# Services from finance.openverbs.com on Zero

> finance.openverbs.com serves 6 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.openverbs.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/finance.openverbs.com/health.json

## Services

- [Loan Amortization Calculator](https://www.zero.xyz/c/loan-amortization-calculator-6446f79a/llms.txt): $0.004/call via x402. Computes the level monthly payment, total paid, total interest, and optionally the full month-by-month amortization schedule for a fully-amortizing loan.
- [Future Value Calculator (finance.openverbs.com)](https://www.zero.xyz/c/future-value-calculator-finance-openverbs-com-c2a1bcc1/llms.txt): $0.004/call via x402. Calculates the future value of a present lump sum and/or a level periodic payment (annuity), given a per-period interest rate and number of periods, with support for annuity-due timing.
- [OpenVerbs Finance NPV Calculator](https://www.zero.xyz/c/openverbs-finance-npv-calculator-5f724afd/llms.txt): $0.004/call via x402. Computes the net present value (NPV) of a series of cash flows discounted at a specified per-period rate, with cash flow at index 0 treated as the time-0 outlay.
- [IRR Calculator (Internal Rate of Return)](https://www.zero.xyz/c/irr-calculator-internal-rate-of-return-83c73a2a/llms.txt): $0.004/call via x402. Computes the internal rate of return per period for a series of cash flows using bounded bisection, rejecting flows without sign changes or a bracketable root.
- [Present Value Calculator (finance.openverbs.com)](https://www.zero.xyz/c/present-value-calculator-finance-openverbs-com-865498af/llms.txt): $0.004/call via x402. Computes the present value of a future lump sum and/or a level annuity given a per-period discount rate and number of periods, with support for annuity-due timing.
- [Simple and Compound Interest Calculator](https://www.zero.xyz/c/simple-and-compound-interest-calculator-ea8f8e87/llms.txt): $0.004/call via x402. Calculates the final amount after growing a principal by simple or compound interest over a specified number of years, with configurable compounding frequency.

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

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