Constant Contact API

Need API for Constant Contact. Preferably have worked with the Constant Contact API. Otherwise, Any API work will be wonderful. All the data is available. Will need to create Database which I will populate with data from Microsoft Access to link to API. All data is available. Will need to create way to execute the API Add/Modify Contacts Add/Modify Lists Add Campaigns Download Statistics - by campaign and by All documentation on the Constant Contact Web Site.