* [MCP Registry v1.7.9](https://github.com/modelcontextprotocol/registry) – Registry service providing clients with a list of MCP servers.

* [HOL Standards SDK v0.1.184](https://github.com/hashgraph-online/standards-sdk) – Lightweight SDK providing reference implementations and tools for Hashgraph Consensus Standards (HCS), including a registry broker client, demos, and CLI.