prompt pal

Monetize your best AI prompts. Buyers preview with live AI chat (3 free tries), purchase for unlimited use, and creators earn instantly. Built with React, Supabase, and Gemini API.

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Project Story: PromptPal

Inspiration

The rise of generative AI has transformed how we write, code, and communicate. Yet despite the proliferation of tools, prompt engineering remains an undervalued skill—often shared informally and without compensation. We were inspired to build PromptPal to address this gap: a platform that empowers creators to publish, preview, and monetize their best prompts, while enabling users to discover high-quality, AI-powered tools tailored to their needs.

PromptPal is designed to democratize access to prompt engineering, foster a creator economy around AI, and streamline the experience of using prompts as products.

Recent data highlights the importance of prompt engineering:

  • According to Dextralabs, the prompt engineering market is projected to grow from \$280M in 2024 to over \$2.5B by 2032, reflecting its rising strategic value.
  • A well-crafted prompt can improve LLM output quality by up to 80%, according to internal benchmarks from leading AI labs.
  • Despite 72% of companies integrating AI into at least one business function, 74% still struggle to scale AI value—often due to poor prompt design.
  • Prompt engineering is now recognized as a core discipline in AI development, essential for optimizing performance, reducing bias, and improving reliability.

How We Built It

PromptPal is a full-stack web application built in under 5 hours during DivHacks. It includes:

  • Frontend: React, TypeScript, Tailwind CSS
  • Backend: Supabase (PostgreSQL, Auth, Row Level Security)
  • AI Integration:
    • Echo SDK (Claude 3.5 Sonnet) for streaming responses
    • Gemini API for creative generation and sponsor track alignment
  • Deployment: Vercel

Key features include:

  • Real-time chat preview with 3-message gating
  • Secure purchase flow and wallet logic
  • Creator analytics and leaderboard tracking
  • Modular prompt architecture for future bundling and subscriptions

Challenges We Faced

  • Designing a preview system that balances user experience with monetization
  • Implementing real-time AI chat with rate limiting and fallback logic
  • Ensuring secure and scalable wallet transactions using Supabase RLS
  • Integrating multiple AI providers while maintaining a unified UX

Accomplishments

  • Built and deployed a fully functional marketplace in under 5 hours
  • Seamless integration with both Echo SDK and Gemini API
  • Responsive, intuitive UI with clear onboarding and purchase flows
  • Secure backend with fine-grained access control and real-time updates
  • Live deployment with working preview, purchase, and leaderboard features

What We Learned

  • Echo SDK offers robust streaming capabilities for chat-based UX
  • Gemini API excels at creative generation and sponsor alignment
  • Supabase RLS simplifies secure access control for multi-user systems
  • Preview-before-purchase significantly improves user engagement and conversion
  • Prompt monetization is a viable model for the emerging creator economy

What’s Next

  • Prompt versioning and A/B testing
  • Creator analytics dashboard with usage insights
  • Prompt bundles, subscriptions, and tiered pricing
  • Community ratings, reviews, and moderation tools
  • Public API for programmatic access and third-party integrations
  • Multi-model support: Claude, Gemini, GPT, Mistral, and more

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