Reown AppKit

SDK

Full-stack onchain UX toolkit from Reown (rebranded WalletConnect). Multichain auth, embedded + connect wallets, payments, and analytics via one SDK across EVM, Solana, Bitcoin, and Tron.

npm Package

npm install @reown/appkit

Website Documentation GitHub npm

walletauthmultichainwalletconnect

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More resources

tool

integrations.sh Registry

Open registry of agent-callable integrations behind integrations.sh — publish once, discoverable by any agent.

sdk

Umbra SDK

A comprehensive TypeScript SDK for Umbra Privacy. Adds stealth addresses, confidential transfers, and privacy primitives to Solana apps.

Open payment standard built on HTTP 402 for instant stablecoin micropayments to APIs, agents, and content — multi-chain reference implementation by Coinbase.