PHP

<?php

$baseUrl = 'https://api-sandbox.yousign.app/v3';
$apiKey = 'REPLACE_WITH_YOUR_API_KEY';
$pdfDocumentPath = './test.pdf';

$curl = curl_init();

## 1 - Create a Signature Request:
$data = <<<JSON
        {
          "name": "The name of your Signature Request",
          "delivery_mode": "email",
          "timezone": "Europe/Paris"
        }
        JSON;

curl_setopt_array($curl, [
    CURLOPT_URL => sprintf('%s/signature_requests', $baseUrl),
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_POSTFIELDS => $data,
    CURLOPT_HTTPHEADER => [
        sprintf('Authorization: Bearer %s', $apiKey),
        'Content-Type: application/json'
    ],
]);

$initiateSignatureRequestResponse = curl_exec($curl);
$signatureRequest = json_decode($initiateSignatureRequestResponse, true);
$signatureRequestId = $signatureRequest['id'];


## 2 - Add a Document to the Signature Request:
curl_setopt_array(
    $curl,
    [
        CURLOPT_URL => sprintf('%s/signature_requests/%s/documents', $baseUrl, $signatureRequestId),
        CURLOPT_CUSTOMREQUEST => 'POST',
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POSTFIELDS => [
            'file' => new CURLFile($pdfDocumentPath, 'application/pdf'),
            'nature' => 'signable_document',
            'parse_anchors' => 'true'
        ],
        CURLOPT_HTTPHEADER => [
            sprintf('Authorization: Bearer %s', $apiKey),
        ],
    ]);

$documentUploadResponse = curl_exec($curl);
$document = json_decode($documentUploadResponse, true);
$documentId = $document['id'];


## 3 - Add a Signer to the Signature Request:
$data = <<<JSON
        {
          "info": {
            "first_name": "John",
            "last_name": "Doe",
            "email": "[email protected]",
            "phone_number": "+33700000000",
            "locale": "fr"
          },
          "signature_authentication_mode": "no_otp",
          "signature_level": "electronic_signature",
          "fields": [
            {
              "document_id": "{$documentId}",
              "type": "signature",
              "height": 37,
              "width": 85,
              "page": 1,
              "x": 0,
              "y": 0
            }
          ]
        }
        JSON;

curl_setopt_array($curl, [
    CURLOPT_URL => sprintf('%s/signature_requests/%s/signers', $baseUrl, $signatureRequestId),
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_POSTFIELDS => $data,
    CURLOPT_HTTPHEADER => [
        sprintf('Authorization: Bearer %s', $apiKey),
        'Content-Type: application/json'
    ],
]);

$addSignerResponse = curl_exec($curl);


## 4 - Activate the Signature Request:
curl_setopt_array($curl, [
    CURLOPT_URL => sprintf('%s/signature_requests/%s/activate', $baseUrl, $signatureRequestId),
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_HTTPHEADER => [
        sprintf('Authorization: Bearer %s', $apiKey),
        'Content-Type: application/json'
    ],
]);

$activateSignatureRequestResponse = curl_exec($curl);
curl_close($curl);

echo $activateSignatureRequestResponse;