Learn how to upload invoice PDFs in n8n, extract PDF text, classify invoice totals with AI, route high-value invoices to ClickUp, and archive low-value invoices in Google Drive.
Author: Olaitan Oladipo
Learn how to use the OpenAI Responses API in n8n, store chat history with Data Tables, pass memory back into the model, and compare token usage.
Fix the n8n Google Drive access blocked OAuth error by adding your Gmail as a Google Cloud test user and creating the correct OAuth client credentials.
Learn how to self-host n8n 24/7 on AWS EC2 Free Tier using Ubuntu, Docker, Tabby SSH, and port 5678 inbound rules.
