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Connect Us Section 409a Impact Calculator to your AI

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. Keep your equity grants compliant and avoid unexpected tax penalties.

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.

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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 · 4 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-04

4 capabilities in this set.

Part of 4 available through US 409A Impact Calculator.

  1. 01

    Calculate minimum strike

    This capability determines the lowest strike price you can legally set for an option grant.

  2. 02

    Estimate tax penalty

    Use this to calculate the projected financial burden if options are issued below the current Fair Market Value.

  3. 03

    Analyze grant compliance

    This capability performs a full audit of a proposed grant scenario to check it against FMV and option types.

  4. 04

    Lookup exercise rules

    This capability provides the specific regulatory windows and tax implications tied to exercising options.

Real work

What teams actually run

01

Pre-Grant Auditing

Run a check on a new batch of options to ensure they don't fall below the FMV.

02

Tax Risk Assessment

Estimate the specific financial penalty for employees if a grant is non-compliant.

03

Exercise Planning

Check the regulatory rules and tax implications before an employee exercises their options.

04

Compliance Verification

Verify that current strike prices align with the most recent Fair Market Value updates.

Automate a task

Put US 409A Impact 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

US 409A Impact 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 US 409A Impact 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

715ms average. Fast in production.

US 409A Impact Calculator is checked daily against the live service.

Daily averagePeak 1242ms
Oct 3Today
Fastest day
568ms
Slowest day
1242ms
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. 4 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 409A Impact Calculator, so you can see the experience inside your AI.

It does not authenticate your account with US 409A Impact Calculator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

US 409A Impact Calculator Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_7ZkvoXpHa5AkS1CWLLy1OSbvo0tJVPsXFTYKHrXA/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 — US 409A Impact Calculator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "us-section-409a-impact-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_7ZkvoXpHa5AkS1CWLLy1OSbvo0tJVPsXFTYKHrXA/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 409A Impact Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work US 409A Impact Calculator owners hand off.

This MCP is designed for professionals managing equity and tax compliance for US-based companies.

  • 01

    Finance Managers

    They hand off complex tax penalty math and strike price verification to the agent.

  • 02

    Legal Counsel

    They use the agent to audit grant compliance and verify regulatory windows.

  • 03

    Startup Founders

    They use the agent to quickly check if proposed equity offers meet 409A standards.

FAQ

Questions US 409A Impact Calculator owners ask.

  • 01

    What is Section 409A compliance?

    It refers to US tax rules regarding non-qualified deferred compensation, specifically ensuring stock options are issued at fair market value to avoid penalties.

  • 02

    Can this MCP handle both ISO and NSO grants?

    Yes, the analyze_grant_compliance capability evaluates proposed grants against both ISO and NSO types.

  • 03

    How does the capability calculate tax penalties?

    The estimate_tax_penalty capability calculates the financial burden based on the spread between the strike price and the Fair Market Value.

  • 04

    Which AI clients can use this MCP?

    You can use this MCP with any compatible client, including Claude, Cursor, Windsurf, and VS Code.

  • 05

    Do I need to host the MCP myself?

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

  • 06

    How can I find the minimum strike price for a new grant?

    Use the calculate_minimum_strike capability by providing the current Fair Market Value (FMV) and the valuation date.

  • 07

    What happens if I grant options below the FMV?

    Granting below FMV triggers a 20% federal penalty tax plus interest. You can use estimate_tax_penalty to calculate the projected financial impact.

  • 08

    Does this capability cover ISO and NSO differences?

    Yes. The lookup_exercise_rules capability provides specific exercise windows and tax summaries for both ISO and NSO types.

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