Can't add user to a group using MailChimp API 3.0

Question

I'm trying to update my code for subscribing new users to my MailChimp newsletter.

I would like it to add the user to a group, so that I can distinguish between users when sending out newsletters. This code, however, subscribes the user but does not add it to any group. What am I doing wrong? I am using the MailChimp API 3.0.

My code:

$apiKey     = 'XXXX';
$list_id    = 'XXXX';
$memberId   = md5(strtolower($data['email']));
$dataCenter = substr($apiKey,strpos($apiKey,'-')+1);

$url = 'https://' . $dataCenter . '.api.mailchimp.com/3.0/lists/' . $list_id . '/members/' . $memberId;

$json = json_encode(array(
    'email_address' => $data['email'],
    'status'        => $data['status'], // "subscribed","unsubscribed","cleaned","pending"
    'merge_fields'  => array(
        'FNAME'         => $data['firstname'],
        'LNAME'         => $data['lastname'],
        'GROUPINGS'     => array(
            0 => array(
                'name'   => 'Interests',
                'groups' => array( $data['tag'] ),
            ),
        ),
    ),
));

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_USERPWD, 'user:' . $apiKey);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, $json);

$result   = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

score 16 · Accepted Answer · answered Aug 02 '16 at 04:26

16

You are passing Interest grouping in the wrong array. you need to pass the interest group id in interests array with value as true.

$json = json_encode(array(
    'email_address' => 'test@example.com',
    'status'        => 'subscribed', 
    'merge_fields'  => array(
        'FNAME'         => 'FirstName',
        'LNAME'         => 'LastName',
     ),
    'interests'     => array( 
        '9143cf3bd1' => true,
        '789cf3bds1' => true
     ),
));

You will get the id of interest groups [9143cf3bd1,789cf3bds1 in above example] of the list by requesting to this URL

/lists/{list_id}/interest-categories

see doc here

If you want to remove the subscriber from the group, you need to set its value to false in your update request.

answered Aug 02 '16 at 04:26

Mûhámmàd Yäsår K

1,492
11
24

Hi Mûhámmàd, My code is: array( 'email_address' => 'test@example.com', 'status' => 'pending', 'merge_fields' => array( 'FNAME' => 'FirstName', 'LNAME' => 'LastName', ), 'interests' => array( '8c4bb7fbfd' => true ), ) But it still doesn't add the user to the interest group. It gives me a 200 header though. – Tobias Christian Jensen Aug 08 '16 at 08:27
Glad to know that @TobiasChristianJensen :) – Mûhámmàd Yäsår K Aug 18 '16 at 12:32
I'm trying the same thing but I'm getting *400 Bad request* error. and message is: Invalid interest ID: '8f14b8ad10'. – Omer Oct 03 '17 at 06:32
Am I adding the ID wrong... I got the `"list_id": "8f14b8ad10",` from this GET request: /lists/{list_id}/interest-categories – Omer Oct 03 '17 at 06:33
Tried recently, looks like `interests` array should not have direct keys, but arrays instead: `'interests' => array( array( '9143cf3bd1' => true), array('789cf3bds1' => true) ),` – Kos Jan 15 '19 at 09:23
@Kos You are wrong. Just tested it. The answer has the correct format. – Towfiq Feb 01 '21 at 17:44

Can't add user to a group using MailChimp API 3.0

1 Answers1