BillSage

extracts billing info like amount, date, and service from messy text using AI agents—helping users track expenses, manage subscriptions, and avoid hidden charges.

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Inspiration

📖 Project Story: BillSage

🤔 Inspiration

Every time I glanced at a bill — whether it was a restaurant receipt, an online invoice, or a forwarded PDF — I realized something profound: there’s structured value hidden inside unstructured noise.
People waste time manually organizing and extracting data from their bills, whether for tax filing, budgeting, or simple expense splitting. I asked myself:

“What if an AI agent could understand a bill like a human and instantly extract all useful information?”

That spark led to BillSage — an intelligent, agent-powered solution that understands unstructured bill/invoice text and transforms it into structured insights.

🛠️ How I Built It

Leveraging Google's AI Agent Development Kit (ADK), I built a multi-agent pipeline with:

  • An AI agent designed to understand natural language descriptions in billing content.
  • A custom FunctionTool that extracts relevant details like vendor name, date, item breakdowns, and total amount.
  • A Flask backend serving the agent and handling API requests.
  • A beautiful, responsive frontend built using Bolt.new, allowing users to paste their bill text and visualize extracted data.

The result? A seamless, cloud-deployable agent pipeline.

🚧 Challenges Faced

  • Learning the ADK's architecture and working around breaking changes in its evolving API.
  • Integrating the frontend (Bolt.new-generated static site) with the backend (Flask) via CORS-safe APIs.
  • Handling local vs production deployment issues during testing and Vercel deployment.

Each obstacle deepened my understanding of multi-agent AI design patterns and production-grade full-stack systems.

🌟 Uniqueness & Impact

BillSage stands out by focusing on text-based billing, unlike most OCR-heavy systems:

  • Works directly with pasted or forwarded bill text (SMS, email, PDFs with copyable content).
  • Doesn't rely on image processing — lightweight and language-model-agnostic.
  • Can serve as a microservice for:
    • Personal budgeting apps
    • Accounting automation tools
    • Fintech startups
    • Freelancers & remote teams

With the right API keys and billing history, BillSage can turn receipts into revenue.

🚀 What's Next

  • 💸 CSV + GSheets export
  • 🧠 LLM fine-tuning for multilingual receipts
  • 🔔 Budget threshold alerts & smart reminders
  • 💼 Enterprise SaaS dashboard
  • 🔁 Integration with bookkeeping platforms

🧠 Final Thought

BillSage isn't just a tool — it's a stepping stone toward a world where agents handle our daily cognitive load.

What it does

How we built it

Challenges we ran into

Accomplishments that we're proud of

What we learned

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