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.
Melissa made a name for itself building contact data quality and identity verification services. The company has taken its next with the introduction of a single portal for various API access to its services. Melissa Developer provides access to business identification and location services.