curl --request POST \
  --url http://dolphinflashcards.com/api/import-flashcard \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file' \
  --form jwtToken=eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp \
  --form flashcardName=firstCard \
  --form 'flashcardDescription=my first flashcard' \
  --form folder=top-level-parent-name/parent-name-2/parent-name-3 \
  --form 'delimiter=,' \
  --form firstRowOfData=2

import requests

url = "http://dolphinflashcards.com/api/import-flashcard"

files = { "file": ("example-file", open("example-file", "rb")) }
payload = {
    "jwtToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp",
    "flashcardName": "firstCard",
    "flashcardDescription": "my first flashcard",
    "folder": "top-level-parent-name/parent-name-2/parent-name-3",
    "delimiter": ",",
    "firstRowOfData": "2"
}

response = requests.post(url, data=payload, files=files)

print(response.text)

const form = new FormData();
form.append('file', '<string>');
form.append('jwtToken', 'eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp');
form.append('flashcardName', 'firstCard');
form.append('flashcardDescription', 'my first flashcard');
form.append('folder', 'top-level-parent-name/parent-name-2/parent-name-3');
form.append('delimiter', ',');
form.append('firstRowOfData', '2');

const options = {method: 'POST'};

options.body = form;

fetch('http://dolphinflashcards.com/api/import-flashcard', 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 => "http://dolphinflashcards.com/api/import-flashcard",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"jwtToken\"\r\n\r\neyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardName\"\r\n\r\nfirstCard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardDescription\"\r\n\r\nmy first flashcard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"folder\"\r\n\r\ntop-level-parent-name/parent-name-2/parent-name-3\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delimiter\"\r\n\r\n,\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"firstRowOfData\"\r\n\r\n2\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data"
  ],
]);

$response = curl_exec($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 := "http://dolphinflashcards.com/api/import-flashcard"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"jwtToken\"\r\n\r\neyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardName\"\r\n\r\nfirstCard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardDescription\"\r\n\r\nmy first flashcard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"folder\"\r\n\r\ntop-level-parent-name/parent-name-2/parent-name-3\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delimiter\"\r\n\r\n,\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"firstRowOfData\"\r\n\r\n2\r\n-----011000010111000001101001--")

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

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("http://dolphinflashcards.com/api/import-flashcard")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"jwtToken\"\r\n\r\neyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardName\"\r\n\r\nfirstCard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardDescription\"\r\n\r\nmy first flashcard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"folder\"\r\n\r\ntop-level-parent-name/parent-name-2/parent-name-3\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delimiter\"\r\n\r\n,\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"firstRowOfData\"\r\n\r\n2\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://dolphinflashcards.com/api/import-flashcard")

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

request = Net::HTTP::Post.new(url)
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"jwtToken\"\r\n\r\neyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardName\"\r\n\r\nfirstCard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"flashcardDescription\"\r\n\r\nmy first flashcard\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"folder\"\r\n\r\ntop-level-parent-name/parent-name-2/parent-name-3\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delimiter\"\r\n\r\n,\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"firstRowOfData\"\r\n\r\n2\r\n-----011000010111000001101001--"

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

[
  {
    "200": 123,
    "success": true
  }
]

{
  "error": "Flashcard set name already exists"
}