13 OctBuild A Knowledge Base For Agents (with Sanity)

GenUI Data Explorer

Ask questions about your data and explore the answers with interactive charts, tables, and metric cards. A Mastra agent selects React components from a catalog to present each answer in a CopilotKit chat. Start with the included sample Sales dataset to try generative UI without connecting your own database.

Why we built this

A text answer is not always the best way to explore data. Trends need charts, comparisons need context, and individual records need tables. This template shows how to build generative UI with Mastra: the agent chooses what to display as the conversation evolves, while your components control how it looks and behaves.

Demo

Prerequisites

  • Node.js 24.15.0 or later and NPM.
  • OpenAI API key: set OPENAI_API_KEY in .env for the default gpt-4.1-mini model. Optionally set ANALYSIS_MODEL to another OpenAI model ID available to your account.

Quickstart 🚀

  1. Create the project
    • Run npx create-mastra@latest genui-data-explorer --template genui-data-explorer.
    • Run cd genui-data-explorer, then npm install.
  2. Add your API key
    • Run cp .env.example .env and fill in the key described under Prerequisites.
  3. Start the app
    • Run npm run dev. This starts the Mastra server and web app and prepares the sample data automatically on the first run.
    • Open the data explorer and ask “Show monthly bookings over the last twelve complete months.” Look for a trend chart with the underlying values.

Try it out

  • Ask “Compare bookings by segment over the last twelve complete months” to see a ranked comparison.
  • Follow up with “Show the same analysis for SMB” to explore a filtered view.
  • Ask “Show closed-won opportunity records for the last complete month” to inspect a table of deals.
  • Ask “Show a customer retention cohort heatmap for the last twelve complete months” to explore retention by activation month.
  • Use Correct this view to change an answer's interpretation. The correction updates that card without changing source records. Return through Chat history to continue a saved conversation.

Customization

  • Ask your coding agent: “Add a compact bookings summary component and teach the agent when to choose it. Explore the code and propose a plan before making changes.” Follow Adding UI components for catalog registration, rendering, and selection instructions.
  • Connect your own data or adapt the example to another domain. See Data sources for the source contract and related Mastra templates for databases, PDFs, CSVs, and documents.

For the startup flow, server/client boundaries, and independent deployment commands, see Architecture and deployment.

About Mastra templates

Mastra templates are starting points you can run, explore, and adapt. Official templates live in the Mastra monorepo and are synchronized to standalone repositories.

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