MCP server

Quarterly Tax Calculator

io.github.al157/quarterlytax-mcp

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

US federal + state quarterly estimated tax estimates, SE tax, and quarterly payment due dates.

Working at last checkOfficial: al157.xyz's GitHub account (al157)About 488 tokens per request once connected2 tools

https://mcp.quarterlytax.al157.xyz/mcp

At a glance

Type: MCP server
Publisher: al157.xyz (verified by the MCP Registry)
Status: Working at last check
Tools: 2
Token cost: About 488 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http quarterlytax-mcp https://mcp.quarterlytax.al157.xyz/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.quarterlytax-mcp]
url = "https://mcp.quarterlytax.al157.xyz/mcp"

Gemini CLI

{"mcpServers":{"quarterlytax-mcp":{"httpUrl":"https://mcp.quarterlytax.al157.xyz/mcp"}}}

Cursor

{"mcpServers":{"quarterlytax-mcp":{"url":"https://mcp.quarterlytax.al157.xyz/mcp"}}}

VS Code

{"servers":{"quarterlytax-mcp":{"type":"http","url":"https://mcp.quarterlytax.al157.xyz/mcp"}}}

Antigravity

agy mcp add quarterlytax-mcp https://mcp.quarterlytax.al157.xyz/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"quarterlytax-mcp","server_url":"https://mcp.quarterlytax.al157.xyz/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"quarterlytax-mcp","server_url":"https://mcp.quarterlytax.al157.xyz/mcp"}

estimateQuarterlyTax ~354 tokens
Estimate US federal + state quarterly estimated tax payments for a self-employed person. Given annual Schedule C net profit, filing status, two-letter US state code, tax year, and whether the §199A QBI deduction applies, returns annual federal income+SE tax, rough state income tax, SE tax, combined
getPaymentCalendar ~134 tokens
Return the 4 federal quarterly estimated tax payment due dates for a tax year (Apr/Jun/Sep 15 and Jan 15 of the following year, rolled forward past weekends and IRS holidays to the real deadline), plus a deep link to the site. Read-only.

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