$ curl https://api.treasuryprime.com/ach \
-u "$API_KEY_ID:$API_KEY_VALUE" \
-H "X-Idempotency-Key: $RANDOM_STRING" \
-H 'Content-Type: application/json' \
-d '{
"account_id": "acct_123456",
"amount": "100.00",
"counterparty_id": "cp_098765",
"direction": "credit",
"sec_code": "ccd"
}'