For each coin pair, there will always be a minimum amount required to process a transaction. This minimum amount can vary and will be different for each pair.
You can check minimum payment amount with our status page by selecting the exact coin pair you want or use this endpoint from our API.
Besides, our status page allow you to check current status of exact payment or payout.
At the bottom of this page you can also check our supported tokens, current status for each of them and minimum payment amount for mono-currency payment (e.g. btc-btc).
What happened if my customer will send less than minimum amount
If your customer sends less than the minimum amount required for a payment, the transaction will receive a failed status. In most cases, such transactions cannot be refunded. Please reach out to our support team to determine if it's possible to refund the exact payment.