Php - How to use the Midjourney API in 4 easy steps

Step 1 – Generate a bearer token

Generate a bearer token from your new application.

Step 2 – Start a new thread with Midjourney

You may select an ai_version_code. For example : midjourney.

Send an http POST request to create a new thread.

<?php
$bearer = '<<your_token_here>>';

// CREATE THREAD
// -------------
$url = "https://app.ai-client.com/api/v1/threads";

$headers = [
  'Accept: application/json',
  'Authorization: Bearer '.$bearer
];

$options = [
    'ai_version_code' => 'midjourney'
];

$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => $url,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS => $options,
  CURLOPT_HTTPHEADER => $headers,
  CURLOPT_RETURNTRANSFER => true
));

$response = curl_exec($curl);
$thread = json_decode($response)->data;
curl_close($curl);

print_r($thread);

This will return :

stdClass Object
(
    [guid] => 268e4bc4-89e2-441b-9182-afcd288a325b
    [ai_code] => midjourney
    [ai_version_code] => midjourney
    [title] => New thread with Midjourney
    [created_at] => 2023-06-16T19:55:04.000000Z
    [updated_at] => 2023-06-16T19:55:04.000000Z
)

Step 3 – Create a thread entry to send a message

You may use the thread object to create a new entry with a POST request.

$url = "https://app.ai-client.com/api/v1/threads/" . $thread->guid . "/entry";

$headers = [
  'Accept: application/json',
  'Authorization: Bearer '.$bearer
];

$options = ['type' => 'request', 'command' => 'imagine', 'prompt' => "Cats and dogs with lightsabers --ar 16:9"];

$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => $url,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS => $options,
  CURLOPT_HTTPHEADER => $headers,
  CURLOPT_RETURNTRANSFER => true
));

$response = curl_exec($curl);
$threadEntry = json_decode($response)->data;
curl_close($curl);

print_r($threadEntry);

This will return :

stdClass Object
(
    [guid] => a83317fc-8675-4adf-abfa-d1397d3b7af6
    [thread_guid] => 268e4bc4-89e2-441b-9182-afcd288a325b
    [type] => request
    [error] =>
    [content] => stdClass Object
        (
            [command] => imagine
            [prompt] => Cats and dogs with lightsabers --ar 16:9
        )

    [waiting_response] => 1
    [credits] => 0
    [created_at] => 2023-06-16T19:55:04.000000Z
)

Step 4 – Wait for a response from Midjourney

You must now wait for the AI’s response. The “waiting_response” property of your thread entry informs you of Midjourney’s response.

You may use the thread object to get all the thread entries. Send a GET request. You will see your thread entry of type “request” and the Midjourney thread entry of type “response“.

$url = "https://app.ai-client.com/api/v1/threads/" . $thread->guid . "/entries";

$headers = [
  'Accept: application/json',
  'Authorization: Bearer '.$bearer
];

$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => $url,
  CURLOPT_CUSTOMREQUEST => 'GET',
  CURLOPT_HTTPHEADER => $headers,
  CURLOPT_RETURNTRANSFER => true
));

$response = curl_exec($curl);
$threadEntries = json_decode($response)->data;
curl_close($curl);

print_r($threadEntries);

This will return :