Introducing UMA Playground

We’re making it easier than ever for developers to explore Universal Money Address (UMA) with powerful new tools in the UMA Playground. No API keys, no signup—just instant, hands-on access to UMA’s capabilities.

UMA Playground – Interactive Demos, Open-Source Code

Quickly grasp UMA transaction flows and see how UMA can power seamless payments in your apps. Dive into interactive demos, inspect open-source code on GitHub, and explore UMA Auth—an extension powered by Nostr Wallet Connect (NWC) that lets users delegate payment permissions to third-party apps.

Try it now – Spin up a test UMA, preloaded with fake funds.

UMA Test Wallet – Build & Test UMA Wallets

Developers can create test UMA wallets, transact between them, and integrate UMA Auth for real-time, FX-based payments on the regtest network. The Test Wallet is ideal for:

• Simulating wallet experiences
• Sending/receiving UMA payments with real-time FX quotes
• Authorizing third-party apps with UMA Auth
• Testing UMA Auth client apps
• Managing multiple UMA addresses under one account
• Open-source GitHub repo available

Try it now - Customize wallet colors, switch between wallets, and see transactions in action.

Pennywall – Unlock Content with Microtransactions

Pennywall is an open-source demo showcasing instant, low-cost payments via UMA Auth. Users pay per scroll to unlock content in real-time.

• Open-source GitHub repo available
• Seamless micropayments are triggered as users scroll
• Budget control via UMA Auth

Try it now - Clone & build your own microtransaction-powered app.

Make Cents – Incentivize User Engagement with Instant Payments

Make Cents demonstrates how UMA Auth can drive user actions with microrewards. Users get real-time payments for:

• Watching a pre-roll ad (paid per second watched)
• Completing a survey at the end
• Open-source GitHub repo available

Payments pause when the user stops watching and resume when they continue. Perfect for engagement-based monetization models.

Get Started

Start building with UMA – docs.uma.me
Join the developer community – Discord
Need help? Reach out at hello@uma.me

The future of programmable money is here—start building today! 🚀

UMA is powered by Lightspark—the fastest, most open global payments network on Bitcoin. Learn more about Lightspark and how we’re building the infrastructure for seamless, borderless payments: https://www.lightspark.com/