Can I use this with frontend libraries like Better Auth?

Yes, it is specifically designed to use the BETTER_AUTH_SECRET environment variable for token consistency between your frontend auth provider and backend.

Does this skill work with any Python framework?

While the patterns are general, the implementation examples are specifically optimized for FastAPI and the jose/passlib libraries.

What hashing algorithm is used for passwords?

The skill recommends and provides implementation patterns for the bcrypt algorithm via the passlib library for secure credential storage.

How does it handle user isolation?

It includes logic to verify that the user_id extracted from the JWT matches the resource ID in the URL path, returning a 403 Forbidden error if they don't match.

Backend JWT Authentication

Name: Backend JWT Authentication
Author: Hamza123545

byHamza123545

0•

API開発

Implements secure JWT-based authentication and user isolation for FastAPI backends using Better Auth shared secrets.

This skill provides comprehensive guidance for building robust authentication systems in Python-based backends. It focuses on JWT (JSON Web Token) implementation using the HS256 algorithm, integrating seamlessly with Better Auth via a shared secret. It covers essential patterns including secure middleware for token verification, user ID validation to prevent cross-account data access, password hashing with bcrypt, and standardized authentication endpoints for signup, signin, and signout operations. Ideal for developers building secure, stateless APIs that require rigorous user-level data protection.

主な機能

010 GitHub stars

02Standardized auth endpoints for user signup and signin with 7-day token expiration

03Automatic user isolation by validating JWT user_id against URL path parameters

04JWT token verification and extraction middleware for FastAPI

05Shared secret integration for frontend-backend consistency

06Secure password hashing and verification using the bcrypt algorithm

ユースケース

01Enforcing user-level data protection to ensure users can only access their own resources

02Implementing cross-platform auth using a shared secret between a frontend and Python backend

03Securing a FastAPI REST API with stateless JWT authentication

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hamza123545/todo_giaic_five_phases backend-jwt-auth

For use in Claude.ai and ChatGPT

Download Skill