Smart Clerk Questions

So we have a bank account with a main checking account and multiple business credit cards in the same bank account.

So does a checking account and two credit cards for the same business in the same bank account count as 3 bank accounts on your limit?

What does the API access allow? Is there documentation we can read somewhere?

In a response lower on the page you stated there is no limit to the number of businesses allowed for tier 2 and 3. How many businesses are allowed for tier 1 please? Is it just one business?

It says 75 invoices per month tier 1, but if I don't have an invoice for a particular expense is there the option to manually enter that expense instead?