https://squareup.com/i/40456CBBSquare Up is now offering to process $1,000 in credit card sales without fees (both swiped and key-ed in transaction fees will be waived) for new Square customers.
You will receive free processing on up to $1,000 (total, not per month)in credit card transactions for the first 180 days. Afterwards, you pay the standard 2.75% per swipe for all major credit cards. 3.5% + $0.15 for manually entered transactions.