What is tax arbitrage in retirement planning?

It is the strategy of contributing to accounts now when your tax rate is high and withdrawing when your tax rate is lower, or vice versa, to minimize total taxes paid.

Which accounts does this MCP optimize?

The MCP focuses on 401k, IRA, and HSA accounts.

Can I use this with Claude?

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

How does it determine the best contribution order?

It analyzes your current marginal tax rate against your projected future tax rate to find the most efficient sequence.

Does this MCP provide actual investment advice?

This MCP provides mathematical calculations and projections based on the tax data and contribution plans you provide to your agent.

How does the optimizer decide which account to fund first?

The engine follows a strict hierarchy: it always prioritizes Employer Match first, followed by HSA eligibility. Then, it uses determine_optimal_sequence to compare your current and future tax rates to decide between Traditional or Roth vehicles.

Can I use this for HSA planning?

Yes. The capability checks your hasHsaEligibility and prioritizes HSA contributions due to their triple tax advantage.

What inputs do I need for wealth projection?

For project_wealth_growth, you will need your annual contribution amount, years until retirement, expected return rate, and a breakdown of how much to allocate to each account.

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Connect US 401k & IRA Optimizer 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. Maximize your retirement wealth through smart tax arbitrage.

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.

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.

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 US 401k & IRA Optimizer.

01
Project wealth growth
This capability projects how your retirement assets will grow over time. It calculates future portfolio balances based on your specific contribution plan.
02
Calculate tax savings
This capability calculates your estimated annual and cumulative tax savings. It quantifies the tax shield benefits of your chosen contribution strategy.
03
Determine optimal sequence
This capability identifies the most efficient order for funding your accounts. It compares your current marginal tax rate against projected future rates to rank 401k, HSA, and IRA contributions.

Real work

What teams actually run

Optimizing Contribution Order

Decide whether to max out your HSA or your 401k first based on your current tax bracket.

Tax Savings Verification

Calculate exactly how much a large pre-tax contribution will reduce your current year tax bill.

Retirement Projections

See how a specific annual investment amount grows over 20 or 30 years.

Bracket Arbitrage

Compare your current marginal tax rate against your projected retirement rate to find savings.

Automate a task

Put US 401k & IRA Optimizer 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

US 401k & IRA Optimizer 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.

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

You don't need a client to put US 401k & IRA Optimizer 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

717ms average. Fast in production.

US 401k & IRA Optimizer is checked daily against the live service.

Daily averagePeak 924ms

Oct 3Today

Fastest day: 536ms
Slowest day: 924ms
14-day trend: Slowing+25%

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 US 401k & IRA Optimizer, so you can see the experience inside your AI.

It does not authenticate your account with US 401k & IRA Optimizer. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

US 401k & IRA Optimizer Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_vI0IYo9TRur9mj0qaHuzPhgVEMEwgJifAsFadWz6/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — US 401k & IRA Optimizer capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "us-401k-ira-optimizer-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_vI0IYo9TRur9mj0qaHuzPhgVEMEwgJifAsFadWz6/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 US 401k & IRA Optimizer in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work US 401k & IRA Optimizer owners hand off.

This MCP is built for individuals managing their own retirement planning and those who want precise tax-driven investment logic.

01
Individual Investors
They use the MCP to find the best way to allocate their savings across different tax-advantaged accounts.
02
Financial Planners
They use the capability to run specific tax arbitrage scenarios for their clients.
03
Tax Strategists
They use the math to verify the tax shield benefits of various contribution sequences.

FAQ

Questions US 401k & IRA Optimizer owners ask.

01
What is tax arbitrage in retirement planning?
It is the strategy of contributing to accounts now when your tax rate is high and withdrawing when your tax rate is lower, or vice versa, to minimize total taxes paid.
02
Which accounts does this MCP optimize?
The MCP focuses on 401k, IRA, and HSA accounts.
03
Can I use this with Claude?
Yes, you can connect this MCP to any MCP-compatible client, including Claude, Cursor, and Windsurf.
04
How does it determine the best contribution order?
It analyzes your current marginal tax rate against your projected future tax rate to find the most efficient sequence.
05
Does this MCP provide actual investment advice?
This MCP provides mathematical calculations and projections based on the tax data and contribution plans you provide to your agent.
06
How does the optimizer decide which account to fund first?
The engine follows a strict hierarchy: it always prioritizes Employer Match first, followed by HSA eligibility. Then, it uses determine_optimal_sequence to compare your current and future tax rates to decide between Traditional or Roth vehicles.
07
Can I use this for HSA planning?
Yes. The capability checks your hasHsaEligibility and prioritizes HSA contributions due to their triple tax advantage.
08
What inputs do I need for wealth projection?
For project_wealth_growth, you will need your annual contribution amount, years until retirement, expected return rate, and a breakdown of how much to allocate to each account.

Explore

More in Finance

Connect US 401k & IRA Optimizer to Claude, Cursor, ChatGPT & more

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

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

Project wealth growth

Calculate tax savings

Determine optimal sequence

What teams actually run

Optimizing Contribution Order

Tax Savings Verification

Retirement Projections

Bracket Arbitrage

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

US 401k & IRA Optimizer Connector

Claude Desktop

Individual Investors

Financial Planners

Tax Strategists

What is tax arbitrage in retirement planning?

Which accounts does this MCP optimize?

Can I use this with Claude?

How does it determine the best contribution order?

Does this MCP provide actual investment advice?

How does the optimizer decide which account to fund first?

Can I use this for HSA planning?

What inputs do I need for wealth projection?

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