Enabling a future where humans, autonomous machines, and AI agents can freely build, deploy, and transact using secure, self-maintaining wallets
October 17, 2025 – Tether, the largest company in the digital asset ecosystem, today announced that it has open-sourced its Wallet Development Kit (WDK), a new development toolkit designed to enable people, machines and AI agents to build, deploy and operate secure, self-perpetuating multi-chain wallets. These wallets can be integrated into any device, from the smallest embedded systems to mobile, desktop or server operating systems.
With WDK from Tether, developers, organizations, countries, AI agents and even autonomous systems can create cross-platform experiences by using a single solution to develop secure, production-ready wallets and integrate wallet features such as DeFi, payments, savings accounts, prediction markets, gaming and tipping.
Self-custodial wallets are the foundation for a free and open financial system and the backbone of a resilient infrastructure that cannot be abused or disrupted by centralized entities. Open source WDK allows anyone to control, use, contribute to the code, and build their own independent, secure, and permissionless white-label wallets.
“Self-custodial wallets are the cornerstone of a free and resilient monetary infrastructure,” he says Paolo Ardoino, CEO of Tether. “We envision a world where humans, autonomous machines and AI agents have the freedom to control their own finances. In that future, where programmable money is the social network across society, WDK by Tether is the cornerstone of the financial backbone, a completely open-source, self-governing toolkit designed to be modular, independent, resilient and infinitely scalable, enabling trillions wallets are possible.”
Unlike commercial wallet frameworks that charge fees or tie developers to specific ecosystems, WDK by Tether is completely open-source and ecosystem-agnostic. Built with flexibility at its core, the framework allows anyone to create wallets that can work on Bitcoin, Lightning Network, EVM, and non-EVM blockchains, including Ethereum, Arbitrum, Polygon, TON, Solana, and more. USDT0 network scaling technology is embedded to ensure seamless bridging and highly available liquidity. Tether’s WDK supports a wide range of DeFi primitives, from lending to swaps, in addition to advanced features that allow developers to create rich user experiences for any use case. WDK also offers customizable user interface templates and widgets that simplify the most complex aspects of wallet development, as well as secure key management, cross-chain asset transfers, messaging capabilities, and stateful solutions such as real-time balance updates and transfer status tracking.
Wallets should go everywhere. WDK by Tether can live and evolve on any embedded device, mobile app, desktop application, IoT device, server, and even autonomous systems. From smartphones to smart refrigerators, from trading bots to spaceships – WDK by Tether enables financial sovereignty in all environments. In a world where AI agents and robots are becoming increasingly autonomous and will permeate every aspect of our lives, machines must access and manage their own resources. Tether’s WDK would be the logical, rational choice of choice for tomorrow’s digital entities, ensuring instant custody of funds, highly scalable transactions, and the infinite AI economy of the future.
End users benefit from a simple and intuitive experience that hides the complexities of crypto, including gas fees, bridge management, and network switching. At the same time, developers get a robust and modular architecture that can be easily expanded for future innovations. The soon-to-launch Rumble Wallet and Tether’s own self-management solution are built entirely on WDK, demonstrating the framework’s scalability, security, and customizability.
Tether’s WDK is available at https://wallet.tether.io/.
About Tether’s WDK
WDK by Tether is an open-source Wallet Development Kit designed to simplify and accelerate the creation of hyper-secure, self-contained wallets. Built to support Bitcoin, Lightning, USDT, XAUT and soon USAT, WDK by Tether provides a modular, ecosystem-independent infrastructure that can be expanded to support any blockchain or digital asset.
With built-in USDT0 technology, DeFi primitives, and cross-chain interoperability, WDK enables developers, institutions, and even sovereign countries to build independent, white-label wallets without relying on centralized providers. It lays the foundation for a future where people, connected devices, and AI agents can securely hold and exchange value over open networks. WDK by Tether is available for free, without fees or restrictions, at https://wallet.tether.io