esell.io vs mailboxlayer API

An easiest way to sell your products on social media sites and blogs.

Similar to how Bitly works, esell.io creates a unique link for your products. A simple click lets customers order and pay for their favorite products directly on a seller’s website or social media page like Facebook or Twitter. It is incredibly easy to share the link and sell products.
The esell.io backend is a full-featured eCommerce platform that includes order and product management, package delivery tracking, CRM, analytics, marketing tools, and seamless integration with 3rd party applications.

Free & Simple Email Verification JSON API

Mailboxlayer is a free, simple and powerful JSON API offering instant email address validation & verification via syntax checks, typo and spelling checks, SMTP checks, free and disposable provider filtering, and much more. Its system is REST-based, secured by 256-bit HTTPS encryption, and pursuing the goal of assisting developers and businesses in fighting fraudulent users and increasing success rates of email campaigns.