Rule of 72 Engine Connector for AI agents.

Q: What milestones are included in the growth projection?

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

3 live capabilities

Calculate precise investment doubling times and growth milestones.

Live agent request Rule of 72 Engine / Connector

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AI Agent

Why people use Rule of 72 Engine

Rule of 72 Doubling Engine: Accurate Investment Growth Projections

This Connector changes that. You can ask your agent to run the numbers through the Rule of 72 Doubling Engine to get the exact doubling period. It gives you the precise math and the error percentage in one go. You get a clear picture of reality without the manual work.

What Vinkius changes

You get mathematically accurate investment growth projections instead of relying on loose approximations.

Use it from Claude, ChatGPT, Cursor or another AI client you already have.

One account · 6,100+ Connectors

Real-world use case 01

Client Pitch Accuracy

An advisor wants to know if a 12% return really doubles money in 6 years.
Real-world use case 02

Portfolio Roadmapping

A user wants a roadmap for a $10k investment at 8% to see when it hits $40k.
Real-world use case 03

High-Rate Stress Testing

An analyst needs to see how much the Rule of 72 drifts at high interest rates like 20% to see if it's still usable for their model.

Complete set · 3capabilities

The complete Rule of 72 Engine capability set.

These are the exact actions your AI can choose when you ask it to work with Rule of 72 Engine.

Capability set01 / 01

01—03

3 capabilities in this set.

Part of 3 available through Rule of 72 Engine.

01 Capability
Get doubling comparison
Compares the exact doubling period against the Rule of 72 estimate. It shows you the precise period and the error percentage.
02 Capability
Get growth milestones
Creates a timeline of your capital's expansion through powers of two. It shows values for 2x, 4x, and up to 64x.
03 Capability
Get precision reliability
Determines if the Rule of 72 is a reliable shortcut for a specific interest rate. This helps you spot where the math fails.

Set up in minutes

One URL. Then ask Rule of 72 Engine to work.

Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use Rule of 72 Engine from the conversation.

Choose your client

Live preview

Advanced clients IDE · CLI

Claude · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp

Step 01

Open Connectors

In Claude Web or Claude Desktop, open Settings and choose Connectors.
Step 02

Add the URL

Choose Add custom connector, name it Rule of 72 Engine, and paste the URL above.
Step 03

Turn it on in chat

Select +, open Connectors, and enable Rule of 72 Engine for the conversation.

ChatGPT · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp

Step 01

Open MCP settings

On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
Step 02

Add the URL

Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the Rule of 72 Engine URL.
Step 03

Save and start

Save the connection and enable Rule of 72 Engine in your conversation. Desktop may ask you to restart once.

Cursor · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "rule-of-72-doubling-engine": {
      "url": "https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp"
    }
  }
}

Step 01

Open MCP Settings

Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
Step 02

Add the server config

Paste the JSON configuration above into the mcp.json file that opens
Step 03

Save the file

Cursor will automatically detect the new Connector
Step 04

Start using Rule of 72 Engine

Open Agent mode in chat and ask: "Using Rule of 72 Engine, help me...". 3 tools available

VS Code Copilot · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "rule-of-72-doubling-engine": {
      "url": "https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp"
    }
  }
}

Step 01

Create MCP config

Create a .vscode/mcp.json file in your project root
Step 02

Add the server config

Paste the JSON configuration above
Step 03

Enable Agent mode

Open GitHub Copilot Chat and switch to Agent mode using the dropdown
Step 04

Start using Rule of 72 Engine

Ask Copilot: "Using Rule of 72 Engine, help me...". 3 tools available

Windsurf · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "rule-of-72-doubling-engine": {
      "url": "https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp"
    }
  }
}

Step 01

Open MCP Settings

Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
Step 02

Add the server

Paste the JSON configuration above into mcp_config.json
Step 03

Save and reload

Windsurf will detect the new server automatically
Step 04

Start using Rule of 72 Engine

Open Cascade and ask: "Using Rule of 72 Engine, help me...". 3 tools available

Cline · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "rule-of-72-doubling-engine": {
      "url": "https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp"
    }
  }
}

Step 01

Open Cline MCP Settings

Click the Connectors icon in the Cline sidebar panel
Step 02

Add remote server

Click "Add Connector" and paste the configuration above
Step 03

Enable the server

Toggle the server switch to ON
Step 04

Start using Rule of 72 Engine

Ask Cline: "Using Rule of 72 Engine, help me...". 3 tools available

Claude Code · Terminal command

Official guide ↗

Advanced setup

claude mcp add rule-of-72-doubling-engine --transport http "https://edge.vinkius.com/vk_preview_NS03I8i5i3uq954YWYa9kHanKQ0kkCvCgGTQeLwh/mcp"

Step 01

Install Claude Code

Run npm install -g @anthropic-ai/claude-code if not already installed
Step 02

Add the Connector

Run the command above in your terminal
Step 03

Verify the connection

Run claude mcp to list connected servers, or type /mcp inside a session
Step 04

Start using Rule of 72 Engine

Ask Claude: "Using Rule of 72 Engine, show me...". 3 tools are ready

Where the request belongs

Work Rule of 72 Engine can move forward.

