$cpapi=https://{USER}:{PASS}@{SERVER_IP}:2083/3rdparty/installatron/index.cgi?     # cpanel
#$cpapi=https://{USER}:{PASS}@{SERVER_IP}:2087/3rdparty/installatron/index.cgi?    # whm
#$cpapi=https://{USER}:{PASS}@{SERVER_IP}:2222/CMD_PLUGINS/installatron/index.raw? # directadmin

curl -X DELETE $cpapi/installs/1234567890abcdefghij12345/plugins/akismet \
    -H 'Accept: application/json'

{
    "status": 200,
    "result": true,
    "message": "The task is complete.\n",
    "errcode": null,
    "errfield": null,
    "data": {
        "id": "limit-login-attempts-reloaded",
        "activated": false,
        "autoup": "none",
        "version": "2.3.4",
        "name": "Limit Login Attempts Reloaded",
        "description": "Block excessive login attempts and protect your site against brute force attacks. Simple, yet powerful tools to improve site performance.",
        "author": "Limit Login Attempts Reloaded",
        "version_available": "2.3.4"
    }
}

{
    "status": 200,
    "result": true,
    "message": "The task is complete.\n",
    "errcode": null,
    "errfield": null,
    "data": {
        "id": "limit-login-attempts-reloaded",
        "activated": false,
        "autoup": "none",
        "version": "2.3.4",
        "name": "Limit Login Attempts Reloaded",
        "description": "Block excessive login attempts and protect your site against brute force attacks. Simple, yet powerful tools to improve site performance.",
        "author": "Limit Login Attempts Reloaded",
        "version_available": "2.3.4"
    }
}

<?php

$cpapi   = 'https://{USER}:{PASS}@{SERVER_IP}:2083/3rdparty/installatron/index.cgi?';    // cpanel
//$cpapi = 'https://{USER}:{PASS}@{SERVER_IP}:2087/3rdparty/installatron/index.cgi?';    // whm
//$cpapi = 'https://{USER}:{PASS}@{SERVER_IP}:2222/CMD_PLUGINS/installatron/index.raw?'; // directadmin

$ch = curl_init();
curl_setopt_array($ch, [
    CURLOPT_CUSTOMREQUEST => "DELETE",
    CURLOPT_URL => "$cpapi/installs/1234567890abcdefghij12345/plugins/akismet",
    CURLOPT_HTTPHEADER => [
        "Accept: application/json"
    ],
    CURLOPT_RETURNTRANSFER => true
]);
if (( $response = curl_exec($ch) )=== false )
{
    trigger_error(curl_error($ch));
}
curl_close($ch);
var_export(json_decode($response, true));

?>
 

{
    "status": 200,
    "result": true,
    "message": "The task is complete.\n",
    "errcode": null,
    "errfield": null,
    "data": {
        "id": "limit-login-attempts-reloaded",
        "activated": false,
        "autoup": "none",
        "version": "2.3.4",
        "name": "Limit Login Attempts Reloaded",
        "description": "Block excessive login attempts and protect your site against brute force attacks. Simple, yet powerful tools to improve site performance.",
        "author": "Limit Login Attempts Reloaded",
        "version_available": "2.3.4"
    }
}

/usr/local/installatron/installatron \
    --DELETE /installs/1234567890abcdefghij12345/plugins/akismet

{
    "status": 200,
    "result": true,
    "message": "The task is complete.\n",
    "errcode": null,
    "errfield": null,
    "data": {
        "id": "limit-login-attempts-reloaded",
        "activated": false,
        "autoup": "none",
        "version": "2.3.4",
        "name": "Limit Login Attempts Reloaded",
        "description": "Block excessive login attempts and protect your site against brute force attacks. Simple, yet powerful tools to improve site performance.",
        "author": "Limit Login Attempts Reloaded",
        "version_available": "2.3.4"
    }
}

{
    "status": 200,
    "result": true,
    "message": "The task is complete.\n",
    "errcode": null,
    "errfield": null,
    "data": {
        "id": "limit-login-attempts-reloaded",
        "activated": false,
        "autoup": "none",
        "version": "2.3.4",
        "name": "Limit Login Attempts Reloaded",
        "description": "Block excessive login attempts and protect your site against brute force attacks. Simple, yet powerful tools to improve site performance.",
        "author": "Limit Login Attempts Reloaded",
        "version_available": "2.3.4"
    }
}