> ## 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.

# Chainstack updates: July 21, 2026

> Starknet nodes are upgrading to Pathfinder v0.23.0 — a breaking change that removes JSON-RPC API versions 0.6, 0.7, and 0.8 and moves the default endpoint to version 0.9.

**Starknet**. Chainstack is upgrading Starknet nodes to [Pathfinder v0.23.0](https://github.com/eqlabs/pathfinder/releases/tag/v0.23.0). This is a breaking change to JSON-RPC API version support: versions 0.6, 0.7, and 0.8 are removed, and the default `/` endpoint now serves version 0.9. Pin `/rpc/v0_9` or `/rpc/v0_10` in your endpoint URL before the upgrade reaches your node. See [Pathfinder RPC version removal 0.23.0](/reference/starknet-pathfinder-0-23-0-rpc-version-removal) for the migration guide.