Connect Pennyweight to ChatGPT

ChatGPT can connect to Pennyweight as a custom MCP connector today. It works through ChatGPT’s Developer mode, which is a beta feature — the connection is real and functional, but expect the occasional rough edge, and note the requirements below.

Before you start

Plan: Developer mode and custom connectors are not available on the free plan. You need a paid plan — Plus, Pro, or Business.
Web only:you add and use the connector in ChatGPT on the web (chatgpt.com). The mobile and desktop apps don’t expose Developer-mode connectors yet.
Developer mode (beta) must be turned on before you can add a custom MCP server — see the next step.

Turn on Developer mode

In ChatGPT on the web, open Settings → Apps & Connectors.
Open Advanced (advanced settings) and enable Developer mode. It’s labeled beta — that’s expected.

Add the Pennyweight connector

Back in Apps & Connectors, choose to create a new connector / add an MCP server.
Name it Pennyweight and paste the server URL: .
Choose the OAuthauthentication option (not “no authentication”).
Click to connect / authorize. ChatGPT sends you to Pennyweight to sign in, complete two-factor, and enter your passphrase — then back to ChatGPT. That handshake is what binds the connector to your account.
In a chat, enable Pennyweight from the + / tools menu on the message box (under Developer mode / your connectors), then ask your first question.

A note on uploading statements

Since the Pennyweight connector lives in ChatGPT on the web, do your statement uploads there too: ChatGPT web can pass an uploaded file to a connector. If you want the AI to read a bank statement and add the transactions, upload it in the web chat, or simply let ChatGPT read the statement itself and add the rows — see importing without a bank link.

Managing access

You can remove the connector from ChatGPT’s settings at any time. See manage & revoke access. The grant lasts 30 days of active use; Pennyweight never gives ChatGPT your passphrase or keys.