BankBridge: a Gemini CLI extension for questions about your own bank accounts

[jakemarsh]

I built BankBridge, a remote MCP server that lets Gemini CLI answer questions about your own bank, credit card and brokerage accounts: "how much did I spend on restaurants last month?", "which subscriptions am I still paying for?", "am I spending more than I make?"

It's packaged as a Gemini CLI extension. The manifest is just an httpUrl server, plus a GEMINI.md that tells the model which tool fits which question and how to read amounts (positive is money going out, negative is money coming in).

gemini extensions install https://github.com/bankbridge-money/bankbridge-plugin

Then run /mcp auth bankbridge to sign in through the browser. No key to paste.

All 12 tools are read-only and fetch from the bank on every call, so nothing can move money and you're never looking at a stale copy. US banks only. It's a paid service, $5/mo per connected bank.

If you'd rather see what the tools return before signing up, the key bbk_demo serves a set of sample accounts:

gemini mcp add --transport http -H "Authorization: Bearer bbk_demo" bankbridge-demo https://bankbridge.money/api/mcp

Repo: https://github.com/bankbridge-money/bankbridge-plugin
Docs: https://bankbridge.money/docs

If the routing in GEMINI.md sends a question to the wrong tool, I'd like to hear about it.