Stop building date logic from scratch. BizCal API gives you production-ready business calendar endpoints so you can ship features faster. Handling business day calculations, SLA deadlines, holiday-aware scheduling, fiscal years, and working hours across 15 countries is hard. Timezone math, regional holiday variations, DST transitions — BizCal handles it al

Stop reimplementing financial math. FinCalc API gives developers 8 production-ready REST endpoints: Amortization, Mortgage, Compound Interest, ROI, NPV, IRR, Break-Even, and Depreciation. Returns structured JSON. Inputs as query params. Stateless - no data stored. Sub-50ms responses. Free tier: 50 calls/day. Paid plans from $9.99/mo.