combining two lists

I want to combine 2 different ConstantContact lists into 1. Which API do I use to do that? Any advice would be appreciated. Thanks.

re: Combining two lists...which API?

The easiest way to do this is with the Activities resource.
The Activities resources is used to initiate bulk operations (batch jobs).
The basic flow of your program would be:
1. Use the activies resource to EXPORT_CONTACTS in the Contact List of interest. (You may need to use the Contact Lists resource to determine exactly which list to export).
2. Wait for the Activity (batch job) to complete. You can monitor the status of the batch export you submitted with the Activity Resource.
3. Use the Activities resource to add (SV_ADD) the contacts which you exported from the first Contact List into the destination Contact List.

thanks,

Tom Mignosa, Product Manager, Constant Contact