The FreeToolHub MCP server,
connected in one click.
44 calculators for AI agents: US tax, finance, business + an MCP engineering & security suite. Connect the official FreeToolHub 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 FreeToolHub 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 freetoolhub https://freetoolhub.org/api/mcpRun in your terminal, then restart Claude Code.
FreeToolHub · https://freetoolhub.org/api/mcp
What your AI can do with FreeToolHub
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “calculate_se_tax”: Calculate US self-employment tax (15.3%), QBI deduction, quarterly payments. Uses latest IRS brackets from CDN data.”
“Use “calculate_freelancer_tax”: Complete freelancer tax: SE tax, QBI deduction, federal + state income tax. Returns quarterly payment. Uses latest CDN data.”
“Use “calculate_1099k_tax”: Estimate tax on 1099-K income (reselling, gig work). SE tax, QBI, quarterly 1040-ES. Uses latest CDN data.”
“Use “calculate_capital_gains_tax”: US capital gains tax on stock/crypto. Short vs long-term, NIIT 3.8%, state tax. Uses latest CDN LTCG brackets.”
How secure is the FreeToolHub MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how FreeToolHub holds up.
Security grade D
gate scanned 50 tools on Oct 6, 2026. A few things are worth a look before you connect.
- mediumscore_mcp_server_trust: References secrets or data exfiltration
- mediumaudit_mcp_server_security: References secrets or data exfiltration
- mediumaudit_mcp_server_security: Runs arbitrary code or commands
- +1 more in the full report
Official endpoint
Operated by FreeToolHub (freetoolhub.org) 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 FreeToolHub 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 FreeToolHub
Choose FreeToolHub in the gate directory. No sign-in needed.
Use it anywhere
FreeToolHub'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 FreeToolHub exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
calculate_se_tax — Calculate US self-employment tax (15.3%), QBI deduction, quarterly payments. Uses latest IRS brackets from CDN data.
calculate_freelancer_tax — Complete freelancer tax: SE tax, QBI deduction, federal + state income tax. Returns quarterly payment. Uses latest CDN data.
calculate_1099k_tax — Estimate tax on 1099-K income (reselling, gig work). SE tax, QBI, quarterly 1040-ES. Uses latest CDN data.
calculate_capital_gains_tax — US capital gains tax on stock/crypto. Short vs long-term, NIIT 3.8%, state tax. Uses latest CDN LTCG brackets.
compare_w2_vs_1099 — Compare take-home pay: W-2 salary vs 1099 contractor rate. SE tax, FICA, standard deduction, state tax. Latest CDN data.
get_sales_tax_rate — Get state sales tax rate for any US state. Returns base state rate + estimated local rate. Latest CDN data.
calculate_payroll_tax — Calculate paycheck deductions: federal tax, Social Security, Medicare, state tax. All 50 states. Latest CDN data.
calculate_estate_tax — Calculate federal estate tax. 2026 exemption $13.61M, 40% rate. Includes marital deduction.
+ 42 more tools once connected
Who runs the FreeToolHub MCP server?
The FreeToolHub MCP server at a glance
https://freetoolhub.org/api/mcpQuestions, answered
Is there an official FreeToolHub MCP server?
Yes — FreeToolHub operates its own remote MCP server at freetoolhub.org. 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 FreeToolHub to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick FreeToolHub in the directory. No account or sign-in is needed. From then on, FreeToolHub's tools are available in every client you've connected to gate.
Do I need to host anything?
No. FreeToolHub runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the FreeToolHub 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 FreeToolHub in minutes. No credit card required.
Connect more than just FreeToolHub
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up FreeToolHub in: Claude · Claude Code · ChatGPT · Cursor · VS Code