You need to know the local rules. If you enter the USA with a tourist visa or visa waiver (like ESTA), and tell the immigration officer that this is what you’ll

You need to know the local rules. If you enter the USA with a tourist visa or visa waiver (like ESTA), and tell the immigration officer that this is what you’ll be doing in the country, you’ll most likely be sent back. Foreigners need work authorization in the US to earn any kind of income — no matter if it’s paid abroad — unless the work is within the narrow categories of permitted activities under a business visa.