One API to look up U.S. federal GSA per-diem (travel lodging + M&IE) and HUD Fair Market Rent / Small Area FMR (rent by bedroom, with voucher payment-standard bands) for any ZIP code — joined in a single call. FY2026, public-domain data, clean JSON. Built for travel-nurse stipend, relocation/HR, and real-estate/Section-8 tools. Unofficial; not affiliated with GSA or HUD.

A globally usable mortgage and loan calculator supporting multiple currencies. Covers monthly repayments, full amortisation schedules, affordability reverse-calculation, early repayment savings, side-by-side comparison, total cost of ownership, APR, debt-to-income ratio, stamp duty estimates, refinance break-even, balloon payments, interest-only periods, loan consolidation, and biweekly payment options. Pure maths — no external data sources. Pass any currency code (USD, GBP, EUR, ZAR, AUD, etc.) for localised display.

Accurately calculates income taxes, including federal, state, and social security taxes, showing net income.

Trust our Reliable Reliable NF-e XML Validator API for consistent and accurate validation of your NF-e XML documents to streamline your business processes.

Capture detailed US property tax information effortlessly with our API, designed to streamline your property management and investment analysis.

Streamline your XML validation process with our Efficient Efficient NF-e XML Validator API, saving you time while guaranteeing compliance.

Streamline your XML validation process with our Efficient Efficient NF-e XML Validatorr API, saving you time while guaranteeing compliance.

Validate NF-e XML files effortlessly with our Comprehensive Comprehensive NF-e XML Validatorr API, ensuring compliance and accuracy.

Ensure your NF-e XML files are error-free and compliant with the Comprehensive Comprehensive NF-e XML Validator API for seamless integration.

Check income tax brackets and rates in the US, organized by tax year and taxpayer status.

Simplify your tax process with our US Income Tax API, offering reliable estimates and valuable insights.

Income Tax Estimator API that provides fast, clear, and accurate tax calculations, optimizing personal and business financial planning.

Retrieve essential US tax filing information quickly and securely with our API, ensuring your tax returns are accurate and timely.

Calculate your US income tax seamlessly with our intuitive API, ensuring you're always informed of your obligations.

Access comprehensive US tax income data effortlessly with our API, designed for swift retrieval and accuracy.

Seamlessly pull essential earnings calendar data to strengthen your financial analysis and guide smarter investment decisions.

Estimate your US income tax with precision using our US Income Tax Estimator, designed for financial clarity and effective planning.

Check corporate earnings dates, earnings per share, and estimated versus actual revenues of publicly traded companies for financial analysis and strategic decisions.

Quickly assess your debt-to-income ratio with our accurate tool, ensuring your mortgage approval success.

Determine your refinancing break-even point accurately, ensuring you make informed decisions with our intuitive tool.

Calculate income taxes, including social security contributions and state taxes, returning immediate and accurate results.

Seamlessly capture earnings schedules with our API, ensuring you never miss crucial corporate financial updates.

Estimate annual taxes, providing a detailed breakdown of tax liabilities and an accurate calculation of after-tax income.

Optimizes tax calculations, helping you understand your tax obligations and accurately visualize your net income.

Calculates income taxes, federal and state tax refunds, and social security, along with net income and effective tax rate.