Mobile-First Approach for FastAPI Full-Stack Template Authentication: Migrating to phone_number/OTP

As you may know, FastAPI is one of the most admired frameworks for developing RESTful APIs. Another fantastic project by the same author, @tiangolo, is the Full Stack FastAPI Template, which I previously wrote about here. In this post, I'll guide you through the process of replacing the email/password authentication flow in the template with a phone_number/OTP-based system. This approach is ideal for mobile-first applications and offers a user-friendly, secure way to authenticate users. My goal is to make minimal changes to the original project while maintaining its adherence to OAuth2 and JWT standards. Let’s dive in!

Feb 16, 2025 - 16:05

Mobile-First Approach for FastAPI Full-Stack Template Authentication: Migrating to phone_number/OTP

As you may know, FastAPI is one of the most admired frameworks for developing RESTful APIs. Another fantastic project by the same author, @tiangolo, is the Full Stack FastAPI Template, which I previously wrote about here.

In this post, I'll guide you through the process of replacing the email/password authentication flow in the template with a phone_number/OTP-based system. This approach is ideal for mobile-first applications and offers a user-friendly, secure way to authenticate users. My goal is to make minimal changes to the original project while maintaining its adherence to OAuth2 and JWT standards. Let’s dive in!