The Tax Numbers MCP server,
connected in one click.
Get the US federal tax numbers right, with the IRS document each one comes from. Connect the official Tax Numbers MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Tax Numbers to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http tax-numbers https://tax.openkrill.app/mcpRun in your terminal, then restart Claude Code.
Tax Numbers · https://tax.openkrill.app/mcp
What your AI can do with Tax Numbers
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “get_tax_parameters”: Use this when the user asks for a published US federal tax figure, for example "what are the 2026 tax brackets for married filing jointly",.”
“Use “get_mileage_rate”: Use this when the user asks for the IRS standard mileage rate on a day, for example "what was the business mileage rate on 15 March 2026", ".”
“Use “tax_deadlines”: Use this when the user asks when a US federal individual tax date falls, for example "when is the 2025 return due", "when is the extension d.”
“Use “estimate_federal_tax”: Use this when the user wants a rough US federal income tax figure, for example "how much federal tax on $90,000 of wages", "estimate my tax.”
How secure is the Tax Numbers MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Tax Numbers holds up.
Official endpoint
Operated by Tax Numbers (openkrill.app) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Tax Numbers adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Tax Numbers
Choose Tax Numbers in the gate directory. No sign-in needed.
Use it anywhere
Tax Numbers's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Tax Numbers exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
get_tax_parameters — Use this when the user asks for a published US federal tax figure, for example "what are the 2026 tax brackets for married filing jointly",
get_mileage_rate — Use this when the user asks for the IRS standard mileage rate on a day, for example "what was the business mileage rate on 15 March 2026", "
tax_deadlines — Use this when the user asks when a US federal individual tax date falls, for example "when is the 2025 return due", "when is the extension d
estimate_federal_tax — Use this when the user wants a rough US federal income tax figure, for example "how much federal tax on $90,000 of wages", "estimate my tax
submit_feedback — Send feedback to the maintainers about a missing tool, broken links, a bug, or stale data. Use this to send feedback, a bug report or a feat
get_feedback_reply — Read the feedback reply for a ticket from submit_feedback. Use this to read the maintainers' reply to feedback you sent with submit_feedback
index_tools — LinkedIn recruiter jobs feedback broken links: search openkrill MCP tools by task. Use this to find a tool for recruiter search, LinkedIn ke
Who runs the Tax Numbers MCP server?
The Tax Numbers MCP server at a glance
https://tax.openkrill.app/mcpQuestions, answered
Is there an official Tax Numbers MCP server?
Yes — Tax Numbers operates its own remote MCP server at tax.openkrill.app. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Tax Numbers to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Tax Numbers in the directory. No account or sign-in is needed. From then on, Tax Numbers's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Tax Numbers runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Tax Numbers MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Tax Numbers in minutes. No credit card required.
Connect more than just Tax Numbers
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Tax Numbers in: Claude · Claude Code · ChatGPT · Cursor · VS Code