# Sanity MCP server v2.29.1: Standard protocol negotiation errors

- Product: Sanity (https://whatsnew.fyi/product/sanity)
- Vendor: Sanity
- Date: 2026-08-12
- Original notes: https://www.sanity.io/docs/changelog/31168928-d07d-4bb5-ace1-40aff7a4fee3
- Permalink: https://whatsnew.fyi/product/sanity/releases/2026-08-12-mcp-server-v2.29.1-standard-protocol-negotiation

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Fixes Protocol negotiation: Returns the standard error response when an MCP client requests an unsupported protocol version.

- **fixed** — Return the standard error response when an MCP client requests an unsupported protocol version