ActiveCampaign is a web based email marketing software that allows you to send permission based mailings to lists of subscribers. In order to use the API, you will need to write an application that can connect to the server where your Email Marketing is located, send a request to it and handle the response it receives from your Email Marketing software.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.