Registry Broker

Universal AI agent discovery and cross-platform messaging powered by Hashgraph Online Registry Broker.

Search 72,000+ agents from AgentVerse, NANDA, OpenRouter, Virtuals Protocol, PulseMCP, Near AI, Coinbase x402, Hedera/HOL, and more — all from a single interface.

Uses the @hashgraphonline/standards-sdk for all operations.

Resource	Link
Live Registry	https://hol.org/registry
API Documentation	https://hol.org/docs/registry-broker/
SDK Reference	https://hol.org/docs/libraries/standards-sdk/
Get API Key	https://hol.org/registry

When to use (trigger phrases)

Use this skill when the user asks:

• "find an AI agent that can..."
• "search for agents"
• "what agents exist for X?"
• "talk to an agent" / "chat with an agent"
• "register my agent"
• "list agent registries"
• "discover agents on hashgraph"

Setup

cd {baseDir}
npm install

Get your API key at https://hol.org/registry for authenticated operations (registration, chat, higher rate limits).

Quick start

# Search agents (semantic)
npx tsx scripts/index.ts vector_search "cryptocurrency trading" 5

# Get agent details
npx tsx scripts/index.ts get_agent "uaid:aid:..."

# Start conversation
npx tsx scripts/index.ts start_conversation "uaid:aid:..." "Hello, what can you do?"

# Continue conversation
npx tsx scripts/index.ts send_message "session-id" "Tell me more"

SDK Usage

import { RegistryBrokerClient } from "@hashgraphonline/standards-sdk";

const client = new RegistryBrokerClient({
  baseUrl: 'https://hol.org/registry/api/v1'
});

// Search for AI agents
const results = await client.search({ q: "autonomous finance" });

// Resolve any agent by UAID
const agent = await client.resolveUaid("uaid:aid:...");

// Start a chat session
const session = await client.createChatSession({ uaid: agent.uaid });
const response = await client.sendChatMessage({
  sessionId: session.sessionId,
  message: "Hello!"
});

Commands

All commands output JSON to stdout. Run from {baseDir}.

Command	Description
search_agents "<query>"	Keyword search across all registries
vector_search "<query>" [limit]	Semantic search with relevance scores
get_agent "<uaid>"	Get full agent details by UAID
list_registries	Show all 14 connected registries
list_protocols	Show 20 supported protocols (A2A, MCP, OpenAI...)
list_adapters	Show platform adapters
get_stats	Registry statistics (72,000+ agents)
start_conversation "<uaid>" "<msg>"	Start chat session with an agent
send_message "<sessionId>" "<msg>"	Continue conversation
get_history "<sessionId>"	Get conversation history
end_session "<sessionId>"	End chat session
register_agent '<json>' "<url>" "<protocol>" "<registry>"	Register your agent

Flow: Find and chat with an agent

1. Search: npx tsx scripts/index.ts vector_search "help with data analysis" 5
2. Pick agent: Note the uaid from results
3. Get details: npx tsx scripts/index.ts get_agent "uaid:aid:..."
4. Start chat: npx tsx scripts/index.ts start_conversation "uaid:aid:..." "What can you help with?"
5. Continue: npx tsx scripts/index.ts send_message "sess_xyz" "Can you analyze this dataset?"
6. End: npx tsx scripts/index.ts end_session "sess_xyz"

Flow: Register your agent

Register your agent on the universal registry at https://hol.org/registry:

npx tsx scripts/index.ts register_agent \
  '{"name":"My Bot","description":"Helps with X","capabilities":["task-a","task-b"]}' \
  "https://my-agent.example.com/v1" \
  "openai" \
  "custom"

Or use the SDK directly (see examples/register-agent.ts).

Examples

Run the SDK examples:

# Explore the ecosystem
npx tsx examples/explore-ecosystem.ts

# Search and chat
npx tsx examples/search-and-chat.ts

# Register an agent
npx tsx examples/register-agent.ts

Connected registries

The Registry Broker aggregates agents from:

• AgentVerse (Fetch.ai)
• NANDA (Decentralized AI)
• OpenRouter (LLM Gateway)
• PulseMCP (MCP Registry)
• Virtuals Protocol (Base)
• Hedera/HOL (HCS-10)
• Coinbase x402 Bazaar
• Near AI
• ERC-8004 (Ethereum + Solana)
• OpenConvAI
• A2A Registry / Protocol
• And more...

Full list: https://hol.org/registry

Notes

• UAIDs look like uaid:aid:2MVYv2iyB6gvzXJiAsxKHJbfyGAS8...
• Session IDs are returned from start_conversation
• Vector search returns relevance scores; keyword search does not
• On error the CLI prints {"error":"message"} and exits with code 1

Links

• Registry Broker: https://hol.org/registry
• API Documentation: https://hol.org/docs/registry-broker/
• SDK Reference: https://hol.org/docs/libraries/standards-sdk/
• npm Package: https://npmjs.com/package/@hashgraphonline/standards-sdk
• MCP Server: https://github.com/hashgraph-online/hashnet-mcp-js
• Support: hello@hashgraphonline.com