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Home/ Questions/Q 7060615
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Editorial Team
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Editorial Team
Asked: May 28, 20262026-05-28T04:22:26+00:00 2026-05-28T04:22:26+00:00

So I am calling $api->lists(); on an existing account and it returns an array

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So I am calling $api->lists(); on an existing account and it returns an array of mailing lists. When I swap out the API key for one in a new account which has two existing lists, calling the same $api->lists(); returns empty. Why would swapping out the API key break the lists(); and what are some possible solutions.

I am using MCAPI v1.1 and PHP.

$apikey = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-usx';
$api = new MCAPI($apikey);
dpm($api->lists()); // drupal print message

Edit: The solution to this was to swap out v1.1 for v1.3 of the MCAPI. I didn’t really investigate the changes between these versions, but upgrading to v1.3 fixed it for me.

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  1. Editorial Team
    Editorial Team
    2026-05-28T04:22:27+00:00Added an answer on May 28, 2026 at 4:22 am

    The solution to this was to swap out v1.1 for v1.3 of the MCAPI. I didn’t really investigate the changes between these versions, but upgrading to v1.3 fixed it for me.

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