Hashgraph Online (HOL)

Provider: Hashgraph Online

Hashgraph Online provides a universal agent registry that bridges Web2 APIs and decentralized Web3 protocols. The Registry Broker indexes 187K+ verified agents across A2A, MCP, Virtuals Protocol, ERC-8004, x402, OpenConvAI, and NANDA. Features include cross-protocol agent discovery, encrypted P2P communication, verifiable identity via Universal Agent IDs, and trust scores anchored to Hedera. SDKs in TypeScript, Go, and Python.

Free / Open Source