An astronaut overseeing a futuristic data hub
Download PDFMarkdown Version

Connect Rule Of 72 Doubling Engine 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. Verify if your investment shortcuts are actually accurate.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

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 Rule of 72 Engine.

  1. 01

    Get precision reliability

    This capability checks if the Rule of 72 shortcut remains a reliable heuristic for a specific interest rate.

  2. 02

    Get doubling comparison

    This capability compares exact doubling periods against Rule of 72 estimates and returns the error percentage.

  3. 03

    Get growth milestones

    This capability generates a timeline of capital expansion based on doubling intervals, showing time and value.

Real work

What teams actually run

01

High-Yield Verification

Check if the Rule of 72 is still useful when evaluating high-interest investment opportunities.

02

Long-term Planning

Generate a timeline of how an initial investment reaches 4x, 8x, or 16x its original value.

03

Error Auditing

Compare a quick estimate against a precise calculation to see how much drift exists.

04

Milestone Tracking

Calculate the specific time periods required to hit various doubling targets.

One connector, every AI

Rule of 72 Engine 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 Rule of 72 Engine 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

664ms average. Fast in production.

Rule of 72 Engine is checked daily against the live service.

Daily averagePeak 1224ms
Oct 3Today
Fastest day
539ms
Slowest day
1224ms
14-day trend
Stable+1%

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 Rule of 72 Engine, so you can see the experience inside your AI.

It does not authenticate your account with Rule of 72 Engine. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Rule of 72 Engine Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/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 — Rule of 72 Engine capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "rule-of-72-doubling-engine-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/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 Rule of 72 Engine in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Rule of 72 Engine owners hand off.

This MCP is built for people managing investment projections who need more than just a rough estimate. It helps professionals move from mental approximations to mathematically sound timelines.

  • 01

    Financial Analysts

    They hand off the task of verifying approximation drift to the agent.

  • 02

    Wealth Managers

    They use the agent to generate precise growth milestones for client reports.

  • 03

    Individual Investors

    They use the agent to check if high-yield shortcuts are actually trustworthy.

FAQ

Questions Rule of 72 Engine owners ask.

  • 01

    What is the Rule of 72?

    It is a mental math shortcut used to estimate how long it takes an investment to double given a fixed annual rate of return.

  • 02

    When does the Rule of 72 become inaccurate?

    The approximation begins to drift more significantly as interest rates increase, making it less reliable for high-yield scenarios.

  • 03

    Can I use this with Claude or Cursor?

    Yes, you can connect this MCP to any MCP-compatible client including Claude, Cursor, and Windsurf.

  • 04

    How does this MCP handle growth projections?

    It uses the get_growth_milestones capability to generate a timeline of value expansion through doubling intervals.

  • 05

    Does this MCP require an API key for a finance service?

    No, Vinkius hosts the MCP and manages the execution, so you just connect and use it.

  • 06

    How accurate is the Rule of 72 estimate?

    The accuracy varies depending on the interest rate. You can use get_doubling_comparison to calculate the exact percentage error between the true logarithmic doubling time and the Rule of 72 approximation.

  • 07

    What milestones are included in the growth projection?

    The get_growth_milestones capability tracks your investment through exponential expansion stages, specifically at 2x, 4x, 8x, 16x, 32x, and 64x the original principal.

  • 08

    Can I use this for different starting amounts?

    Yes. When using get_growth_milestones, you can provide a startingPrincipal value to see the projected monetary value at each doubling event.

Explore

More in Finance

Suggestions

Connect Rule of 72 Engine to Claude, Cursor, ChatGPT & more