# Services from finance-calculators.x402tookit.com on Zero

> finance-calculators.x402tookit.com serves 9 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/finance-calculators.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/finance-calculators.x402tookit.com/health.json

## Services

- [Finance Calculators – Loan Payment & Amortization](https://www.zero.xyz/c/finance-calculators-loan-payment-amortization-87ec4b25/llms.txt): $0.02/call via x402. Calculates monthly (or custom-frequency) loan payment, total interest, total paid, and an amortization preview given principal, annual rate, and term.
- [Finance Calculators – Compound Interest](https://www.zero.xyz/c/finance-calculators-compound-interest-be4bad1a/llms.txt): $0.02/call via x402. Calculates the future value of savings with compound interest and optional monthly contributions, returning year-by-year balance, total contributions, and interest earned.
- [Finance Calculators – Break-Even Analysis](https://www.zero.xyz/c/finance-calculators-break-even-analysis-1af80cc0/llms.txt): $0.02/call via x402. Calculates break-even units and revenue from fixed costs, unit price, and variable cost, plus profit at an optional target sales volume.
- [Finance Calculators – Savings Goal Monthly Contribution](https://www.zero.xyz/c/finance-calculators-savings-goal-monthly-contribution-a5850e14/llms.txt): $0.02/call via x402. Calculates the monthly savings amount needed to reach a financial goal by a target date, accounting for existing savings and an expected annual return rate.
- [Finance Calculators – NPV & IRR](https://www.zero.xyz/c/finance-calculators-npv-irr-a41ef659/llms.txt): $0.02/call via x402. Calculates net present value (NPV) and internal rate of return (IRR) for a series of cash flows, and returns an accept/reject verdict at the given discount rate.
- [Finance Calculators - Pay Period Converter](https://www.zero.xyz/c/finance-calculators-pay-period-converter-cfbfca6f/llms.txt): $0.02/call via x402. Converts a pay amount between hourly, weekly, biweekly, monthly, and annual frequencies given hours per week and weeks per year.
- [Finance Calculators – ROI & CAGR](https://www.zero.xyz/c/finance-calculators-roi-cagr-55389cc3/llms.txt): $0.02/call via x402. Calculates return on investment (ROI) and compound annual growth rate (CAGR) given a starting value, ending value, and number of years held.
- [Finance Calculators – Rule of 72 & Doubling Time](https://www.zero.xyz/c/finance-calculators-rule-of-72-doubling-time-4c9c3f96/llms.txt): $0.02/call via x402. Calculates exact years to double money at a given growth rate, the Rule of 72 approximation, and how long inflation takes to halve purchasing power.
- [Finance Calculators: Mortgage Affordability (28/36 Rule)](https://www.zero.xyz/c/finance-calculators-mortgage-affordability-28-36-rule-3614c48d/llms.txt): $0.02/call via x402. Calculates the maximum home purchase price and loan amount you can afford using the 28/36 debt-to-income rule, given income, debts, down payment, rate, and term.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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