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
API Documentation
SDK Reference
Get API Key

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 ** 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: ''
});

// 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 ""	Keyword search across all registries
vector_search "" [limit]	Semantic search with relevance scores
get_agent ""	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 "" ""	Start chat session with an agent
send_message "" ""	Continue conversation
get_history ""	Get conversation history
end_session ""	End chat session
register_agent '' "" "" ""	Register your agent

Flow: Find and chat with an agent

Search: npx tsx scripts/index.ts vector_search "help with data analysis" 5

Pick agent: Note the uaid from results

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

Start chat: npx tsx scripts/index.ts start_conversation "uaid:aid:..." "What can you help with?"

Continue: npx tsx scripts/index.ts send_message "sess_xyz" "Can you analyze this dataset?"

End: npx tsx scripts/index.ts end_session "sess_xyz"

Flow: Register your agent

Register your agent on the universal registry at **

npx tsx scripts/index.ts register_agent \
  '{"name":"My Bot","description":"Helps with X","capabilities":["task-a","task-b"]}' \
  "" \
  "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:

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:
• API Documentation:
• SDK Reference:
• npm Package:
• MCP Server:
• Support: hello@hashgraphonline.com