WAMP XBR Decentralized Messaging Extension

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XBR enables secure decentralized application messaging, peer-to-peer data-trading and -service microtransactions in open data markets between multiple independent entities or operators.

XBR sits on top of WAMP, an open messaging middleware and service mesh technology, enabling secure integration, trusted sharing and monetization of data and data-driven microservices between different parties.

The protocol is implemented in smart contracts written in Solidity for the Ethereum blockchain, and is MIT licensed.

Contents

• Introduction
  • XBR Smart Contracts
  • Participants
  • Other Components
• Installation
  • Requirements
  • Installing from PyPI
  • Installing from Source
  • Verifying Installation
  • Dependencies
• Getting Started
  • Prerequisites
  • Understanding XBR
  • Basic Concepts
  • FAQ
  • Next Steps
• Programming Guide
  • Application Development
  • Project Development
  • Contracts Reference
  • XBR Programming
  • XBR Authentication
  • XBR Command line interface
• Release Notes
  • 25.12.2
  • 25.12.1
  • 21.2.1
  • 21.1.1
  • 20.5.1
  • 20.4.2
  • 20.4.1
  • 20.3.1
  • 20.2.2
  • 20.2.1
  • Release Workflow (for Maintainers)
• Changelog
  • Unreleased
  • 25.12.2 (2025-12-17)
  • 25.12.1 (2025-12-16)
• Contributing
  • Contributing
• WAMP Projects Overview
  • The Group of Projects and WAMP
  • Important Files
• AI Policy
  • AI Contributors Policy
  • AI Assistants Policy
  • Disclosure of Use of AI Assistance
  • AI-Assisted Work Audit Log
  • AI Disclosure Process
  • AI Audit Process Review
• API Reference
  • xbr

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Copyright (c) typedef int GmbH. Licensed under the MIT License. WAMP, Autobahn, Crossbar.io and XBR are trademarks of typedef int GmbH (Germany).