# Subscription Box Unit Economics Engine. AI Agent Connect

> Subscription Box Unit Economics Engine gives your AI agent the math it needs to model subscription business health. It calculates contribution margins, customer lifetime value, and payback periods while accounting for shipping, churn, and payment fees. You can run sensitivity tests and cohort growth simulations directly within your AI client.

## Overview
- **Category:** finance
- **Price:** Free
- **Endpoint:** https://edge.vinkius.com/vk_preview_fEZbKKkCzRx9j56jfrE9vYwt812UotsSq5OTNd8H/ai-agent-connect
- **Tags:** subscription, unit-economics, ltv, profitability, financial-modeling

## Description

Running a subscription box business means managing a constant tug-of-war between acquisition costs and churn. This MCP gives your AI client the specific financial logic required to navigate those numbers. Instead of guessing how a price hike or a shipping increase affects your bottom line, you can ask your agent to run the math for you. 

It handles the heavy lifting of calculating contribution margins and LTV by factoring in the granular details that actually matter, like payment processing fees and fulfillment costs. You can dig into your cost structure to see exactly where your revenue is leaking, or simulate how a specific cohort of customers will behave over several months. It turns your AI from a simple chat interface into a specialized financial analyst that understands the unique unit economics of the subscription box industry.

## Tools

### analyze_sensitivity
This tool measures how much your LTV shifts when you change a single cost or rate. It's useful for seeing how sensitive your business is to specific variables.

### get_margin_breakdown
This tool provides a granular look at your revenue distribution. Use it to pinpoint exactly which costs are eating into your margins.

### simulate_cohort_growth
This tool projects the monthly profit of a specific customer group over time. It uses your initial acquisition and churn numbers to forecast long-term performance.

### calculate_unit_economics
This tool computes the fundamental profitability metrics for a single subscription. It returns your contribution margin and LTV based on your specific inputs.

## Prompt Examples

**Prompt:** 
```
Calculate the unit economics for a box priced at $40 with a $15 product cost, $5 packaging, $3 fulfillment, $6 shipping, a 3% payment fee, and 5% monthly churn.
```

**Response:** 
```
The contribution margin is $14.88, the LTV is $297.60, the payback period is 3.4 months, and the break-even churn rate is 37.2%.
```

**Prompt:** 
```
Show me the cost breakdown for a $50 subscription box where product costs are $20 and shipping is $8.
```

**Response:** 
```
The total variable costs are $32.50, leaving a net margin of $17.50. Product costs account for 40% of the price, while shipping accounts for 16%.
```

**Prompt:** 
```
If I increase my product cost by $2, how much will my LTV decrease?
```

**Response:** 
```
Increasing the product cost by $2 reduces the LTV from $300.00 to $240.00, representing a 20% decrease.
```

## Capabilities

### Profitability Modeling
Your agent uses this to determine the core financial health of a single subscription unit.

### Cost Analysis
The AI uses this to identify which specific expenses are driving down your margins.

### Risk Assessment
Your agent runs sensitivity tests to see how small changes in costs impact your lifetime value.

### Growth Forecasting
The AI simulates cohort behavior to project future monthly profits based on churn.

## Use Cases

### Pricing Strategy Tests
Test how a price increase affects your LTV and payback period before you roll it out to customers.

### Shipping Cost Impact
See exactly how a rise in carrier rates will impact your contribution margin.

### Churn Management
Simulate how different churn rates will affect the total profit of a customer cohort over time.

### Margin Auditing
Use the breakdown tool to find out if packaging or payment fees are becoming too expensive.

## Benefits

- Calculates LTV and payback periods using real-world variables like churn and fees.
- Identifies cost-heavy areas through detailed margin breakdowns.
- Tests business sensitivity to cost changes without manual recalculations.
- Projects long-term cohort profitability based on acquisition and churn data.

## How It Works

Connect your AI client to Vinkius and start running financial models immediately.

1. Connect your AI client to the Vinkius-hosted MCP.
2. Provide your business variables like price, product cost, and churn rate.
3. Ask your AI agent to calculate specific metrics or run simulations.
4. Review the calculated LTV, margins, or cohort projections in your chat interface.

## Frequently Asked Questions

**What metrics does this MCP calculate?**
It calculates contribution margin, customer lifetime value (LTV), payback periods, and cohort growth projections.

**Can I use this with Claude or Cursor?**
Yes, you can connect this MCP to any MCP-compatible client including Claude, Cursor, and Windsurf.

**How does it handle shipping and fees?**
The engine includes shipping costs and payment fees as variables in its profitability and LTV calculations.

**Do I need to host the MCP myself?**
No, Vinkius hosts and manages the MCP for you. You just connect your client and it is ready to use.

**Can I test how a cost increase affects my business?**
Yes, you can use the sensitivity analysis tool to see how adjusting a specific cost or rate changes your LTV.

**How does this tool calculate LTV?**
LTV is calculated by dividing the contribution margin per unit by the monthly churn rate.

**Can I test how shipping increases affect my profit?**
Yes, you can use the `analyze_sensitivity` tool to adjust the shipping cost and see the resulting change in LTV.

**What is included in the contribution margin?**
The contribution margin is the effective price (monthly price minus discounts) minus all variable costs: product, packaging, fulfillment, shipping, and payment fees.