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Kolaybase + React Native: Backend for Mobile Apps

React Native apps need a backend they can call directly. kolaybase-js works in React Native to query PostgreSQL, authenticate users, and upload files.

Install

npm install kolaybase-js

Create the client

// kolaybase.ts
import { createClient } from "kolaybase-js";

export const kb = createClient({
  projectId: process.env.EXPO_PUBLIC_KOLAYBASE_PROJECT_ID!,
  apiKey: process.env.EXPO_PUBLIC_KOLAYBASE_ANON_KEY!,
});

With Expo, use EXPO_PUBLIC_ env variables for the anon key. Secure user data with row-level security so the mobile client only sees permitted rows.

Sign in and load data

import { kb } from "./kolaybase";

await kb.auth.signIn({ email, password });

const { data } = await kb
  .from("messages")
  .select("id, body, sent_at")
  .order("sent_at", { ascending: true });

Direct, serverless calls

Your app talks to the backend over plain HTTP/JSON — no server to maintain per screen.

Auth built in

Email, OAuth, and magic-link sign-in via kb.auth, with sessions handled for you.

Files with signed URLs

Upload media to S3-compatible storage and serve it with access-controlled URLs.

Frequently asked questions

Does kolaybase-js work in React Native and Expo?
Yes. It's a standard JavaScript SDK using fetch, so it runs in React Native and Expo. Use public env variables for the anon key.
How is mobile data kept secure?
Authentication plus PostgreSQL row-level security means even direct API calls only return rows the signed-in user is allowed to access.

Other integrations

Next.jsReactVueSvelteKitNode.jsAstroRemixNuxtAngularSolidJSExpress

Build your React Native backend on Kolaybase

PostgreSQL, auth, storage, and a REST API — running in minutes.

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