Plugging the MCP Limitations of Gemini Spark
Ever wanted Gemini Spark to talk to something Google doesn’t own?
I use Claude at work every day, and for good reason. It’s great at what it does, and Anthropic’s ecosystem makes wiring up third-party tools as simple as clicking a button. But for my personal setup, I’m a complete Google fanboy. I use Gemini Spark constantly because I love that it can run unattended in the background and has deep, native ties into the rest of my Google life (Gmail, Calendar, Drive, and Docs).
The trouble starts the moment you step outside that walled garden. I spent a Saturday trying to point Spark at my own MCP server and got “Account linking required” about two hundred times in a row. No useful error, no logs worth reading, just a login loop that would not close. I came pretty close to handing a middleman $20 a month to make it somebody else’s problem.
I didn’t, and it turns out the whole thing runs for free. Here’s what it took.
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