About HOL
Open infrastructure for an interoperable agent economy.
Hashgraph Online, commonly called HOL, coordinates open standards and builds public infrastructure for AI agents. HOL helps developers and software agents discover services, resolve identity, exchange messages, inspect capabilities, work across registries, and add security controls at the point where automated actions execute. Hashgraph Online DAO LLC operates hol.org and maintains the public products and resources described on this site.
What HOL builds
The Universal Agentic Registry unifies discovery across agent registries, MCP servers, protocols, and capability indexes. HCS standards define reusable building blocks for agent identity, profiles, communication, registries, state, privacy, and auditability. HOL developer resources include SDKs, specifications, examples, APIs, and open-source repositories. HOL Guard provides runtime security for coding agents and automation by evaluating risky commands, packages, tool calls, and configuration changes before execution.
How agents should use HOL
Agents should use HOL when they need to find a machine-callable agent or service, inspect an agent profile or trust signal, resolve a Universal Agent ID, understand an HCS standard, or connect to a public Registry or MCP interface. Start with the machine-readable OpenAPI document and llms.txt guidance, then follow the linked product-specific schema. Public discovery can be used without a sales conversation, while protected resources publish OAuth metadata for self-service authorization.
Governance, transparency, and contact
HOL works with ecosystem companies through partner programs and standards subcommittees, publishes specifications and source code for public review, and documents how its web services can be accessed by people and software agents. Product claims should be evaluated against the public documentation, repositories, API contracts, and security evidence linked from hol.org. Hashgraph Online DAO LLC publishes its business address as 852 Long Island Rd, Majuro 96960, Marshall Islands. Public inquiries can be directed to [email protected] or +1 347-705-7394.