Creating a USD charge on a GBP account:

$ curl https://api.stripe.com/v1/charges \
    -u REDACTED: \
    -d amount=400 \
    -d currency=usd \
    -d card[number]=4242424242424242 \
    -d card[exp_month]=04 \
    -d card[exp_year]=16 \

-d card[cvv]=390 \