FreeToolHub for Grok
io.github.cavan1977/freetoolhub
44 calculators for AI agents: US tax, finance, business + an MCP engineering & security suite.
client:Grok
transport:streamable-http
tools:44
Install FreeToolHub in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"freetoolhub": {
"type": "http",
"url": "https://freetoolhub.org/api/mcp"
}
}
}Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs
What Grok can do once it is connected
- calculate_se_tax
- calculate_freelancer_tax
- calculate_1099k_tax
- calculate_capital_gains_tax
- compare_w2_vs_1099
- get_sales_tax_rate
- calculate_payroll_tax
- calculate_estate_tax
- calculate_hsa_fsa_savings
- calculate_quarterly_tax
- check_economic_nexus
- calculate_tariff
- calculate_compound_interest
- calculate_mortgage
- compare_401k_vs_roth
- calculate_car_loan
- calculate_rental_roi
- calculate_student_loan
- calculate_roi
- calculate_life_insurance
- calculate_rental_affordability
- calculate_home_equity
- calculate_break_even
- compare_llc_cost