Hello,
Hope you are doing well.
Before I proceed, I'll assume that you are aware that bitcoin purchase can be done from a limited number of banks in the U.S., some of them are listed below:
1. Bank of America
2. JP Morgan Chase
3. Citigroup
4. Wells Fargo
5. CitiBank
6. Capital One
7. Discover
8. TD Bank
9. PNC Bank
Now, since we are on the same page, I would like to share how I will be achieving the goal for your requirement. First, we need to register with a bitcoin wallet service provider, who can keep track of all the transaction blocks done from your account. Next, we have to integrate that wallet to your ACH to generate an API that will serve your purpose.
Please let me know if you have additional questions – I would be happy to answer them.
Regards,
Abdus