{"ok":true,"result":{"slug":"compound-interest-calculator","name":"Compound Interest Calculator","summary":"Grow a starting amount with compound interest and optional end-of-month contributions; returns the final balance, interest earned, AER and an optional year-by-year table.","description":"See how savings grow with compound interest. Set the rate, compounding frequency and monthly contributions, then view a year-by-year breakdown.","method":"POST","endpoint":"/api/v1/tools/compound-interest-calculator","plan":"free","mcpName":"compound_interest_calculator","input":{"type":"object","additionalProperties":false,"properties":{"principal":{"type":"number","description":"Starting amount, in currency units.","minimum":0},"rate":{"type":"number","description":"Nominal annual interest rate in percent, e.g. 5 for 5%.","minimum":0,"maximum":100},"years":{"type":"integer","description":"Whole years to grow, 1 to 100.","minimum":1,"maximum":100},"frequency":{"type":"string","description":"How often interest compounds.","default":"monthly","enum":["annually","semi-annually","quarterly","monthly","weekly","daily"],"maxLength":200000},"monthlyContribution":{"type":"number","description":"Amount added at the end of every month.","default":0,"minimum":0},"breakdown":{"type":"boolean","description":"Include the year-by-year rows (paid in, interest, balance).","default":false}},"required":["principal","rate","years"]},"example":{"principal":10000,"rate":5,"years":10,"frequency":"monthly","monthlyContribution":200},"randomOutput":false,"network":false,"docs":"https://pithlab.com/developers/tools/compound-interest-calculator","page":"https://pithlab.com/tools/compound-interest-calculator"}}