v3 API — Web2 + Web3 auth

Auth with wallets,

OAuth 2.0 authentication that gives every user a blockchain wallet. One SDK, one integration — both Web2 identity and Web3 capabilities.

$ npm install @kid/oauth2

OAuth 2.0 + PKCEAuto walletsGas sponsorshipTypeScript SDK

Quick start

Authenticate users and access wallets in a few lines of code.

app.ts

typescript

import { KIDAuth } from '@kid/oauth2';

const auth = new KIDAuth({
  clientId: 'YOUR_CLIENT_ID',
  redirectUri: 'https://yourapp.com/callback'
});

// Generate login URL with PKCE
const loginUrl = auth.createLoginUrl({
  scope: 'profile.basic wallet.read'
});

// Exchange code for tokens
const tokens = await auth.exchangeCode(code);

// Get user info with wallet
const user = await auth.getUserInfo(tokens.access_token);
console.log(user.wallet_address);

Everything you need

Web2 authentication with Web3 superpowers, out of the box.

OAuth 2.0 + PKCE

auth

Industry-standard authorization with PKCE. Google, Apple, Telegram out of the box.

Auto Wallet Generation

web3

Every user gets a blockchain wallet on signup. Zero extra steps for your users.

Gas Sponsorship

web3

Sponsor gas fees for your users. They transact on-chain, you cover the cost.

TypeScript SDK

Full type safety and autocomplete. Integrate authentication in minutes.

Granular Scopes

security

Request only what you need: profile, contact, wallet.read, wallet.transfer.

Multi-Platform

universal

React, Next.js, Vue, Flutter, React Native, or any HTTP client.

Wallet API

Built-in blockchain capabilities

Every authenticated user gets a wallet. Sign messages, send transactions, and sponsor gas — all through standard OAuth scopes.

Wallet Info

Retrieve wallet address and public key

GET/wallet/info

Sign Messages

Request message signatures for verification

POST/wallet/sign-message

Send Transactions

Execute transactions with optional gas sponsorship

POST/wallet/send-transaction

Sponsor Gas

Cover transaction fees for seamless UX

POST/wallet/sponsor

AI-Ready

Let AI write your integration

Copy a prompt, paste it into your AI coding assistant, and get a working integration.

AI prompt

Read https://dash.kid.koompi.org/llms.txt and implement KID OAuth in my Next.js app:
1. Create login button with PKCE flow
2. API route for token exchange (/api/auth/callback)
3. Token refresh endpoint (/api/auth/refresh)
4. Get user profile with wallet address
5. Store tokens in httpOnly cookies
6. Support wallet.read and wallet.transfer scopes

llms.txt

Three steps to production

Create a project

client_id: 'abc123.kid.koompi.org'

Install the SDK

Add @kid/oauth2 to your project and configure the login flow.

npm install @kid/oauth2

Ship it

Users authenticate and automatically receive a blockchain wallet.

user.wallet_address // 0x...

Start building today

Free to start. Add authentication with wallets to your app in minutes.