4ca20f21c4* Restructure threejs-server README to match marketing examples - Update title format to "Example: Three.js App" - Constrain screenshot width using table layout - Add Features section with key capabilities - Reorganize Running section with Tool Input subsection - Add Architecture section describing server and app components - Remove implementation-focused sections (WidgetProps, Creating a New Widget) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Add bun as devDependency to example packages npm install now automatically installs bun, eliminating the need for separate installation instructions. Removed manual bun install step from customer-segmentation-server README. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Add start:http and start:stdio npm scripts to examples For the 6 examples supporting --stdio transport, add explicit scripts: - serve:http / serve:stdio for running the server - start:http / start:stdio for build + serve - start now aliases to start:http for backward compatibility Update READMEs to document both transport options. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Default basic-host SERVERS to localhost:3001/mcp - Change threejs-server default port from 3109 to 3001 for consistency - Add default SERVERS value in basic-host serve.ts - Document SERVERS env var in basic-host README 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Improve Examples section in README Frame the three basic examples as foundational starting points and add a link to the examples directory for additional demo apps. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
58 lines
2.6 KiB
Markdown
58 lines
2.6 KiB
Markdown
# Example: Cohort Heatmap App
|
|
|
|
A demo MCP App that displays cohort retention data as an interactive heatmap, showing customer retention over time by signup month.
|
|
|
|
<table>
|
|
<tr>
|
|
<td><a href="https://modelcontextprotocol.github.io/ext-apps/screenshots/cohort-heatmap-server/01-initial-view.png"><img src="https://modelcontextprotocol.github.io/ext-apps/screenshots/cohort-heatmap-server/01-initial-view.png" alt="Initial view" width="100%"></a></td>
|
|
<td><a href="https://modelcontextprotocol.github.io/ext-apps/screenshots/cohort-heatmap-server/02-hover-state.png"><img src="https://modelcontextprotocol.github.io/ext-apps/screenshots/cohort-heatmap-server/02-hover-state.png" alt="Hover state" width="100%"></a></td>
|
|
<td><a href="https://modelcontextprotocol.github.io/ext-apps/screenshots/cohort-heatmap-server/03-low-retention-hover.png"><img src="https://modelcontextprotocol.github.io/ext-apps/screenshots/cohort-heatmap-server/03-low-retention-hover.png" alt="Low retention hover" width="100%"></a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
## Features
|
|
|
|
- **Cohort Retention Heatmap**: Color-coded grid showing retention percentages across cohorts and time periods
|
|
- **Multiple Metrics**: Switch between Retention %, Revenue Retention, and Active Users
|
|
- **Period Types**: View data by monthly or weekly intervals
|
|
- **Interactive Exploration**: Hover cells for detailed tooltips, click to highlight rows/columns
|
|
- **Color Scale**: Green (high retention) through yellow to red (low retention)
|
|
- **Theme Support**: Adapts to light/dark mode preferences
|
|
|
|
## Running
|
|
|
|
1. Install dependencies:
|
|
|
|
```bash
|
|
npm install
|
|
```
|
|
|
|
2. Build and start the server:
|
|
|
|
```bash
|
|
npm run start:http # for Streamable HTTP transport
|
|
# OR
|
|
npm run start:stdio # for stdio transport
|
|
```
|
|
|
|
3. View using the [`basic-host`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-host) example or another MCP Apps-compatible host.
|
|
|
|
## Architecture
|
|
|
|
### Server (`server.ts`)
|
|
|
|
Exposes a single `get-cohort-data` tool that returns:
|
|
|
|
- Cohort rows with signup month, original user count, and retention cells
|
|
- Period headers and labels
|
|
- Configurable parameters: metric type, period type, cohort count, max periods
|
|
|
|
The tool generates synthetic cohort data using an exponential decay model with configurable retention curves per metric type.
|
|
|
|
### App (`src/mcp-app.tsx`)
|
|
|
|
- Uses React for the heatmap visualization
|
|
- Fetches data on mount and when filters change
|
|
- Displays retention percentages in a grid with HSL color interpolation
|
|
- Shows detailed tooltips on hover with user counts and exact retention values
|
|
- Supports row/column highlighting on cell click
|