About Amortization Schedule
Row-by-row loan amortization schedules: monthly or daily accrual, extra principal, PMI, biweekly
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://amortize.gumballtools.com/api/mcpclaude mcp add --transport http com-gumballtools-amortize https://amortize.gumballtools.com/api/mcp{"mcpServers":{"com-gumballtools-amortize":{"type":"http","url":"https://amortize.gumballtools.com/api/mcp"}}}Open in Cursor{"servers":{"com-gumballtools-amortize":{"type":"http","url":"https://amortize.gumballtools.com/api/mcp"}}}Open in VS Code{"mcpServers":{"com-gumballtools-amortize":{"type":"http","url":"https://amortize.gumballtools.com/api/mcp"}}}{"mcpServers":{"com-gumballtools-amortize":{"serverUrl":"https://amortize.gumballtools.com/api/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
1| Parameter | Type | Required | Description |
|---|---|---|---|
| pmi | object | No | Models PMI dropping off at 78% (automatic, default) or 80% (requestable) of originalValue. |
| pmi.monthlyAmount | number | Yes | |
| pmi.originalValue | number | Yes | |
| pmi.cancelAtPercent | any | No | |
| principal | number | Yes | The loan amount, > 0. |
| startDate | string | No | YYYY-MM-DD. For daily compounding, supplying this lets the tool read real day counts and leap years off the calendar. |
| termMonths | integer | Yes | The original term in whole months, e.g. 360 for 30 years. |
| compounding | enum | Yes | "monthly": rate/12 per period, the fixed-mortgage norm. "daily": actual per-diem accrual, the HELOC/auto-loan/student-loan convention — requires startDate or dayCountBasis.monthly | daily |
| dayCountBasis | enum | No | Required for daily compounding ONLY when there is no startDate (a hypothetical loan).30/360 | actual/365 | actual/actual |
| extraPrincipal | any | No | A one-off extra payment at a given payment number, or a recurring extra payment from a given payment number onward. |
| paymentOverride | number | No | The actual per-period payment, if different from the textbook one — e.g. a HELOC minimum payment. |
| paymentFrequency | enum | No | "biweekly" pays half the monthly payment every 14 days and requires compounding "daily".monthly | biweekly |
| annualRatePercent | number | Yes | The annual interest rate as a percent, e.g. 6.5 for 6.5%. |
Details
The maintainer has not added details yet. Check the README in the repository.
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