Haystack's intranet MCP server reaches ChatGPT, Copilot, and Slack, with write access from Oct 26
Announced Oct 22, the permission-aware server that launched in Claude in August now also answers intranet questions in ChatGPT, Microsoft Copilot Studio, and Slack, with each employee signing in as themselves. From Oct 26, assistants on all four can also draft private knowledge pages and draft or publish group posts, an optional capability admins can block per tool.