Yes, you could trigger actions and methods using XMLRPC (Webservices), just be sure to pass the corresponding parameters to the method or action method. For example:

#Using direct XMLRPC using xmlrpclib

    oerp_common = xmlrpclib.ServerProxy('{}/xmlrpc/2/common'.format(url))
    for d in dbs:
        password = dbs[d].get('admin_pass','admin')
        uid = oerp_common.authenticate(db, 'admin', password, {})
        oerp_models = xmlrpclib.ServerProxy('{}/xmlrpc/2/object'.format(url))
        action = oerp_models.execute_kw(db, uid, password,'ir.module.module', 'update_list',[])

#this is using Zato ESB for Odoo:

with self.outgoing.odoo.get('solt-open').conn.client() as zoe:
    voucher_pool = zoe.get_model('account.voucher')
    voucher_pool.button_proforma_voucher([voucher_id], context=ctx)result = voucher_pool.onchange_journal([],journal_id[0], [], False, partner_info ['id'], False, float(vals.get('monto_pago')), 'receipt', invoice_info['company_id'][0], context={'invoice_id': invoice_info['id']})