Vinkius
Magic Number Calculator

Magic Number Calculator MCP for AI. Stop guessing if your marketing spend is working.

Claude Claude
ChatGPT ChatGPT
Cursor Cursor
Gemini Gemini
Windsurf Windsurf
VS Code VS Code
JetBrains JetBrains
Vercel Vercel
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Works with every AI agent you already use

…and any MCP-compatible client

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Connect to your AI in seconds.

Magic Number Calculator helps you figure out if your sales and marketing spend is actually working. It takes your Net New ARR and compares it against your S&M spend to give you a clear picture of your growth engine's health.

Stop guessing if your spend is efficient and start using a concrete ratio to guide your budget. Use it to spot waste, justify spend, and see your scaling efficiency clearly.

What your AI can do

Calculate magic number

Calculates the raw ratio of Net New ARR to S&M spend.

Evaluate gtm health summary

Generates a full diagnostic report on your growth engine's efficiency.

Get efficiency rating

Assigns your Magic Number to a specific performance tier like Inefficient or Excellent.

Calculate the raw growth ratio

Get the exact number representing your revenue growth relative to marketing spend.

Categorize your performance tier

See if your current growth metrics fall into Inefficient, Healthy, or Excellent categories.

Get a full growth diagnostic

Receive a complete summary of your growth engine's health and scaling efficiency.

Compare revenue to spend

Instantly see how much new revenue you're generating against your previous spending.

Identify budget waste

Spot when your cost to acquire revenue is climbing too high for your current scale.

Determine growth health status

Get a clear status update on whether your growth engine is performing as expected.

Included with Plan

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AI Agent

Magic Number Calculator (3 tools)

Get instant growth efficiency ratios and GTM health diagnostics with three specialized tools.

Make your AI actually useful.

Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.

Start using Magic Number Calculator on Vinkius

Calculate Magic Number

Calculates the raw ratio of Net New ARR to S&M spend.

Evaluate Gtm Health Summary

Generates a full diagnostic report on your growth engine's efficiency.

Get Efficiency Rating

Assigns your Magic Number to a specific performance tier like Inefficient or...

Security and governance baked right in.

Pick your AI client below to get set up. Just create a Vinkius account, subscribe, and you're instantly up and running. We handle the entire backend infrastructure, delivering out-of-the-box support for HTTPS Streamable, SSE, and OAuth2—zero messy routing required.

Claude AI

Claude AI

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.

2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL:

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.

3

Start a conversation

Open a new chat. The Magic Number Calculator integration is available immediately — no restart needed.

Choose How to Get Started

Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.

Build Your Own

Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.

  • Import from OpenAPI, Swagger, or YAML specs
  • Create Agent Skills with progressive disclosure
  • Deploy to edge with MCPFusion framework
  • Built in DLP, auth, and compliance on every call
  • Real time usage dashboard and cost metering
  • Publish to catalog or keep private
Start building

Make Your AI Do More

Start with Magic Number Calculator, then connect any of our 5,100+ other servers whenever your AI needs more. One click, no limits.

  • Use this MCP plus 5,100+ others, all in one place
  • Add new capabilities to your AI anytime you want
  • Every connection is secured and compliant automatically
  • Track usage and costs across all your servers
  • Works with Claude, ChatGPT, Cursor, and more
  • New servers added to the catalog every week
Magic Number Calculator MCP server cover

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Magic Number Calculator. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Works with Claude, ChatGPT, Cursor, and more

The Model Context Protocol standardizes how applications expose capabilities to LLMs. Instead of operating in isolation, your AI gains direct access to external platforms, live data, and real-world actions through secure, standardized connections.

This connection provides 3 powerful capabilities that interface natively with Claude, ChatGPT, Cursor, and other compatible AI platforms. No middleware. No custom integration required.

Stop guessing if your marketing spend is actually working.

Most growth teams end up with a mess of spreadsheets. You're constantly pulling Net New ARR from one tab and S&M spend from another, trying to remember which quarter's data belongs where. You do the math, double-check it, and then try to explain the result to a CFO who just wants to know if the money is being wasted.

This MCP cuts that out. You just tell your agent the numbers, and it gives you the ratio and a health rating instantly. You move from manual data entry to having a clear diagnostic of your growth engine's efficiency in seconds.

Magic Number Calculator gives you a clear growth diagnostic.

No more manual math, no more hunting for spend figures in different accounts, and no more vibes-based reporting.

You get a straight answer on your growth efficiency every single time.

What your AI can actually do with this

Most growth teams struggle to tell if they're actually being efficient or just throwing money at a problem. You need a way to see if your spend is yielding a return that makes sense for your current scale. This MCP does the heavy lifting by crunching those specific numbers for you.

Instead of jumping between spreadsheets and manually calculating ratios every time a stakeholder asks for an update, you just ask your agent to run the numbers. It looks at your current revenue against your previous spending to tell you exactly where you stand. Because it's part of the Vinkius catalog, you can plug it right into your existing setup and get answers in seconds.

It's about moving from "I think we're doing well" to "here is the exact ratio of our efficiency." You get a clear diagnostic of your business scaling without the manual math errors that plague big spreadsheets. It helps you spot when your cost to acquire revenue is getting too high before it becomes a major problem.

You can get a performance tier that tells you if you're in the "Excellent" range or if you need to pull back on the marketing spend. It turns a messy data pull into a single, actionable number that you can actually use in a meeting.

Built · Hosted · Managed by Vinkius Magic Number Calculator - Analyze GTM efficiency
Server ID 019ee3e4-e374-734a-9b41-5864d86024ba
Vinkius Inspector
Compliance Grade A+
Score 100/100
Vinkius Inspector Badge — Score 100/100

Questions you might have

What does the Magic Number Calculator actually do? +

It calculates the ratio of your Net New ARR to your previous S&M spend to show how efficiently you're growing.

How do I know if my growth is healthy with the Magic Number Calculator? +

You can use get_efficiency_rating to see if your ratio falls into the Inefficient, Healthy, or Excellent tiers.

Can the Magic Number Calculator give me a full report? +

Yes, use evaluate_gtm_health_summary to get a complete diagnostic of your growth engine's efficiency.

What numbers do I need for the Magic Number Calculator? +

You need your Net New ARR from the current quarter and your S&M spend from the previous quarter.

Is the Magic Number Calculator good for SaaS companies? +

It's a standard metric for SaaS and any business that spends on sales and marketing to acquire revenue.

Which AI clients are compatible with the Magic Number Calculator? +

You can use this MCP with any AI client that supports the Model Context Protocol. This includes Claude, Cursor, Windsurf, and VS Code.

Does the Magic Number Calculator store my sensitive financial data? +

No, your data is not stored. The MCP processes the numbers you provide during your chat session to give you instant results without keeping your records.

How do I set up the Magic Number Calculator in my AI client? +

You connect it through the Vinkius platform. Once you're subscribed, your AI client will automatically see the tools so you can start running calculations.

Built & Managed by Vinkius 30s setup 3 tools

We've already built the connector for Magic Number Calculator. Just plug in your AI agents and start using Vinkius.

No hosting. No infrastructure. No complex setup.
All 3 tools are live and waiting. You're up and running in seconds.

Vinkius runs on Claude Claude
Vinkius runs on ChatGPT ChatGPT
Vinkius runs on Cursor Cursor
Vinkius runs on Gemini Gemini
Vinkius runs on Windsurf Windsurf
Vinkius runs on VS Code VS Code
Vinkius runs on JetBrains JetBrains
Vinkius runs on Vercel Vercel
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