# The diagram_update_mermaid tool stops working

Calls to MCP tool diagram_update_mermaid on Miro MCP Server stopped working on September 14, 2026.

The MCP tool diagram_update_mermaid was removed on September 14, 2026. Any calls directed to diagram_update_mermaid fail since that date.

## What to use instead

Call canvas_update_from_svg instead.

- API: Miro MCP Server (mcp.miro.com)
- Kind: Tool removal
- Takes effect: September 14, 2026
- Calls after that day: fail
- Calls it hits: `MCP tool diagram_update_mermaid`
- Source: [Announcement](https://developers.miro.com/changelog/20-legacy-mcp-board-tools-to-be-deprecated-migrate-by-sept-14)
- Verified: November 6, 2026, against Miro MCP Server's own pages
- Page: https://www.okapi.bot/providers/miro-mcp-server/breaking-changes/the-diagram-update-mermaid-tool-stops-working/

## Miro MCP Server's words

> These tools were removed on September 14, 2026

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent