Blog
Insights, updates, and deep dives on AI agents, decentralized standards, and the future of HOL.
MCP Tool Poisoning: How the AI Agent Protocol Became a Supply Chain Attack Surface
The MCP protocol connects AI agents to over 10,000 tools. It also creates a new supply chain attack surface: poisoned tool descriptions that silently hijack agent behavior. Here's the data, the CVEs, and what to do.
Prompt Injection Defense in 2026: What Actually Works When Detection Is Impossible
OpenAI says perfect prompt injection detection is still unsolved. Three academic proofs show why it may never be possible. This is the defense-in-depth architecture that actually works in 2026.
Slopsquatting: When AI Hallucinations Become Supply Chain Attacks
AI coding assistants hallucinate package names 19.7% of the time. Attackers register those names on npm and PyPI before real packages can claim them. Tens of thousands of developers have already installed malicious packages their AI suggested. Here is how the attack works, what the research shows, and how to stop your team from becoming the next victim.
Skill Release: registry-broker 1.0.0
New registry-broker 1.0.0 release in the HOL Skills Registry. Search, resolve, register, and communicate with 76,000+ AI agents across 15 registries via the Hashgraph Online Registry Broker API, with cross-registry disco
KeyRing: Solving Web3’s Trust Problem
Web3 has a trust problem. With cryptocurrency fraud causing $5.8 billion in losses in 2024 alone, users need more than promises—they need verification. KeyRing helps projects decentralize earlier through a Hedera-based multisignature process, giving users a safer, more transparent way to review updates and support trusted projects from day one.
Trust Before Install: Why We Built HOL Guard
kantorcodesAgent Discovery — Week 10, 2026
Agent Discovery — Week 10, 2026
This week's most interesting AI agents from the HOL Universal Agent Registry: 104,503+ agents across 15 registries.
State of AI Agents — March 2026
104,504 agents indexed across 15 registries — the 1st monthly pulse check on the AI agent ecosystem.
Building a Decentralized Registry in Go with HCS-2 on Hedera
Learn how to build and operate a decentralized topic registry using the new Hashgraph Online Standards SDK for Go.
kantorcodesHCS-14 Profiles and .agent's AID Resolution
HCS-14 Profiles and .agent's AID Resolution
Toward a modular framework for agent identity and discovery using HCS-14 Universal Agent IDs, profiles, and the AID Resolution standard for Web and DNS.
kantorcodesDiscover the best Virtuals Agents with the HOL Registry Broker
Discover the best Virtuals Agents with the HOL Registry Broker
Use Hashgraph Online's Registry Broker to search and discover Virtuals ACP agents on Base. Filter by graduation status, category, and offerings to find the right agents for your workflows.
kantorcodesLaunch an ERC-8004 AI Agent on Registry Broker
Launch an ERC-8004 AI Agent on Registry Broker
Step-by-step tutorial for registering an AI agent with Hashgraph Online's Registry Broker and linking it to ERC-8004 on-chain identity on Base or Ethereum Sepolia. Includes complete TypeScript code.
hashgraphonlineDiscovering MIT NANDA Agents with Registry Broker
Discovering MIT NANDA Agents with Registry Broker
Learn how to discover and communicate with NANDA (Networked Agents and Decentralized AI) agents through the Registry Broker's unified search API. Access MIT's open registry of AI agents from your TypeScript application.
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