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Add Web3 login to your app

Niomon Auth supports using Sign-in with Ethereum protocol to authenticate users with Ethereum accounts and ENS profiles. This document is a step-by-step guide to integrating Niomon Auth with a Single-Page App.

OpenID Connect (OIDC)

OpenID Connect or OIDC is an identity protocol that is now widely adopted by many identity providers on the Internet. Niomon's OIDC integrates allow you to set up wallet-based sign-in with existing applications that support OIDC (or via third-party libraries) with no code written. This is the fastest and simplest way to integrate with Niomon Auth which is perfect for testing and prototyping.

Learn more: OpenID Connect

Step 1: Create a Niomon Developer Account


Niomon is currently in closed beta. If you don't have access, you can request it using the beta sign-up form.

  1. Sign in with your email address at
  2. Register a new tenant.

Step 2: Configure an application

  1. From the Auth tab in Niomon Admin Console, create a new Client.
  2. Configure Callback URLs. If you are following along with our sample project, set this to http://localhost:3000.

Step 3: Install Niomon JS SDK

Using NPM

npm install --save @niomon/niomon-js

Using Yarn

yarn add @niomon/niomon-js

Step 4: Add login flow to your application

import { NiomonClient } from 'niomon-js';

const niomon = new NiomonClient({
clientId: "YOUR_CLIENT_ID",
baseURL: "",
redirectURI: window.location.origin

Step 5: Handle callback from Niomon

Niomon redirects back to your application after the authentication process. Your application should call the handleAuthCallback() function to handle the callback. One way to do this is to only call handleAuthCallback() when state and code query parameters are detected.

if ("state=") &&
("code=") ||"error="))) {
await niomon.handleAuthCallback();

Step 6: Getting user information

After logging in, you may want to display the logged-in user's name or profile picture. Niomon SDK provides the getUser() function to retrieve user information.

const user = await niomon.getUser():

Next Steps

🔥 Well done! Your application can now sign in users using email addresses or Ethereum wallets, and retrieves user profile information.

To learn more, check out: