This guide walks you through the process of integrating Salesforce with a web application using a Connected App and the OAuth 2.0 JWT Bearer Flow. It covers steps like setting up the appropriate Salesforce user permissions, creating a self-signed certificate, configuring the Connected App in Salesforce, and implementing authentication and data exchange routes in a Next.js environment. The goal is to securely fetch and post data to Salesforce from your app without requiring user login each time.

Update Salesforce API Only System Profile

Create an Integration User

Create a Private Key and Self-Signed Digital Certificate

Setting up a Connected App in Salesforce for OAuth 2.0 JWT Bearer Flow

Creating a Next.js Route for Salesforce OAuth JWT Bearer Flow

Creating an API route to get data from Salesforce