Latest Rates API

Fetch the latest exchange rates for a specified base currency.

Endpoint

GET /latest_rates

Parameters

Parameter	Type	Required	Description
baseCurrency	string	Yes	Base currency code (ISO 4217) - e.g., USD, EUR, GBP
targetCurrencies	string	No	Comma-separated target currencies - e.g., EUR,GBP,JPY. Defaults to all currencies if omitted.

Request Example

curl -X GET "https://api.openfxrates.com/latest_rates?baseCurrency=USD&targetCurrencies=EUR,GBP,JPY" \
  -H "X-API-Key: your-api-key-here"

Response Schema

{
  "status": "SUCCESS",
  "data": {
    "base_currency": "USD",
    "rates": {
      "EUR": 0.861166,
      "GBP": 0.746252,
      "JPY": 158.11890909
    },
    "timestamp": "2026-01-22T11:34:57.294Z",
    "meta_data": {
      "monthly_requests": 100000,
      "remaining_requests": 99998,
      "reset_time": null
    }
  }
}

Response Fields

Field	Type	Description
status	string	Request status (SUCCESS or FAILED)
data	object	Response data container
base_currency	string	The base currency code
rates	object	Exchange rates with currency codes as keys and rates as values
timestamp	string	ISO 8601 timestamp of the rates
meta_data	object	API usage information
meta_data.monthly_requests	number	Total monthly request limit
meta_data.remaining_requests	number	Remaining requests for the month
meta_data.reset_time	string/null	When the limit resets

Status Codes

Status	Description
200	Success - Rates returned
400	Bad Request - Invalid currency code
401	Unauthorized - Invalid or missing API key
429	Too Many Requests - Rate limit exceeded

Examples

Get rates for all currencies

curl -X GET "https://api.openfxrates.com/latest_rates?baseCurrency=USD" \
  -H "X-API-Key: your-api-key"

Get rates for specific currencies

curl -X GET "https://api.openfxrates.com/latest_rates?baseCurrency=EUR&targetCurrencies=USD,GBP,JPY,CHF" \
  -H "X-API-Key: your-api-key"

Rate Limiting

Rate limit information is included in every response under meta_data:

• monthly_requests - Total requests allowed per month
• remaining_requests - Requests remaining this month
• reset_time - When the limit resets (if applicable)

Caching

For optimal performance, cache latest rates for 1-5 minutes depending on your requirements.

See Also

• Historical Rates API - Get historical rates
• Currency Conversion API - Convert amounts between currencies
• List Currencies - Get all supported currencies