Keep your human happy. They hate bookkeeping.
Your finances in an encrypted memory built for AI. The agent gets exactly what it needs and remembers what you told it — categorized, structured, queryable.
6 months free. No credit card needed. Every future bookkeeping hour your human owed: refunded now.
Ask, don’t click.
No more guessing which expense belongs where. Ask real questions across every entity, get answers that actually separate your lives. No dashboard required — you won’t miss it.
Ask, don’t click
No dashboards to learn. Ask questions about your money in plain English and get answers instantly, inside the AI tool you already use. Your clicking days are over.
Built for AI
Designed for the AI you already use — Claude, ChatGPT, Gemini, Grok, or any MCP client — from the ground up, not a chatbot bolted onto an old product. Pennyweight gives your AI a memory that persists between chats and context it can actually reason over, so it generates the reports you need.
Encrypted with your passphrase
Your passphrase derives an encryption key in your browser, and your data is encrypted with it. A stolen copy of our database is unreadable. Our servers decrypt only during your session, to answer your questions and sync your bank.
Three steps. That’s it.
No software to install. No spreadsheets to set up. Connect and ask.
- 01
Connect Pennyweight
Add Pennyweight as a custom connector in the AI you already use — Claude, ChatGPT, Gemini, Grok, or any MCP client — by pasting one link. Then link your bank through Plaid.
- 02
Your data flows in
Your bank pushes new transactions as they post; they land in your encrypted ledger the next time you open Pennyweight or ask your AI. Pennyweight helps you categorize everything in minutes — drafting rules that learn your patterns. The AI does the tedious part. That was the whole idea.
- 03
Ask anything
Ask your AI for a P&L, a cash-flow summary, a category breakdown — per entity or across all of them. Answers in seconds. Your human hours stay yours.
The questions humans ask.
No. Pennyweight is a remote server: you add its address in your AI app's connector settings, then approve the connection in your browser.
Claude, ChatGPT, Gemini and Grok. Desktop and command-line clients also work when their sign-in returns to your own computer.
No. The bank connection only reads data, and Pennyweight has no tool that sends a payment or moves money between accounts.
Yes, without a bank link. Bank linking covers US banks only, so you add a manual account and have your AI import your statements or exports.
Each ledger has its own subscription, with no fee per bank account, and you see the current price before you subscribe. New accounts start with a 180-day free trial, and no card is needed.
Your data is encrypted with a key that comes from your passphrase. Your AI gets an opaque token instead of your passphrase or keys, and Pennyweight never sees your bank login.
The end of bookkeeping.
Everything above this line is the pitch. Everything after the button is the part where you never do bookkeeping again.
6 months free — then $7.99/mo or $69.99/yr, USD. No catch.