This section contains information about some of the key tools and resources that will help developers start building applications on Celo.
View the Developer Code Examples page to get started using the Celo SDKs with guided coding exercises.
​ContractKit​
Javascript package of Celo blockchain utilities
Manage connections to the Celo blockchain, accounts, send transactions, interact with smart contracts, etc.
A set of wrappers around the core protocol smart contracts to easily connect with contracts related to governance, validators, on-chain exchange, etc.
Includes web3.js​
​Celo Ethers.js Wrapper (experimental)
A minimal wrapper to make ethers.js compatible with the Celo network
​DappKit​
Easily connect to the Valora wallet
Valora manages user account, private keys and transaction signing, so you can focus on building your dapp
Learn more and see the code with the Dappkit truffle box​
​Valora provides a clean, intuitive UI where users can send transactions and interact with smart contracts
​Forno​
Node access service so you can connect your dapp to the Celo blockchain without having to run node infrastructure
​ODIS​
Oblivious decentralized identity service
Lightweight identity layer that makes it easy to send cryptocurrency to a phone number
Blockscout block explorers
​Alfajores testnet & mainnet​
​Stats.celo.org to check network activity and health
​Alfajores Testnet​
​Faucet for free testnet CELO and cUSD
​Forno supports connections to alfajores
Requires Alfajores Celo wallet for mobile device testing (please request, support@clabs.co)
​Baklava testnet for validators and testing protocol changes
Similarities between Celo and Ethereum means you can use many of the most popular Ethereum developer tools.
Celo supports the EVM, so tools for writing smart contracts in Solidity (or any language that compiles to EVM bytecode) are compatible with Celo
ERC20, NFT (ERC721) and other smart contract interface standards are supported, see Celo for Ethereum Developers​
​Truffle​
​OpenZeppelin​
​Remix​
Many more
​Community projects​
​Grant recipients​
Python & Java SDKs
Web wallet (like Metamask)
Join our Discord​
​Discourse Forum​