Built around the request

Financial advisors who need to provide accurate growth projections to high-net-worth clients without doing manual logs.

Financial Advisor

Checking if a Rule of 72 pitch is actually accurate for a client's specific portfolio during a meeting.

Investment Analyst

Building growth models for different asset classes and verifying the drift in common heuristics.

Retirement Planner

Showing clients exactly when they'll hit specific capital milestones like 4x or 8x based on realistic rates.

Build the capability set

Each Connector adds new actions and data without changing how you work.

Browse Connectors

01 3 capabilities

Compound Interest Optimizer

Detailed investment growth projections accounting for inflation, taxes, and penalties.

View Connector

02 3 capabilities

Inflation-Adjusted Return Calculator

Calculate real investment returns by adjusting nominal rates against inflation.

View Connector

03 3 capabilities

FIRE Calculator

Estimate your timeline and capital requirements for Financial Independence, Retire Early (FIRE).

View Connector

04 3 capabilities

Growth Rate Calculator

Calculate MoM, QoQ, YoY growth rates and model multi-scenario financial projections (CAGR, Rule of 40) from historical revenue data.

View Connector

05 4 capabilities

Finance Toolkit

Empower your AI agents to compute complex financial formulas. Instantly calculate ROI, compound interests, and SAC/Price amortization tables local.

View Connector

06 2 capabilities

Financial Math Engine

Equip your AI with zero-hallucination financial calculation powers. Calculate flawless Amortization Schedules (SAC/PRICE), Compound Interest, and Loan projections.

View Connector

Bring your own AI

Change the model, client or framework. Keep Rule of 72 Engine connected.

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Before you connect

Questions about Rule of 72 Engine.

The practical details behind the request, access and result.

Can the Rule of 72 Doubling Engine help with retirement planning?

Yes. It helps you calculate exactly how long it will take for your nest egg to double at various interest rates, providing much more accurate timelines than basic shortcuts.

How accurate is the Rule of 72 for high interest rates?

It becomes less reliable as rates go up. This Connector lets you check the exact reliability and error percentage for any specific rate so you don't have to guess.

Can I get a full timeline of my investment growth?

Yes. You can generate a complete roadmap showing exactly when your capital hits milestones like 2x, 4x, and up to 64x based on your specific growth rate.

Is this capability good for comparing different interest rates?

It's perfect for that. You can quickly see how much the doubling time changes between different rates and how much the common Rule of 72 shortcut drifts in each case.

How does this Connector handle compound interest math?

It uses precise logarithmic calculations to determine the real doubling periods, giving you a much higher level of accuracy than standard financial shortcuts.

Can I use this to see how much my money will actually double?

Exactly. It provides the precise time period for your money to double and shows you the exact difference between that reality and the common Rule of 72 estimate.

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.

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.

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.

One connection away

Give your agent a direct line to Rule of 72 Engine.

Connect Rule of 72 Engine once. Keep it beside 6,100+ managed Connectors when the next task needs more.

Explore every Connector No credit card required · Free tier available

Rule of 72 Doubling Engine: Accurate Investment Growth Projections

You get mathematically accurate investment growth projections instead of relying on loose approximations.

Client Pitch Accuracy

Portfolio Roadmapping

High-Rate Stress Testing

Get doubling comparison

Get growth milestones

Get precision reliability

Open Connectors

Add the URL

Turn it on in chat

Open MCP settings

Add the URL

Save and start

Open MCP Settings

Add the server config

Save the file

Start using Rule of 72 Engine

Create MCP config

Add the server config

Enable Agent mode

Start using Rule of 72 Engine

Open MCP Settings

Add the server

Save and reload

Start using Rule of 72 Engine

Open Cline MCP Settings

Add remote server

Enable the server

Start using Rule of 72 Engine

Install Claude Code

Add the Connector

Verify the connection

Start using Rule of 72 Engine

Financial Advisor

Investment Analyst

Retirement Planner

Compound Interest Optimizer

Inflation-Adjusted Return Calculator

FIRE Calculator

Growth Rate Calculator

Finance Toolkit

Financial Math Engine

Give your agent a direct line to Rule of 72 Engine.