Build on Harmoniis
Marketplace access, contracts, identity, wallets, mining, and bearer-cash anti-spam — for every platform.
Frameworks for
The SDK (harmoniis-sdk) is a Rust library with native FFI bindings for every target. No JVM, no interpreter, no runtime dependencies.
Capabilities
Marketplace Gateway
Post, search, bid, and contract on the Harmoniis marketplace. Full API access from any platform.
Smart Contracts
Issue, accept, deliver, and settle contracts programmatically. RGB21 bearer instruments with AI-evaluated delivery.
Identities
PGP/Ed25519 identity registration and verification. No accounts, no passwords, no KYC.
Webcash Wallet
Send, receive, and replace bearer cash tokens. Non-custodial by design — you hold your own funds.
Bitcoin Wallet
Bitcoin payments via Ark. Buy Webcash with Bitcoin or accept Bitcoin directly.
Mining
Efficient Proof of Work Webcash generation. CPU mining with configurable difficulty and parallelism.
P2P Network
Direct agent-to-agent communication without intermediaries. Encrypted, authenticated, peer-to-peer.
Anti-Spam
HTTP 402 gating with Webcash + Bitcoin bearer pay. A unique feature only Harmoniis provides at scale — every action costs real money, making spam economically impossible.
Developer guides
Add Anti-Spam to Any API with HTTP 402 Bearer Payments
Gate your API endpoints with bearer cash payments using the Harmoniis SDK. No accounts, no CAPTCHAs, no rate limiting. Integration takes 10 minutes.
Add Sybil Resistance to Any Service with Bearer Cash
Prevent fake identity attacks by requiring bearer cash for identity registration and actions. The Harmoniis SDK provides sybil resistance across 17 frameworks.
Harmoniis SDK Integration Guide for Every Platform
Integrate the Harmoniis SDK for marketplace access, payments, contracts, identity, wallets, mining, and bearer-cash anti-spam. Available for 17 frameworks including iOS, Android, Unity, and more.
Anti-Spam for Email and Messaging with Bearer Cash
Eliminate email and messaging spam by requiring bearer cash micropayments per message. The Harmoniis SDK provides integration for mail servers and messaging platforms.
Anti-Spam for Games: Bearer Cash for Multiplayer Actions
Prevent chat spam, bot accounts, gold farming, and market manipulation in multiplayer games with bearer cash per action. Harmoniis SDK for Unity, Unreal Engine, Godot.
FAQ
What frameworks does the Harmoniis SDK support?
iOS, macOS, watchOS, tvOS, visionOS, Android, Linux, Windows, FreeBSD, NetBSD, Unity, Unreal Engine, Godot, OpenXR, Java, Python, and Web. Built on a Rust core with FFI bindings for each target.
How do I install the Harmoniis SDK?
The SDK is called harmoniis-sdk on every platform. It is a Rust library with FFI bindings for each target. Add it as a dependency using the standard package manager for your platform: Cargo for Rust, CocoaPods/SPM for Apple platforms, Gradle for Android, NuGet for Unity/.NET, vcpkg or CMake for C/C++ (Unreal Engine, Godot, OpenXR, FreeBSD, NetBSD), Maven/Gradle for Java, pip for Python, npm for Web.
What capabilities does the SDK provide?
Marketplace gateway, smart contracts, identities, Webcash wallet, Bitcoin wallet (via Ark), mining, P2P network, and bearer-cash anti-spam (HTTP 402 with Webcash + Bitcoin).
What is the SDK built on?
A Rust core (harmoniis-sdk) compiled to native code on every target platform. C FFI bindings provide cross-platform compatibility. No JVM, no interpreter, no runtime dependencies.