I connect method:crm with Quickbooks and use method:crm API in my php project but I don't know what the fields I can send for each table, can anyone help me?
And are there any way to send an email of the invoice to the customer using the API?
You can see a list of tables and fields if you sign into your Method account and navigate to Account Settings > Tables & Fields.
Unfortunately, you will not be able to send an email through the API.
If you have any other questions feel free to email us at firstname.lastname@example.org or see our API documentation here.