RAG on WordPress

Do you have any idea how to connect Pinecone API to WordPress? 

I have this code to test:

// Function to get embeddings from OpenAI for a given text input
function get_openai_embedding($text) {
$OPENAI_API_KEY = "sk-ylA0VK_etc"; // Your OpenAI API key
$endpoint = 'https://api.openai.com/v1/embeddings';

// Make a POST request to the OpenAI API to get the embedding using the 'text-embedding-3-small' model
$response = wp_remote_post($endpoint, [
'headers' => [
'Content-Type' => 'application/json',
'Authorization' => 'Bearer ' . $OPENAI_API_KEY
],
'body' => json_encode([
'input' => $text,
'model' => 'text-embedding-3-small' // Adjust the model based on your requirements
]),
'timeout' => 60
]);

// Handle any errors in the response
if (is_wp_error($response)) {
return $response;
}

// Parse the body of the response and decode the JSON data
$body = wp_remote_retrieve_body($response);
$data = json_decode($body, true);

// Check if the data contains a valid embedding and return it
if (isset($data['data'][0]['embedding'])) {
return $data['data'][0]['embedding'];
} else {
return new WP_Error('openai_error', 'Invalid response structure from OpenAI API');
}
}

// Function to query Pinecone for relevant vectors
function query_pinecone($query) {
$PINECONE_API_KEY = "f572-etc"; // Your Pinecone API key
$PINECONE_HOST = "https://nameindex-hx1dgf3.svc.aped-4627-b74a.pinecone.io/query"; // your Pinecone Host URL

// Get the embedding for the query from OpenAI
$embedding = get_openai_embedding($query);

if (is_wp_error($embedding)) {
return new WP_Error('pinecone_error', 'Error getting embedding: ' . $embedding->get_error_message());
}

// Make a POST request to the Pinecone API
$response = wp_remote_post($PINECONE_HOST, [
'headers' => [
'Content-Type' => 'application/json',
'Authorization' => 'Bearer ' . $PINECONE_API_KEY
],
'body' => json_encode([
'vector' => $embedding,
'topK' => 5, // Retrieve the top 5 closest vectors
'includeValues' => true, // Include vector values in the response
'includeMetadata' => true // Include metadata in the response
]),
'timeout' => 60 // Set the timeout for the request
]);

// Check if the request returned an error
if (is_wp_error($response)) {
return new WP_Error('pinecone_error', 'Error in Pinecone request: ' . $response->get_error_message() . '<br><pre>' . print_r($response, true) . '</pre>');
}

// Retrieve the full response for detailed debugging
$body = wp_remote_retrieve_body($response);
$data = json_decode($body, true);

// Log and return the full response body for debugging
error_log(print_r($body, true));

if (isset($data['matches'])) {
return $data;
} else {
// If no matches or invalid response, return the entire response for debugging
return new WP_Error('pinecone_error', 'Invalid response from Pinecone: ' . print_r($body, true));
}
}

// Shortcode function to display Pinecone results and all errors
function pinecone_shortcode() {
$query = 'Ce servicii ofera Perla Senior?';

// Call the function to query Pinecone
$response = query_pinecone($query);

// Handle errors or display the result
if (is_wp_error($response)) {
return 'Error: ' . $response->get_error_message() . '<br><strong>Debug Info:</strong><pre>' . print_r($response, true) . '</pre>';
} else {
// Output the Pinecone result (formatted for better readability)
return '<strong>Pinecone Response:</strong><pre>' . esc_html(print_r($response, true)) . '</pre>';
}
}

// Register the shortcode
add_shortcode('pinecone_response', 'pinecone_shortcode');

And I got all the time this error displayed on the WordPress page:

Error: Invalid response from Pinecone: Unauthorized
Debug Info:

WP_Error Object
(
    [errors] => Array
        (
            [pinecone_error] => Array
                (
                    [0] => Invalid response from Pinecone: Unauthorized
                )

        )

    [error_data] => Array
        (
        )

    [additional_data:protected] => Array
        (
        )

)