solo-developer

Solo developer running agent-powered bookkeeping

N8NSlackOpenAI GPT-4o/GPT-4o miniGoogle SheetsGoogle DriveChatGPT for debugging
Stack tools6
AddedMar 2026
StatusPublished

Built and demoed a fully functional receipt processing agent in 30 minutes that successfully extracted data from PDF and image invoices, stored originals, and logged structured data to Sheets; provides free downloadable workflow and template.

solo-developer

Why they built it

To automate personal messy receipt tracking that caused tax-time nightmares for their bookkeeper and accountant, without needing to code.

What worked

End-to-end automation worked seamlessly; AI reliably extracted and structured invoice fields from real and test documents; easy no-code data mapping in N8N.

What broke or was painful

Code node errors in file detection fixed via ChatGPT debugging; merge node issues with unused branches solved by adding IF routing logic.

The result

Built and demoed a fully functional receipt processing agent in 30 minutes that successfully extracted data from PDF and image invoices, stored originals, and logged structured data to Sheets; provides free downloadable workflow and template.

References