{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/fastforex/main/json-schema/currency.json",
  "title": "Currency",
  "description": "Three-letter ISO 4217 currency code",
  "type": "string",
  "pattern": "[A-Z]{3}"
}