> ## 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If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback: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-june-27-2023",
  "feedback": "Description of the issue"
}
```

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

</AgentInstructions>

# Chainstack updates: June 27, 2023

> Optimism Mainnet archive nodes are now available on Chainstack, unlocking access to historical Optimism state for indexers, analytics, and forensic tools.

**Protocols**. Archive nodes are now available for Optimism Mainnet.