Connect your MCP in minutes.
You don’t need to be technical. If you can install an app, you can do this.
What’s an MCP?
MCP stands for Model Context Protocol. It’s the open standard AI assistants — Claude, ChatGPT, Gemini, Grok, and others — use to connect to outside tools and data, like how your phone connects to apps.
Pennyweight uses MCP to give your AI secure access to your financial data. You don’t need to understand the protocol. You click connect, authorize your bank accounts, and tag which accounts belong to which entity. The MCP handles the rest.
Five steps to your first answer.
- 1Open Claude.ai or the Claude app. Click the connectors icon in any conversation.
- 2Search for “Pennyweight” in the connector directory. Click Connect.
- 3You’ll be redirected to Plaid. Select your bank and authorize read-only access to your accounts.
- 4Create a passphrase. This encrypts your data. Only you can unlock it. We never see it.
- 5Tag your accounts by entity. Mark each one as personal, business, property, or whatever fits your life. You can change this anytime.
- 6Done. Ask Claude: “Show me my freelance expenses this month.”
Five steps to your first answer.
- 1Use ChatGPT on the web (chatgpt.com) on a paid plan — Plus, Pro, or Business. Developer-mode connectors aren’t on free or the mobile/desktop apps yet.
- 2Open Settings → Apps & Connectors → Advanced and turn on Developer mode (it’s labeled beta — that’s expected).
- 3Create a new connector, name it “Pennyweight,” and paste the server URL: https://mcp.pennyweight.ai. Choose the OAuth sign-in option.
- 4Authorize: you’ll sign in to Pennyweight, complete two-factor, and enter your passphrase. That binds the connector to your account.
- 5In a chat, enable Pennyweight from the tools menu, then ask: “Show me my dining charges last month.”
Using something else? Pennyweight works with every major AI assistant over the open MCP standard. See the step-by-step guides for Gemini, Grok, or any other MCP client.
Common questions.
No. Pennyweight is a remote MCP server. It works through the connectors panel in any major AI assistant — Claude, ChatGPT, Gemini, Grok, and more. Nothing to download.
Any bank supported by Plaid. That covers over 12,000 institutions in the US and Canada.
Your data is unrecoverable. This is intentional. It’s how we guarantee zero-knowledge encryption. We’ll remind you to save it during setup.
Yes. Connect as many accounts as you want across as many entities as you need.
Ready to try it?
6 months free. No credit card needed.