curl --request POST \
  --url https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "document_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "position": 2,
  "label": "<string>",
  "original_filename": "<string>"
}
'

import requests

url = "https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents"

payload = {
    "document_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "position": 2,
    "label": "<string>",
    "original_filename": "<string>"
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    document_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    position: 2,
    label: '<string>',
    original_filename: '<string>'
  })
};

fetch('https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'document_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'position' => 2,
    'label' => '<string>',
    'original_filename' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents"

	payload := strings.NewReader("{\n  \"document_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"position\": 2,\n  \"label\": \"<string>\",\n  \"original_filename\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"document_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"position\": 2,\n  \"label\": \"<string>\",\n  \"original_filename\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.firma.dev/functions/v1/signing-request-api/signing-requests/{id}/documents")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"document_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"position\": 2,\n  \"label\": \"<string>\",\n  \"original_filename\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

{
  "documents": [
    {
      "document_id": null,
      "position": 1,
      "label": null,
      "original_filename": null,
      "page_count": 3,
      "document_url": "https://api.firma.dev/storage/v1/object/sign/signing-request-documents/example.pdf?token=example",
      "document_url_kind": "stored",
      "document_only_hash": null
    }
  ],
  "documents_version": 123,
  "documents_layout_version": 123
}

{
  "error": "<string>",
  "code": "ALREADY_CANCELLED",
  "errors": [
    {
      "message": "<string>"
    }
  ],
  "message": "<string>",
  "details": {}
}

{
  "error": "Unauthorized",
  "message": "Invalid API key"
}

{
  "error": "<string>",
  "code": "ALREADY_CANCELLED",
  "errors": [
    {
      "message": "<string>"
    }
  ],
  "message": "<string>",
  "details": {}
}

{
  "error": "<string>",
  "code": "ALREADY_CANCELLED",
  "errors": [
    {
      "message": "<string>"
    }
  ],
  "message": "<string>",
  "details": {}
}

{
  "error": "<string>",
  "code": "ALREADY_CANCELLED",
  "errors": [
    {
      "message": "<string>"
    }
  ],
  "message": "<string>",
  "details": {}
}

{
  "error": "Rate Limit Exceeded",
  "message": "Too many requests. Please wait before retrying.",
  "details": {
    "retry_after": 45
  }
}

{
  "error": "<string>",
  "code": "<string>",
  "errors": [
    {
      "message": "<string>"
    }
  ],
  "message": "<string>",
  "details": {}
}