multi-google-mcp
Every Google MCP server I found assumed you have one account. I have several. This one speaks to all of them from a single agent session: search and send Gmail, manage Calendar events, read and write Drive files, with every tool call naming the account it acts on.
Designed for personal, local use. Tokens stay on your machine, and the install runbook is written so an agent can set the whole thing up for you, Google Cloud configuration included.