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    73 repositories

    • chainmail

      Public
      Chainmail: authenticated email using the blockchain.
      researchemailpgpphishing
      Python
      •
      Apache License 2.0
      •7•7•0•11•Updated Jan 6, 2026Jan 6, 2026

    • evm-cctp-contracts

      Public
      Official repository for all EVM-compatible smart contracts used by the Cross-Chain Transfer Protocol
      Solidity
      •
      Apache License 2.0
      •113•185•5•26•Updated Jan 6, 2026Jan 6, 2026

    • buidl-wallet-contracts

      Public
      Official repository for all buidl wallet contracts
      Solidity
      •
      GNU General Public License v3.0
      •32•13•1•12•Updated Jan 5, 2026Jan 5, 2026

    • centre-ecosystem

      Public
      MIT License
      •35•42•1•2•Updated Jan 5, 2026Jan 5, 2026

    • payments-sample-app

      Public
      Vue
      •
      Apache License 2.0
      •25•13•9•4•Updated Jan 1, 2026Jan 1, 2026

    • w3s-react-native-sdk

      Public
      The Circle React Native SDK enables your mobile application to provide user-controlled programmable wallets. By integrating this SDK, your users can securely input sensitive data like PINs or security answers. The SDK encrypts the request body using a secret key, protecting your users' information.
      web3
      Swift
      •
      Apache License 2.0
      •9•7•4•4•Updated Dec 31, 2025Dec 31, 2025

    • modularwallets-web-sdk

      Public
      web3
      TypeScript
      •
      Apache License 2.0
      •19•15•0•2•Updated Dec 31, 2025Dec 31, 2025

    • modularwallets-ios-sdk

      Public
      swiftios
      Swift
      •
      Apache License 2.0
      •5•3•5•2•Updated Dec 31, 2025Dec 31, 2025

    • w3s-react-native-sample-app-wallets

      Public
      Explore React Native mobile sample applications to learn and understand the capabilities of Circle's Web3 Services. This sample application provides a practical way to test the integration of Circle's User-Controlled Wallets SDK into your mobile projects.
      web3
      TypeScript
      •
      Apache License 2.0
      •9•13•0•10•Updated Dec 30, 2025Dec 30, 2025

    • w3s-pw-web-sdk

      Public
      web3
      TypeScript
      •
      Other
      •21•13•7•6•Updated Dec 30, 2025Dec 30, 2025

    • w3s-android-sdk

      Public
      web3
      Apache License 2.0
      •11•19•1•1•Updated Dec 30, 2025Dec 30, 2025

    • w3s-sample-user-controlled-server-node

      Public
      TypeScript
      •
      Apache License 2.0
      •21•9•1•8•Updated Dec 29, 2025Dec 29, 2025

    • w3s-ios-sample-app-wallets

      Public
      Swift
      •
      Apache License 2.0
      •19•20•0•4•Updated Dec 29, 2025Dec 29, 2025

    • w3s-ios-sdk

      Public
      Objective-C
      •
      Apache License 2.0
      •9•11•1•1•Updated Dec 29, 2025Dec 29, 2025

    • terraform-provider-quicknode

      Public
      Terraform Provider for Quicknode
      terraformterraform-providerquicknode
      Go
      •
      Apache License 2.0
      •8•1•0•5•Updated Dec 26, 2025Dec 26, 2025

    • malachite

      Public
      Flexible BFT consensus engine in Rust
      rustconsensusbfttendermintmalachite-engine
      Rust
      •
      Apache License 2.0
      •120•384•68•60•Updated Dec 22, 2025Dec 22, 2025

    • aptos-cctp

      Public
      Official repository for Aptos smart contracts used by the Cross-Chain Transfer Protocol
      Move
      •10•7•2•9•Updated Dec 22, 2025Dec 22, 2025

    • evm-cpn-contracts

      Public
      Official repository for all EVM-compatible smart contracts used by the Circle Payments Network
      blockchainpaymentsevmsmart-contractusdc
      Solidity
      •
      Apache License 2.0
      •1•1•0•3•Updated Dec 17, 2025Dec 17, 2025

    • w3s-sample-user-controlled-client-web

      Public
      TypeScript
      •
      Apache License 2.0
      •26•16•0•8•Updated Dec 13, 2025Dec 13, 2025

    • txt2txn-web

      Public
      Frontend repo for the TXT2TXN Circle Research x Berkeley project on AI and Intents.
      TypeScript
      •
      MIT License
      •4•8•1•8•Updated Dec 13, 2025Dec 13, 2025

    • w3s-programmable-wallets-test-server

      Public
      JavaScript
      •
      Apache License 2.0
      •11•14•0•2•Updated Dec 12, 2025Dec 12, 2025

    • circle-cctp-crosschain-transfer

      Public
      This sample application demonstrates Cross-Chain Transfer Protocol (CCTP) step-by-step capabilities on testnet networks.
      TypeScript
      •
      Apache License 2.0
      •15•11•1•7•Updated Dec 12, 2025Dec 12, 2025

    • dependency-review-action

      Public
      A GitHub Action for detecting vulnerable dependencies and invalid licenses in your PRs
      github-actions
      TypeScript
      •
      MIT License
      •152•2•0•6•Updated Dec 11, 2025Dec 11, 2025

    • starknet-cctp

      Public
      Official repository for Starknet smart contracts used by the Cross-Chain Transfer Protocol
      Cairo
      •
      Apache License 2.0
      •3•0•0•2•Updated Dec 10, 2025Dec 10, 2025

    • circle-bridge-kit-transfer

      Public
      A sample application that demonstrates how to use Bridge Kit to make cross chain USDC transfers with a wallet connect experience.
      TypeScript
      •
      Apache License 2.0
      •5•2•0•0•Updated Dec 10, 2025Dec 10, 2025

    • solana-cctp-contracts

      Public
      Official repository for Solana smart contracts used by the Cross-Chain Transfer Protocol
      Rust
      •
      Apache License 2.0
      •36•47•1•10•Updated Dec 10, 2025Dec 10, 2025

    • circle-nodejs-sdk

      Public
      Node.js SDK for Circle API
      nodejssdk
      TypeScript
      •
      Apache License 2.0
      •32•30•2•4•Updated Dec 10, 2025Dec 10, 2025

    • noble-cctp

      Public
      noblecctp
      Go
      •
      Apache License 2.0
      •34•22•4•10•Updated Dec 10, 2025Dec 10, 2025

    • hyperevm-circle-contracts

      Public
      Repository for all HyperEVM contracts developed by Circle
      Solidity
      •
      Apache License 2.0
      •4•7•0•1•Updated Dec 5, 2025Dec 5, 2025

    • w3s-android-sample-app-wallets

      Public
      Kotlin
      •
      Apache License 2.0
      •34•23•1•3•Updated Dec 5, 2025Dec 5, 2025