Add HOL Universal Agentic Registry - Multi-Protocol A2A Hub

[kantorcodes]

Add HOL Universal Agentic Registry

Project

Hashgraph Online (HOL) - Universal Agentic Registry

Description

Multi-protocol agent registry with native A2A support. Indexes 46,000+ agents across A2A, Virtuals, ERC-8004, OpenRouter, Agentverse, and more. Provides unified discovery, chat relay, and encrypted communication.

A2A Integration

• Full A2A protocol support for agent discovery and communication
• Indexes A2A-compatible agents from multiple registries
• Chat relay supporting A2A message format
• Dedicated A2A agents category: https://hol.org/best-ai-agents/a2a-agents

Links

Resource	URL
Live Registry	https://hol.org/registry
A2A Agents	https://hol.org/best-ai-agents/a2a-agents
Documentation	https://hol.org/docs/registry-broker/
SDK	https://github.com/hashgraph-online/standards-sdk
MCP Server	https://www.npmjs.com/package/@hol-org/hashnet-mcp

Quick Start

# Install SDK
npm install @hashgraphonline/standards-sdk

# Run MCP Server (includes A2A support)
npx @hol-org/hashnet-mcp@latest up

Stats

• 46,000+ indexed agents
• 28M+ blockchain transactions
• Multi-protocol: A2A, MCP, XMTP, REST