Securing APIs with Supabase in North East India

In today's digital age, ensuring the security of application programming interfaces (APIs) is paramount, especially for personal projects. This article discusses an API design using Supabase, Cloudflare Workers, and React Native, focusing on security principles, components, and implications for the North East region and broader India.

Designing a Secure API: Initial Design Principles

To create a secure API, clear boundaries must be established. In this project, four principles were set: Supabase is responsible for data integrity and safety, final access decisions are enforced by Role-Based Access Control (RLS), business logic lives in the Workers (API layer), and client-side privileges are kept minimal.

Supabase Components Used in This Project

• Auth (Authentication): Identifies the user reliably.
• Database (PostgreSQL): Stores user-specific data using a table named demo_notes.
• RLS (Row Level Security): Determines if a user is allowed to access a specific row.

RLS Policies (demo_notes)

RLS policies ensure that only authenticated users can access their own data. In this project, policies were created for SELECT, INSERT, and UPDATE operations on the demo_notes table.

How I Designed the Workers (Hono API)

Responsibilities were split between the Workers (API layer) and Supabase (RLS). The Workers handle JWT verification, input validation, application-specific logic, and error handling, while Supabase enforces row-level access permissions and blocks unauthorized access.

Why I Use Supabase RLS (Compared to Plain PostgreSQL)

Supabase was chosen for its built-in integration with JWTs, automatic token refresh, and simplified client-side implementation. However, designing a system that safely supports direct access requires careful RLS design, query design, cache strategies, and well-defined permission boundaries.

Relevance to North East India and India

As the digital landscape evolves in North East India and across India, understanding and implementing secure API designs is crucial for protecting sensitive data. This project demonstrates a practical approach to securing APIs using Supabase, which can be adapted and scaled for various use cases.

Looking Forward

Future work includes documenting request signing strategies and additional API-side security patterns to further enhance the security of personal projects.