Add Matrix MCP server to README (#2405)

Co-authored-by: adam jones <adamj+git@anthropic.com>
Co-authored-by: Adam Jones <domdomegg+git@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>

Author: 3 people

README.md

@@ -809,6 +809,7 @@ A growing set of community-developed and maintained servers demonstrates various
 - **[Magg: The MCP Aggregator](https://github.com/sitbon/magg)** - A meta-MCP server that acts as a universal hub, allowing LLMs to autonomously discover, install, and orchestrate multiple MCP servers - essentially giving AI assistants the power to extend their own capabilities on-demand. Includes `mbro`, a powerful CLI MCP server browser with scripting capability.
 - **[Mailchimp MCP](https://github.com/AgentX-ai/mailchimp-mcp)** - Allows AI agents to interact with the Mailchimp API (read-only)
 - **[MalwareBazaar_MCP](https://github.com/mytechnotalent/MalwareBazaar_MCP)** (by Kevin Thomas) - An AI-driven MCP server that autonomously interfaces with MalwareBazaar, delivering real-time threat intel and sample metadata for authorized cybersecurity research workflows.
+- **[Matrix](https://github.com/mjknowles/matrix-mcp-server)** - Interact with a Matrix homeserver.
 - **[man-mcp-server](https://github.com/guyru/man-mcp-server)** - MCP to search and access man pages on the local machine.
 - **[MariaDB](https://github.com/abel9851/mcp-server-mariadb)** - MariaDB database integration with configurable access controls in Python.
 - **[Markdown2doc](https://github.com/Klavis-AI/klavis/tree/main/mcp_servers/pandoc)** - Convert between various file formats using Pandoc