Financial Calculator API

Loan, mortgage, compound interest, savings and ROI calculators.

Get your free key → Full API docs

Endpoints

POST /v1/finance/api/v1/loan Loan with amortisation · principal, annualRate, months
POST /v1/finance/api/v1/mortgage Mortgage with extra payments · principal, annualRate, months
POST /v1/finance/api/v1/compound Compound interest · principal, annualRate, years
POST /v1/finance/api/v1/roi Return on investment · initialInvestment, finalValue

Example

curl -X POST "https://api.sprytools.com/v1/finance/api/v1/loan" \
  -H "x-api-key: YOUR_KEY" -H "content-type: application/json" \
  -d '{"principal":10000,"annualRate":5,"months":36}'