WDK x Spark — A New Way to Build Bitcoin Wallets
Most wallets today force a tradeoff between user experience and self-custody. Developers are faced with the choice between simplicity and control. The result is slow onboarding, fragmented flows, and users who never reach the finish line.
That needs to change.
Tether’s Wallet Development Kit and Spark are coming together to fix it. Starting today, Spark is integrated directly into WDK. Builders can now create production-ready wallets with native support for Lightning, Bitcoin, stablecoins, and more through a single, stateless API.
Paolo Ardoino, CEO of Tether, said, “The future is unpredictable chaos, instability, or prosperity. But with WDK and Spark, we can build programmable, resilient monetary systems that serve people, machines, and communities alike. This integration makes Bitcoin Lightning truly accessible, enabling instant global transactions without compromising custody or privacy.”
WDK is purpose-built for developers. It provides teams with full control over the wallet layer, eliminating the need to manage infrastructure or handle sensitive data. There are no custodial risks. No secrets stored. Just clean, extensible wallet tooling that works across chains.
Now with Spark, developers can:
- Launch Bitcoin Lightning native wallets with full ownership of keys and flows
- Power instant Bitcoin and stablecoin payments with low fees and global reach
- Build apps where the wallet experience disappears into the background.
“Tether has built something truly aligned with Bitcoin’s ethos. By bringing Spark to WDK, we are giving developers an easy path to embed Lightning directly into the apps people already use.” David Marcus, CEO & Co-founder, Lightspark.
This is what the future of Bitcoin looks like.
About Tether and USDT
Tether is a pioneer in stablecoin technology. It aims to revolutionize the global financial landscape and provide accessible, secure, and efficient financial, communication, and energy infrastructure. Tether enables greater financial inclusion and communication resilience, fosters economic growth, and empowers individuals and businesses.
As the creator of the industry's largest, most transparent, and liquid stablecoin, Tether is committed to developing a sustainable and resilient infrastructure that benefits underserved communities. By leveraging cutting-edge blockchain and peer-to-peer technology, it is committed to bridging the gap between traditional financial systems and the potential of decentralized finance.
About Spark
Spark is the fastest, cheapest, most UX-friendly way to build financial apps and launch stablecoins on Bitcoin. It supports native BTC and stablecoin transfers with instant settlement, near-zero fees, and full Lightning compatibility. Follow on X @spark