curl --request POST \
  --url https://api.us.cr4ce.com/user/{user_slug}/upload/{field_slug} \
  --header 'Accept: <accept>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "filename": "example.pdf",
  "data": "aGVsbG8gd29ybGQ="
}
'

import requests

url = "https://api.us.cr4ce.com/user/{user_slug}/upload/{field_slug}"

payload = {
    "filename": "example.pdf",
    "data": "aGVsbG8gd29ybGQ="
}
headers = {
    "Accept": "<accept>",
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    Accept: '<accept>',
    'x-api-key': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({filename: 'example.pdf', data: 'aGVsbG8gd29ybGQ='})
};

fetch('https://api.us.cr4ce.com/user/{user_slug}/upload/{field_slug}', 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.us.cr4ce.com/user/{user_slug}/upload/{field_slug}",
  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([
    'filename' => 'example.pdf',
    'data' => 'aGVsbG8gd29ybGQ='
  ]),
  CURLOPT_HTTPHEADER => [
    "Accept: <accept>",
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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.us.cr4ce.com/user/{user_slug}/upload/{field_slug}"

	payload := strings.NewReader("{\n  \"filename\": \"example.pdf\",\n  \"data\": \"aGVsbG8gd29ybGQ=\"\n}")

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

	req.Header.Add("Accept", "<accept>")
	req.Header.Add("x-api-key", "<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.us.cr4ce.com/user/{user_slug}/upload/{field_slug}")
  .header("Accept", "<accept>")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"filename\": \"example.pdf\",\n  \"data\": \"aGVsbG8gd29ybGQ=\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.us.cr4ce.com/user/{user_slug}/upload/{field_slug}")

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

request = Net::HTTP::Post.new(url)
request["Accept"] = '<accept>'
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"filename\": \"example.pdf\",\n  \"data\": \"aGVsbG8gd29ybGQ=\"\n}"

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

{
  "filename": "example.pdf",
  "token": "AbCdEfGhIjKlMnOp",
  "link": "https://api.au.cr4ce.com/file/AbCdEfGhIjKlMnOp"
}

{
  "message": "<string>",
  "status_code": 400
}

{
  "message": "<string>",
  "status_code": 401
}

{
  "message": "<string>",
  "status_code": 403
}

{
  "message": "<string>",
  "status_code": 404
}

{
  "message": "<string>",
  "status_code": 422,
  "errors": {}
}

{
  "message": "<string>",
  "status_code": 429
}

{
  "status": "Maintenance in progress"
}