Ask your agent “How much is 500 EUR in JPY right now?” and watch it fail. It either invents a rate that looks plausible and is wrong, or it tells you it can’t access live data. Neither is useful when a user is waiting on the answer.The fix is small. Give the agent a tool that fetches the rate for itself. This post walks through building that tool with the ExchangeRatesData API…
Accurate historical exchange rate data is an essential component for modern applications in 2026. Whether you’re building financial dashboards, reconciling international payments, normalizing multi-currency SaaS revenue, or running large-scale analytics, choosing the right…
