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Jonathan Hefner 4ca20f21c4

Smoothen the process of getting started (#103 )

* 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)

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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>

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-09 16:15:32 +01:00

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Example: SaaS Scenario Modeler

A React-based demo MCP App that lets users adjust SaaS business parameters and see real-time 12-month projections of revenue, costs, and profitability with comparison against pre-built scenario templates.

Features

Interactive Parameters: 5 sliders for Starting MRR, Growth Rate, Churn Rate, Gross Margin, and Fixed Costs
12-Month Projections: Line chart showing MRR, Gross Profit, and Net Profit over time
Scenario Templates: 5 pre-built business strategies (Bootstrapped, VC Rocketship, Cash Cow, Turnaround, Efficient Growth)
Template Comparison: Overlay dashed lines to compare your scenario against any template
Summary Metrics: Key metrics including Ending MRR, Total Revenue, Total Profit, and break-even month
Theme Support: Adapts to light/dark mode preferences

Running

Install dependencies:
```
npm install
```

Build and start the server:

npm run start:http  # for Streamable HTTP transport
# OR
npm run start:stdio  # for stdio transport

View using the basic-host example or another MCP Apps-compatible host.

Architecture

Server (`server.ts`)

Exposes a single get-scenario-data tool that returns:

5 pre-built scenario templates with parameters, projections, and summaries
Default input values for the sliders
Optionally computes custom projections when customInputs are provided

The tool is linked to a UI resource via _meta[RESOURCE_URI_META_KEY].

App (`src/`)

Built with React for reactive slider updates and derived state management
Uses Chart.js for the line chart visualization
All projection calculations run client-side for instant slider feedback
Components: SliderRow, MetricCard, ProjectionChart
Template comparison shown as dashed overlay lines on the chart

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