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How to authenticate a React app against a serverless backend API with Auth0

· 8 min read
Co-Founder and Maker @ Codehooks

Most web applications and mobile apps need a way for users to authenticate themselves so that the backend APIs and database can access data in the context of the user. One of the leading service providers within authentication services is Okta Auth0. They provide a very powerful platform and a ton of features for creating optimal user login experiences.

In this blogpost, we'll show how you can easily authenticate serverless API routes using only a few lines of code together with the public signing key/JWKS endpoint method of validating JWT tokens. Don't know what that is? Don't worry. Read on 👉. We have used a React single-page example from Auth0 here, but it should work just fine with their other examples as well (Angular, JavaScript, Vue).