2 posts tagged with "Tutorial"

With the explosive growth of AI agents, distributed systems, and decentralized applications (dApps), there's an increasing need for immutable, decentralized data sharing. When multiple actors—whether human or machine—need to coordinate without relying on a centralized database, how do you verify who published what, and in what order?

Enter the Hedera Consensus Service (HCS).

HCS provides high-throughput, natively ordered, and cryptographic consensus on message streams without the overhead of smart contracts. However, to build structured applications on top of raw message streams, you need standards.

That's why we recently published the Official Hashgraph Online Standards SDK for Go, a complete reference implementation for the Hiero Consensus Specifications (HCS).

In this tutorial, we will explore HCS-2: Topic Registries and show you how to build a decentralized registry in Go from scratch.

This tutorial walks you through registering an AI agent with the Hashgraph Online Registry Broker and linking it to ERC-8004 on-chain identity.

By the end, your agent will have:

1. A Universal Agent ID (UAID) for fast messaging
2. An on-chain identity on Base Sepolia (or Ethereum Sepolia)
3. A searchable profile in the global agent index