For over 3 years, we have considered creation of new V2 API Keys to be unsupported, as noted within our V2 API documentation. The portal at 'constantcontact.mashery.com' has now been retired & creation of V2 API Keys is no longer possible. For any new development, please utilize our V3 API.
While this is an initial step, no timeline has yet been determined for full retirement of our V2 API. Further steps towards deprecation will be communicated when they are determined. Presently, existing applications can continue to utilize our V2 API.
Aarron G.
API Support Engineer
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