Official MCP RegistryListed
FreeToolHub
44 calculators for AI agents: US tax, finance, business + an MCP engineering & security suite.
First seen 2 Oct 2026. Evidence as of 3 Oct 2026.
50
Tools
From an anonymous probe
1
Source listings
Each with its own history
0
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| advise_tool_portfolio | Too many MCP tools makes agents pick the wrong one. Given your tool list and usage, get keep / merge / remove recommendations to get under the 10–15 tool guideline. | Not declared |
| audit_mcp_server_security | Audit an MCP server against the OWASP MCP Top 10. Reports authentication, path traversal, command injection, secret exposure and supply-chain risk with a concrete remediation list. | Not declared |
| calculate_1099k_tax | Estimate tax on 1099-K income (reselling, gig work). SE tax, QBI, quarterly 1040-ES. Uses latest CDN data. | Not declared |
| calculate_break_even | Break-even point: units to sell to cover fixed costs. Contribution margin, target profit analysis. | Not declared |
| 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. | Not declared |
| calculate_car_loan | Monthly car payment, total interest, amortization. Includes sales tax, trade-in, down payment. Uses latest CDN sales tax rates. | Not declared |
| calculate_compound_interest | Compound interest with monthly contributions. Returns final balance, total interest, inflation-adjusted value. Uses latest CDN inflation rate. | Not declared |
| calculate_dropship_profit | True dropshipping profit after product cost, platform fees, payment processing, ad spend. Uses latest CDN payment processor fees. | Not declared |
| calculate_estate_tax | Calculate federal estate tax. 2026 exemption $13.61M, 40% rate. Includes marital deduction. | Not declared |
| calculate_freelancer_pricing | Turn hourly rate into project quote with overhead, profit margin, milestone splits. | Not declared |
| calculate_freelancer_tax | Complete freelancer tax: SE tax, QBI deduction, federal + state income tax. Returns quarterly payment. Uses latest CDN data. | Not declared |
| calculate_github_actions_cost | Estimate a GitHub Actions monthly bill using the January 2026 runner rates (Linux $0.006/min, Windows $0.010, macOS $0.062), accounting for plan allowances. Also reports what the same workload cost before the price cut. | Not declared |
| calculate_home_equity | Calculate home equity, max borrowable amount (HELOC), and monthly payments. LTV limits included. | Not declared |
| calculate_hsa_fsa_savings | Calculate tax savings from HSA and FSA contributions. Federal + FICA + state tax savings. Latest CDN limits. | Not declared |
| calculate_income_tax | US income tax for 2026: federal tax bracket by bracket, state tax, marginal vs effective rate. Uses latest IRS brackets from CDN data. | Not declared |
| calculate_life_insurance | Calculate life insurance needs using DIME method: Debt, Income, Mortgage, Education. | Not declared |
| calculate_loan | Any fixed-rate loan: monthly payment, total interest, payoff time, and interest saved by extra monthly payments. | Not declared |
| calculate_margin | Gross margin AND markup for the same deal, plus reverse pricing from a target margin or markup and the real margin cost of a discount. | Not declared |
| calculate_mortgage | Monthly mortgage payment (P&I) + property tax, insurance, PMI. Full PITI breakdown. Uses latest CDN mortgage rates for defaults. | Not declared |
| calculate_pay_raise | What a raise is actually worth after tax. Runs the real brackets before and after, so bracket crossings are handled — not a flat marginal rate applied to the raise. | Not declared |
| calculate_payroll_tax | Calculate paycheck deductions: federal tax, Social Security, Medicare, state tax. All 50 states. Latest CDN data. | Not declared |
| calculate_quarterly_tax | Calculate quarterly estimated tax payments (Form 1040-ES). SE tax + income tax divided by 4. Latest CDN data. | Not declared |
| calculate_rental_affordability | How much rent can you afford? 30% rule, DTI ratio, comfortable rent range. | Not declared |
| calculate_rental_roi | Rental property ROI: cap rate, cash-on-cash return, NOI, annual cash flow. Includes vacancy and management. | Not declared |
| calculate_reseller_profit | Compare real profit across reselling platforms (eBay, Poshmark, Mercari, etc.) after fees. Uses latest CDN platform fee data. | Not declared |
| calculate_retirement | Retirement projection in today's dollars: projected nest egg, sustainable income at your withdrawal rate, gap, and the monthly contribution that closes it. | Not declared |
| calculate_roi | ROI, ROAS, net profit, CPA, CPC for marketing campaigns. Facebook, Google, TikTok ad analysis. | Not declared |
| calculate_se_tax | Calculate US self-employment tax (15.3%), QBI deduction, quarterly payments. Uses latest IRS brackets from CDN data. | Not declared |
