Pennyweight

Connect any MCP client

Pennyweight is a standard remote MCP server — it speaks the open Model Context Protocol, so it works with any MCP-compatible AI client, not only the ones with a dedicated guide. Claude, ChatGPT, Gemini, and Grok each have their own step-by-step page, but if you use a different MCP client — or a new one ships tomorrow — the process is the same three things every time.

The universal setup

  • 1. Find the custom-connector option.In your AI client, look for where it adds an MCP server or “custom connector” — usually under Settings → Connectors / Tools / Integrations. Some clients call it “remote MCP”, “BYO MCP”, or “developer” connectors. A CLI-based client uses its config file instead (commonly an mcpServers entry pointing at the URL).
  • 2. Paste the server URL. The one link, the same for everyone: . Name it “Pennyweight”. Pennyweight is a streamable-HTTP remote MCP server, so the client only needs the URL — there’s nothing to download or run locally.
  • 3. Authorize with OAuth.Choose the OAuth / authenticated option (not “no authentication”). Your client sends you to Pennyweight to sign in, complete two-factor, and enter your passphrase, then returns you to the client. That handshake binds the connection to your account — which is why the URL is safe to share but the access stays yours alone.

What to expect

  • Once connected, your AI can read and query your transactions, sort and split them, build reports, and run tax summaries — all in plain English.
  • It can digest a statement (PDF or CSV) you share in chat and add the rows — see importing without a bank link.
  • It can never move money, and it never sees your passphrase or encryption keys.

Requirements on the client side

Your client must support remote MCP servers over HTTP with OAuth(the modern MCP transport). Most current AI assistants and agent CLIs do; some gate custom connectors behind a paid tier or a developer/beta toggle. If your client only supports local (stdio) MCP servers, it can’t reach a remote server like Pennyweight directly.

Managing access

Disconnect from your client’s connector settings any time, and see manage & revoke access. The grant lasts 30 days of active use. You can also review and copy your MCP link from Settings → Connect your AI in the web app.