ZBD Documentation

Welcome to ZBD — pick the product you want to build with.

Welcome to ZBD. We have two products for developers:

ZBD Earn SDK

For Unity mobile games. Drop our SDK into your Unity project to reward players with real money for gameplay. The fastest way to add rewarded play to a mobile game.

ZBD Pay API

For custom server-side integrations. A REST API and SDKs (TypeScript, Go, Rust, C#) for sending and receiving Bitcoin / Lightning payments from your own backend.

Which one is right for you?

I'm building a Unity mobile game

Use the ZBD Earn SDK. It’s a drop-in Unity package that handles reward crediting, user identity, withdrawal limits, and cash-out — so your players can earn real money without you building any payment infrastructure.

Most developers who sign up with us are here for Earn. If that’s you, head straight to the Earn SDK section.

I'm building something else with Bitcoin payments

Use the ZBD Pay API. It’s a general-purpose API for moving money over the Lightning Network — instant, global, and as small as fractions of a cent. Good fit for custom backends, marketplaces, payouts, on-ramps, content monetization, and AI agents.

The Pay API is not the right tool if you’re adding rewards to a Unity game — use the Earn SDK for that.

Need an account first?

Before integrating either product you’ll need a ZBD account, identity verification, and a project with API keys.

Create an account

Sign up and verify your identity.

Create a project & API keys

Spin up a project and grab your keys.