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ClaudeChatGPTPerplexityGeminiMicrosoft CopilotRaycastMeta AIGrokZ.aiQwenKimi
DeepSeekMistralCursorVS CodeWindsurfJetBrainsClineLovableVercel AI SDKLangChain

Use US Quarterly Tax Estimator with your AI.

Connect your account once and let the AI you already use work with it, without building another integration. Calculate exact US federal quarterly estimated tax payments and deadlines using Safe Harbor rules.

Included with plan

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

Complete set · 3 capabilities

The complete US Quarterly Tax Estimator capability set.

These are the exact actions your AI can choose when you ask it to work with US Quarterly Tax Estimator.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through US Quarterly Tax Estimator.

  1. 01

    Estimate quarterly payments

    Calculate required US quarterly tax payments

  2. 02

    Evaluate safe harbor compliance

    Check if current tax payments meet Safe Harbor requirements

  3. 03

    Calculate marginal tax bracket

    Calculate the marginal tax rate for a given income

Observed, not estimated

630ms average. Fast in production.

US Quarterly Tax Estimator is checked daily against the live service.

Daily averagePeak 750ms
Aug 20Today
Fastest day
499ms
Slowest day
750ms
14-day trend
Slowing+9%

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 Quarterly Tax Estimator, so you can see the experience inside your AI.

It does not authenticate your account with US Quarterly Tax Estimator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

US Quarterly Tax Estimator Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_qehiiamMpd2GzZXdM8aLWjQwAKKJUu39dVPRg0ZU/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 Quarterly Tax Estimator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "us-quarterly-tax-estimator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_qehiiamMpd2GzZXdM8aLWjQwAKKJUu39dVPRg0ZU/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

FAQ

Questions US Quarterly Tax Estimator owners ask.

  • 01

    How can I find my quarterly payment deadlines?

    Use the estimate_quarterly_payments capability. It returns a list of all four quarterly deadlines along with the specific amount due for each period.

  • 02

    What is the Safe Harbor rule?

    The Safe Harbor rule allows you to avoid underpayment penalties by paying either 90% of your current year's tax or 100% (or 110% for high earners) of your prior year's tax.

  • 03

    Can I check if my current payments are enough to avoid penalties?

    Yes. The evaluate_safe_harbor_compliance capability compares your total paid to date against the required Safe Harbor thresholds.

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