Build a self-hosted bookkeeping and finance app
Poster used Claude over a weekend to plan and build a self-hosted app that organizes receipts for an accountant and replaces paid bookkeeping software.
What they did
The poster first used ChatGPT for a high-level accounting plan, then had Claude turn it into an implementation plan, and used Codex to find gaps before sending revisions back through Claude’s UltraPlan for a few rounds. They then ran the plan to build a self-hosted Mac app where bank transactions come in through an MCP, Claude tags them to Schedule C categories, uncertain items go to a review queue, and the poster’s fixes become reusable rules.
How it went
They say it handled a couple thousand transactions, was built end to end in two days including a simple Android dashboard app, and cut their software spend from about $524 a year to a $60 yearly bank-feed cost. In comments they stress it is for a small, passive LLC and still gets professional review, with live bank feeds the hardest part.
Worth knowing
The planning loop took about an hour of back-and-forth across GPT, Claude, Codex, and UltraPlan; wiring the MCP to live bank data was the only part they say needed real trial and error.
Labels
it is for a small, passive LLC
it is for a small, passive LLC
Poster used Claude over a weekend to plan and build a self-hosted app
Claude tags them to Schedule C categories
They then ran the plan to build a self-hosted Mac app
Poster used Claude over a weekend to plan and build a self-hosted app that organizes receipts for an accountant and replaces paid bookkeeping software.
The “Material” label failed its quality check and is not used for selection.
Details
- Agents
- Claude
- Source
- Source date
- Jul 1, 2026
- Accounts
- 1
- In registry since
- Oct 14, 2026