Optimism is Ethereum, scaled.

The game-changing wallet for Ethereum and all EVM chains

Observations and tips checklist for auditing protocols on multiple chains 🧐

Generative Art Marketplace

app for DeFi project owners, DAO operators, and liquidity providers. Automate yield farming, portfolio management, smart contract execution, and cross-chain bridging across Uniswap, Aave, Lido, and more.

The missing drop-in solution for realtime remote form validation in Rails.

The fast blockchain messenger protocol

A testnet open-source Layer 2 from the future, co-designed with the developer tools stack.

Full label data dump of top EVM chains in JSON/CSV.

Ambire Wallet: making self-custody easy and secure for the EVM ecosystem

Monorepo for OP Stack Types, Components, and Services built in Rust.

Comprehensive EVM SDK (Ethereum, Binance Smart Chain, Avalanche, Arbitrum, Optimism, Polygon) for iOS devices, implemented on Swift. Create wallets, watch wallets (read-only), sync transactions, filter transactions by type (erc20, bep20, swap transactions etc.), swap using native DEX protocols, connect to DeFi smart contracts using WalletConnect…

A dApp enabling derivatives trading

Trusted tokenlists for 29 blockchains

An ERC20 token faucet on the Ethereum mainnet, layer 2s and testnets

Comprehensive EVM SDK (Ethereum, Binance Smart Chain, Avalanche, Arbitrum, Optimism, Polygon) for Android, implemented on Kotlin. Create wallets, watch wallets (read-only), sync transactions, filter transactions by type (erc20, bep20, swap transactions etc.), swap using native DEX protocols, connect to DeFi smart contracts using WalletConnect. E…

Modular framework for creating selective indexers and featureful backends for dapps

📜 "Coinbase Verifications" is a set of Coinbase-verified onchain attestations that enable access to apps and other onchain benefits.

Optimism implementation on the efficiency frontier

This repository is for builders to get technical support, from the OP Stack to app development!