Hi,

You can create invoice from code as follows:

Sample Python Code:

move = self.env['account.move'].create({
'move_type': 'in_invoice',
'date': '2017-01-01',
'partner_id': self.partner_a.id,
'invoice_date': fields.Date.from_string('2017-01-01'),
'currency_id': self.currency_data['currency'].id,
'invoice_payment_term_id': self.pay_terms_a.id,
'invoice_line_ids': [
(0, None, {
'name': self.product_line_vals_1['name'],
'product_id': self.product_line_vals_1['product_id'],
'product_uom_id': self.product_line_vals_1['product_uom_id'],
'quantity': self.product_line_vals_1['quantity'],
'price_unit': self.product_line_vals_1['price_unit'],
'tax_ids': self.product_line_vals_1['tax_ids'],
}),
(0, None, {
'name': self.product_line_vals_2['name'],
'product_id': self.product_line_vals_2['product_id'],
'product_uom_id': self.product_line_vals_2['product_uom_id'],
'quantity': self.product_line_vals_2['quantity'],
'price_unit': self.product_line_vals_2['price_unit'],

If you need to create using xmlrpc, change the model name to account.move and change the fields and try.

Thanks