API Quiz Creation Issue - "Provided JSON is invalid or does not match the expected format."

Hi Robert,

Thank you for reaching out to us through the community.

If you are looking for the JSON format for posting data to the Brightspace API using PHP, can you check if format below helps

<?php
require 'vendor/autoload.php';

use GuzzleHttp\Client;

$accessToken = 'YOUR_ACCESS_TOKEN';
$orgUnitId = 12345; // Course ID
$baseUrl = 'https://yourinstitution.brightspace.com';

$client = new Client();

$quizData = [
"Name" => "Sample API Quiz",
"IsActive" => true,
"AutoExportToGrades" => false,
"AutoSetGraded" => true,
"AllowHints" => true,
"DisableRightClick" => false,
"PreventMovingBackwards" => false,
"Shuffle" => true,
"QuestionsPerPage" => 5,
"PagingType" => 1,
"DisplayResults" => [
"DisplayAttemptScore" => true,
"DisplayAttemptGrade" => true,
"DisplayAttemptQuestions" => 2,
"DisplayAttemptAnswers" => true,
"DisplayAttemptFeedback" => true,
"DisplayAttemptHint" => true
],
"SubmissionTimeLimit" => [
"IsEnforced" => false,
"TimeLimit" => 0,
"ShowClock" => false
],
"LateSubmissionInfo" => [
"LateSubmissionOption" => 1
],
"AttemptsAllowed" => 1,
"AttemptsAllowedType" => 1,
"RetakeIncorrectOnly" => false,
"Description" => [
"Text" => "<p>This quiz was created via the Brightspace API.</p>",
"Html" => "<p>This quiz was created via the Brightspace API.</p>",
"IsHidden" => false
]
];

try {
$response = $client->request('POST', "$baseUrl/d2l/api/le/1.71/$orgUnitId/quizzes/", [
'headers' => [
'Authorization' => 'Bearer ' . $accessToken,
'Accept' => 'application/json',
'Content-Type' => 'application/json'
],
'json' => $quizData
]);

$data = json_decode($response->getBody(), true);
echo "✅ Quiz created successfully:\n";
print_r($data);

} catch (\GuzzleHttp\Exception\RequestException $e) {
echo "❌ Error creating quiz: " . $e->getMessage() . "\n";
if ($e->hasResponse()) {
$error = json_decode($e->getResponse()->getBody(), true);
print_r($error);
}
}

Thanks,

Sreelakshmi

It would helpful if, instead of your code, what we saw was the details of the actual request — what does the JSON look like that you’re actually sending to the server?