{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "OpenAccessResponse",
  "description": "Open Access (no-API-key) response from open.er-api.com.",
  "type": "object",
  "properties": {
    "result": {
      "type": "string",
      "description": "Status indicator."
    },
    "provider": {
      "type": "string",
      "format": "uri",
      "description": "Provider attribution URL."
    },
    "documentation": {
      "type": "string",
      "format": "uri",
      "description": "Link to API documentation."
    },
    "terms_of_use": {
      "type": "string",
      "format": "uri",
      "description": "Link to terms of use."
    },
    "time_last_update_unix": {
      "type": "integer",
      "description": "Last update Unix timestamp."
    },
    "time_last_update_utc": {
      "type": "string",
      "description": "Last update in UTC."
    },
    "time_next_update_unix": {
      "type": "integer",
      "description": "Next update Unix timestamp."
    },
    "time_next_update_utc": {
      "type": "string",
      "description": "Next update in UTC."
    },
    "time_eol_unix": {
      "type": "integer",
      "description": "End of life timestamp for response data (0 if not applicable)."
    },
    "base_code": {
      "type": "string",
      "description": "Base currency code."
    },
    "rates": {
      "type": "object",
      "description": "Mapping of ISO 4217 currency codes to exchange rates from base currency.",
      "additionalProperties": {"type": "number"}
    }
  },
  "required": ["result", "base_code", "rates"]
}