks you through implementing OAuth 2.0 in Node.js using modern libraries and built-in features. No extra HTTP client, no config library - just a handful of lines of code and a working token at the end of it. Whether you're building a script, a back-end service, or an MCP server that needs to talk to a protected API (more on that in a future post), this is a clean place to start. On this page Prerequisites Step 1: Create a New Node.js Project Step 2: Install Required Packages Step 3: Configure Your OAuth Settings Step 4: Authenticate and Acquire a Token Step 5:…