This PHP SDK is for generating SendGrid X-SMTPAPI headers. SendGrid is a cloud-based platform for sending and managing email, and generating email analytics. Composer is recommended for installation of the SDK. After installing and configuring the SDK to send email via SMTP, use the provided code snippets to configure headers like categories, substitutions, or filters.
Our API directory now includes 221 marketing APIs. The newest is the Front Door Daily Deals API. The most popular, in terms of mashups, is the SendGrid API. We list 10 SendGrid mashups. Below you'll find some more stats from the directory, including the entire list of marketing APIs.