SnapSell: AI-Powered Marketplace Automation

Inspiration

• Students avoid selling items due to tedious listing process
• College towns get trashed with abandoned furniture during move-out
• Students miss opportunities for easy money from unused items
• Environmental waste from discarded, reusable items

What it does

• Video-to-listing automation

  • Take a walkthrough video while narrating items to sell
  • AI automatically generates professional listings with descriptions
  • Handles pricing suggestions and item categorization

• Seamless marketplace integration

  • Dashboard to manage all of your listings
  • One-click posting to FB Marketplace
  • AI agents manage buyer communication and negotiations

• Smart scheduling

  • Google Calendar integration for meetups
  • Context-aware of your availability and location
  • AI Agent automatically suggests meeting times based on schedule

How we built it

• Frontend

  • NextJS + ReactJS for core application
  • TailwindCSS for styling
  • TypeScript for type safety

• Backend

  • Flask server for API endpoints
  • Google Gemini API for video processing
  • Claude AI API for agentic reasoning and negotiation/scheduling
  • Selenium for marketplace automation and post uploading
  • Google Calendar API integration

Challenges

• Complex Selenium debugging for reliable marketplace automation
• Synchronizing multiple API requests and browser automations
• Maintaining consistent data flow between different services
• Handling video processing across varying quality inputs

Accomplishments

• Built working end-to-end automation for the entire selling process
• Created frictionless user experience from video to sale
• Successfully integrated multiple AI services and APIs
• Developed system that we would actually use frequently

What we learned

• Hands-on experience with new AI technologies (Gemini, Claude)
• AI agent implementation and structured output handling
• Full-stack development with multiple service integration
• Feature prioritization while maintaining product cohesion

Future Development

• Market analysis for smart price recommendations
• Support for multiple photos and item grouping
• Extended video processing capabilities
• Integration with additional marketplace platforms
• Production deployment and scaling

Built With

• claude
• flask
• gemini
• python
• selenium
• supabase