AI Invoice Agent: Automate Billing with AI Emails & PDFs

The AI Invoice Agent streamlines client billing by automating the entire invoice lifecycle. Starting with a manual trigger, it pulls pending invoices from a Google Sheet, filters for 'Pending' status, and formats key details like client info, amounts, dates, and due dates. A loop processes each invoice individually, leveraging GPT-4.1-mini to craft polite, business-oriented email drafts signed by the team.

Next, it extracts the email subject and body, generates a professional PDF invoice using CraftMyPDF with company branding, client details, and payment terms, then sends it via Gmail as an attachment. Finally, it updates the Google Sheet to mark the invoice as 'Completed', logging all relevant data for tracking.

Benefits include massive time savings on repetitive billing tasks, error reduction through automation, professional presentation with AI-enhanced communication, and seamless integration with everyday tools like Google Workspace. Ideal for freelancers, agencies, or small businesses handling 10-100 invoices monthly, reducing manual work from hours to minutes while ensuring timely client follow-ups and audit-ready records.