Frankfurter, drawn as an interface
Frankfurter returns the latest reference exchange rates published by the European Central Bank: the amount, the base currency, the date the rates were set, and a rates object keyed by currency code.
With US dollars as the base and euros and rupees as the symbols, Imago shows the amount as the headline, the base and the date as facts, and the rates as a short list.
GEThttps://api.frankfurter.dev/v1/latest?base=USD&symbols=EUR,INR
A saved screenshot. The live response is drawn here when scripts run.

Free, with or without a key
Imago is free and open source. Bring your own free Gemini or Groq key, or use none. With no key you get the page above, drawn by rules that know no particular API. A key gets you a designed layout. It stays in your browser and goes only to the provider you chose.