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Connect Magic Number Calculator to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Determine if your sales and marketing spend drives efficient growth.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through Magic Number Calculator.

  1. 01

    Get efficiency rating

    This capability assigns a performance tier to your Magic Number, such as Inefficient, Healthy, or Excellent.

  2. 02

    Calculate magic number

    This capability computes the raw Magic Number ratio based on your provided revenue and spend data.

  3. 03

    Evaluate gtm health summary

    This capability provides a full diagnostic report on your entire Go-To-Market engine's scaling efficiency.

Real work

What teams actually run

01

Quarterly Business Reviews

Use the capability to quickly summarize how much revenue was generated per dollar spent in the previous quarter.

02

Scaling Decisions

Check your efficiency rating before deciding to increase your sales and marketing budget.

03

Growth Audits

Run a diagnostic to see if your current GTM engine is healthy enough to support aggressive expansion.

04

Investor Reporting

Get precise Magic Number data to demonstrate capital efficiency to stakeholders.

Automate a task

Put Magic Number Calculator to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Magic Number Calculator works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Magic Number Calculator to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

784ms average. Fast in production.

Magic Number Calculator is checked daily against the live service.

Daily averagePeak 958ms
Oct 3Today
Fastest day
555ms
Slowest day
958ms
14-day trend
Improving-11%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Magic Number Calculator, so you can see the experience inside your AI.

It does not authenticate your account with Magic Number Calculator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Magic Number Calculator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_TQeAOYChQ2JRBFEdaNVzEAjtz55h5Ww9wydTcKWF/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Magic Number Calculator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "magic-number-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_TQeAOYChQ2JRBFEdaNVzEAjtz55h5Ww9wydTcKWF/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Magic Number Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Magic Number Calculator owners hand off.

This MCP is built for finance and operations leaders managing SaaS growth metrics.

  • 01

    SaaS Finance Leads

    They hand off ARR and S&M data to the AI to audit capital efficiency.

  • 02

    RevOps Managers

    They use the capability to monitor the health of the sales and marketing engine.

  • 03

    Founders

    They check the Magic Number to decide when to increase growth spend.

FAQ

Questions Magic Number Calculator owners ask.

  • 01

    What is the Magic Number in SaaS?

    It is a ratio used to measure the efficiency of your Go-To-Market engine by comparing Net New ARR to your previous quarter's Sales and Marketing spend.

  • 02

    How do I use this MCP with Claude?

    You connect your Claude client to Vinkius once, and then you can simply ask your agent to calculate your Magic Number using the provided capabilities.

  • 03

    What does an efficient Magic Number look like?

    The capability categorizes performance into tiers, where higher numbers indicate better efficiency and lower numbers suggest your cost to acquire revenue is too high.

  • 04

    Can this MCP help with budget planning?

    Yes, by evaluating your GTM health, it helps you determine if your growth engine is efficient enough to justify more spend.

  • 05

    Do I need to host this myself?

    No, Vinkius hosts and manages the MCP for you, so it is ready to use as soon as you connect your client.

  • 06

    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.

  • 07

    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.

  • 08

    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.

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