| calculate_student_loan | Student loan payoff: monthly payment, total interest, months saved with extra payments. | Not declared |
| calculate_tariff | Estimate import duties and landed cost by HS code category. Covers US MFN + Section 301 tariffs. | Not declared |
| calculate_tax_refund | Estimate US tax refund or balance due before filing: tax owed minus withholding minus credits, federal and state. NOT the IRS refund tracker. | Not declared |
| check_economic_nexus | Check which US states you have economic nexus in for sales tax collection. Based on Wayfair ruling. Latest CDN thresholds. | Not declared |
| compare_401k_vs_roth | Compare 401(k) pre-tax vs Roth IRA post-tax. 30-year growth, tax drag, recommendation. Uses latest CDN contribution limits. | Not declared |
| compare_ai_coding_tool_costs | Compare monthly and annual cost of AI coding subscriptions (GitHub Copilot, Cursor, Claude Code/Pro/Max, OpenAI Codex) for a given team size and usage intensity, then compare the winner against pay-as-you-go API pricing for the same workload. Prices verified 2026-09. | Not declared |
| compare_automation_platform_costs | Compare real monthly cost on Zapier (per task) versus Make (per operation) for the same workflow volume, including the counting-model difference that makes the two quotes non-obvious. | Not declared |
| compare_llc_cost | Compare LLC formation and maintenance costs across US states. 5-year total cost. Uses latest CDN LLC state fees data. | Not declared |
| compare_llm_api_costs | Rank 18 LLM models by the real monthly cost of a given workload (input/output tokens per call × calls per month). Reports the cheapest and most expensive option, the cost spread, and which models can actually hold your prompt in their context window. | Not declared |
| 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. | Not declared |
| compress_tool_definitions | Shrink MCP tool descriptions and JSON schemas to cut context cost without changing how agents call them. Returns the compressed definitions plus exact token savings. | Not declared |
| detect_polling_cost_traps | Find the most common hidden cost in no-code automation: using polling where a webhook would do. Quantifies the wasted task/operation quota and the monthly dollars. | Not declared |
| estimate_mcp_context_budget | Estimate how much of an LLM context window your MCP servers consume, and which tool definitions to cut first. Paste your MCP config. Returns per-server token cost, remaining budget, and ranked reduction advice. | Not declared |
| estimate_selfhosted_tco | Compare paying hosted CI overage against running self-hosted runners, including the maintenance hours people forget to cost. Reports the true break-even volume. | Not declared |
| find_tool | Semantic tool router. Given a natural-language intent, return only the most relevant tools from this server so the client can inject 3 schemas instead of 27. This is the "find_tool" meta-tool the MCP optimisation literature calls for. | Not declared |
| generate_mcp_client_config | Generate ready-to-paste MCP server config for Claude Desktop, Cursor, VS Code and Windsurf from one input. Config completeness decides whether developers can install your server at all. | Not declared |
| generate_mcp_server_card | Generate a SEP-1649 MCP Server Card (/.well-known/mcp/server-card.json) so crawlers and registries can discover your server without connecting to it. | Not declared |
| get_sales_tax_rate | Get state sales tax rate for any US state. Returns base state rate + estimated local rate. Latest CDN data. | Not declared |
| plan_context_window_budget | Given a set of MCP servers and their tool counts, show for every model context window (128K, 200K, 1M, 10M) how much of the window the tool definitions consume, how much is left for conversation, and whether the server set fits at all. Answers "how many servers can I attach on model X?". | Not declared |
| plan_mcp_token_budget | Plan and attribute MCP token spend across agents, servers and workflows — something the protocol provides no native support for. Outputs per-dimension cost split and a quota plan. | Not declared |
| score_mcp_server_trust | Score an MCP server A–F on trustworthiness and maintenance health, so you can choose between four servers that all claim to do the same thing. Supply what you know about the server. | Not declared |
| validate_mcp_server_card | Validate an MCP Server Card against SEP-1649 and report every missing or malformed field before you publish it. Checks structure (serverInfo, transport, capabilities, authentication) and format (semver version, http(s) transport URL, capabilities.tools entries), returning a full error and warning list. | Not declared |
Change history
No changes since the first observation. The first snapshot is the baseline.
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | io.github.cavan1977/freetoolhub | 2 Oct 2026 | 3 Oct 2026 | 1 |