The pattern in the walkthrough was written from memory and differs from the one on the `shared-memory-mcp` provider in a way that matters: `…:[0-9]+/.*` requires a path component, so it fails to match a bare `http://localhost:5693`, which the deployed `…:\d+(/.*)?$` accepts. Copy the live value verbatim instead. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>