> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

<AgentInstructions>

## Submitting Feedback

If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:

POST https://docs.chainstack.com/feedback

```json
{
  "path": "/changelog/chainstack-updates-march-10-2022",
  "feedback": "Description of the issue"
}
```

Only submit feedback when you have something specific and actionable to report.

</AgentInstructions>

# Chainstack updates: March 10, 2022

> Harmony Shard 0 mainnet and devnet support, a Harmony metaverse tutorial, and a self-service plan downgrade option in your Chainstack billing settings.

* **Protocols**. Harmony support. You can now use shared and dedicated Harmony Shard 0 nodes on mainnet and devnet.
* **Documentation**. Harmony general description, operations, simple metaverse tutorial.
* **Subscription downgrading**. You have now the ability to downgrade your plan on the **Settings** > **Billing** page.