# Magic Number Calculator MCP for AI Agents AI Agent Connect > The Magic Number Calculator MCP helps you measure how efficiently your sales and marketing spend actually turns into new revenue. It takes your Net New ARR and S&M spend to provide a clear look at your growth engine's health. Use it to see if your spending is working or if you're just burning cash. ## Overview - **Category:** finance - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_TQeAOYChQ2JRBFEdaNVzEAjtz55h5Ww9wydTcKWF/ai-agent-connect - **Tags:** saas, gtm, efficiency, revenue, metrics ## Description The Magic Number Calculator MCP helps you measure how efficiently your sales and marketing spend actually turns into new revenue. Imagine you're trying to figure out if your recent marketing push actually worked or if you're just throwing money at a leaky bucket. Usually, this means hunting through spreadsheets, pulling spend from one dashboard, and trying to reconcile it with revenue numbers from another. You have to do the math manually, and even then, it's hard to know if the resulting number is actually good. This Connector changes that. You can just tell your agent to run the numbers for you. It takes your Net New ARR and your Sales and Marketing spend to spit out your Magic Number. From there, it tells you if your performance is in the Inefficient, Healthy, or Excellent tier. It's a way to get a pulse check on your SaaS growth without the manual headache. Because Vinkius makes it easy to connect this to your favorite AI client, you can get these insights in seconds instead of hours. It's about making sure your growth engine is actually moving the needle. ## Tools ### calculate_magic_number Get the raw Magic Number ratio based on your revenue and spending data. This helps you see the direct relationship between spend and new ARR. ### evaluate_gtm_health_summary Get a full diagnostic summary of your overall Go-To-Market engine health. This provides a high-level look at your scaling efficiency. ### get_efficiency_rating See which performance tier your growth falls into, like Inefficient or Excellent. This gives you a clear label for your current trajectory. ## Prompt Examples **Prompt:** ``` Calculate my Magic Number with $500,000 Net New ARR and $400,000 S&M spend. ``` **Response:** ``` Your Magic Number is **1.25**, which indicates an **Excellent** level of efficiency. Here is the breakdown: * **Net New ARR:** $500,000 * **S&M Spend:** $400,000 * **Ratio:** 1.25 This suggests your growth engine is highly effective at converting spend into new revenue. ``` **Prompt:** ``` What is the efficiency rating for a magic number of 0.4? ``` **Response:** ``` A Magic Number of **0.4** falls into the **Inefficient** tier. **What this means for you:** * Your cost to acquire revenue is currently too high. * You may need to optimize your marketing channels or refine your sales process. * Focus on improving capital efficiency to ensure sustainable growth. ``` **Prompt:** ``` Evaluate my GTM health: $200,000 Net New ARR and $300,000 S&M spend. ``` **Response:** ``` ### GTM Health Diagnostic * **Status:** Inefficient * **Current Ratio:** 0.67 **Analysis:** Your current growth engine needs optimization to improve capital efficiency. The high ratio of S&M spend to Net New ARR suggests that your acquisition costs are currently outweighing your new revenue gains. ``` ## Capabilities ### Calculate the Magic Number Get the raw ratio of revenue to spend to see your basic growth efficiency. ### Categorize performance tiers See if your growth falls into Inefficient, Healthy, or Excellent categories. ### Generate a growth diagnostic Get a high-level summary of your overall Go-To-Market engine health. ### Analyze spending efficiency Identify where your S&M budget is underperforming relative to revenue. ### Evaluate scaling capacity Determine if your current model can handle more spend effectively. ## Use Cases ### Investor Reporting A founder needs to show a VC that their growth is efficient. They ask the agent to summarize the health of their GTM engine using `evaluate_gtm_health_summary`. ### Budget Planning A marketing lead wants to know if they can afford to spend more. They use `calculate_magic_number` to see if their current ratio allows for more aggressive spending. ### Quarterly Reviews A finance lead wants a quick pulse check. They ask the agent to categorize their current performance using `get_efficiency_rating`. ### Strategy Pivot A team sees an Inefficient rating and asks the agent to look for specific areas where they can optimize capital efficiency. ## Benefits - Stop guessing about ROI. Use `calculate_magic_number` to see exactly how much revenue you get per dollar spent on S&M. - Identify growth bottlenecks. `evaluate_gtm_health_summary` highlights where your engine is stalling or wasting money. - Benchmark your performance. `get_efficiency_rating` puts your numbers into clear categories so you know where you stand. - Speed up reporting. You don't have to build complex formulas in spreadsheets every time you need a status update. - Better budget allocation. Use the data to decide where to double down and where to cut back on spending. ## How It Works The bottom line is you get an instant, accurate health check on your SaaS growth efficiency. 1. Provide your current quarter's Net New ARR and previous quarter's S&M spend to your agent. 2. The Connector processes these figures to calculate your specific Magic Number. 3. You get a clear efficiency rating and a summary of your growth engine's health. ## Frequently Asked Questions **What is the Magic Number in SaaS?** The Magic Number is a ratio that compares your Net New ARR to your Sales and Marketing spend. It tells you how many dollars of new revenue you generate for every dollar you spend on growth. **How does the Magic Number Calculator help my growth?** It gives you a clear signal on whether your growth engine is healthy or inefficient. By tracking this number over time, you can see if your marketing efforts are becoming more effective as you scale. **Can I use this to see if my marketing spend is too high?** Yes, the Magic Number Calculator identifies if your spend is yielding the expected revenue. It categorizes your performance into tiers like Inefficient or Excellent to help you spot issues quickly. **What does an Excellent rating mean for my business?** An Excellent rating means your growth engine is highly efficient. It suggests that you are successfully converting your S&M spend into high-quality revenue at a rate that supports healthy scaling. **How do I get a health summary for my GTM engine?** You can simply ask your AI agent to evaluate your GTM health by providing your recent revenue and spend figures. The Connector will then generate a diagnostic summary of your scaling efficiency. **Is the Magic Number Calculator good for VC reporting?** It is a great tool for VC reporting because it provides a standardized metric for growth efficiency. It helps you prove to investors that your growth is sustainable and capital-efficient. **What is the Magic Number?** The Magic Number is a SaaS metric that measures the efficiency of your Sales and Marketing spending relative to the revenue growth it generates. **How do I interpret the results?** A ratio below 0.5 is considered inefficient, a ratio of 0.75 or higher is healthy, and a ratio of 1.0 or greater is excellent. **What inputs are required for the calculation?** You need to provide your Net New ARR from the current quarter and your Sales and Marketing spend from the previous quarter.