automating non voip sms verification

Background - My SEO project requires me to login to client ecommerce websites as a new customer and crawl their site for SEO optimization assignments (Google, Bing, Yahoo). An example would consist of me generating new email (gmail) accounts that requires random unique sms enabled phone number to receive the verification. These verification codes would then be used to authenticate the new email account. This same process is used for my clients ecommerce website. If auto-mated, even better