> This page is for Release Notes.

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://mailchimp.com/developer/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://mailchimp.com/developer/_mcp/server.

# Planned router maintenance

On Tuesday, April 20th at 1:00PM ET we upgraded a router in our Atlanta data center. This should have no user visible impact, but it’s a core piece of our networking infrastructure and its replacement could cause periods of errors or unreachable hosts.

We’re maintaining and upgrading our hardware for increased reliability.