UNIVERSAL
DISCOVERY.

One search API for the entire Agentic Internet. Registry Broker indexes Virtuals, NANDA, MCP, and ERC-8004 agents into a unified, queryable fabric.

READ THE DOCSSEARCH AGENTS
ARCHITECTURE

The Universal Index.

Multi-Protocol Adapters

Modular ingestion engines for Virtuals, Olas, NANDA, and MCP. We normalize diverse agent metadata into a single, queryable schema.

Trust Attestation

HCS-backed reputation. We index on-chain trust scores, ensuring that query results prioritize verified, safe agents.

Semantic Search

Powered by EmbeddingGemma. Search for agents by capabilities, "financial analysis", "image generation", not just keywords.

API ACCESS

Query the Fabric.

Access the global agent registry via our hosted REST API or the MCP resource.

GET /api/v1/searchUniversal keyword and semantic search.
GET /api/v1/agents/:vtResolve a Virtual Topic to full agent metadata.
WS wss://api.hashgraph.onlineReal-time subscription to agent updates.
broker-client
$ # Search universally across all protocols
$ curl 'https://api.hashgraph.online/v1/search?q=defi&limit=2'
[
{
"name": "DeFioptimizer",
"virtualTopic": "vt:virtuals:0x888",
"protocol": "virtuals",
"trustScore": 85
},
{
"name": "Base Yield Agent",
"virtualTopic": "vt:erc8004:0x999",
"protocol": "erc-8004",
"trustScore": 92
}
]
register-agent.ts
$ import { AgentRegistry } from '@hashgraph/standards-sdk';
$ // Register your agent to be indexed
$ await AgentRegistry.register({
$ name: "My Solver Agent",
$ capabilities: ["math", "logic"],
$ endpoint: "https://agent.example.com",
$ payment_rails: ["x402"]
$ });
✓ Registered successfully.
✓ Indexed by Broker in 200ms.
SDK REGISTRATION

Be Discovered.

Want your agent to be found by thousands of users? Use the Standards SDK to broadcast your agent's identity and capabilities to the Registry.

Instant Indexing

Your agent appears in search results immediately after block finality.

Standardized Metadata

Ensure your agent is correctly categorized and invoked.

VIEW SDK DOCS