curl --request GET \
  --url https://app.sajn.se/api/v1/custom-fields/{id} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://app.sajn.se/api/v1/custom-fields/{id}"

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://app.sajn.se/api/v1/custom-fields/{id}', 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://app.sajn.se/api/v1/custom-fields/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://app.sajn.se/api/v1/custom-fields/{id}"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://app.sajn.se/api/v1/custom-fields/{id}")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.sajn.se/api/v1/custom-fields/{id}")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "id": "cm4k2x9p10016abcd1234efgh",
  "name": "Startdatum",
  "type": "DOCUMENT",
  "inputType": "TEXT",
  "defaultValue": "2026-11-01",
  "required": true,
  "options": [
    "Heltid"
  ],
  "createdAt": "2026-09-28T09:12:00.000Z",
  "updatedAt": "2026-09-28T09:15:00.000Z"
}

{
  "code": "INVALID_API_VERSION",
  "message": "Unknown API version \"2026-13\". Supported versions: 2026-09, 2026-10.",
  "userMessage": "API-versionen finns inte.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2"
}

{
  "code": "UNAUTHORIZED",
  "message": "Invalid API token",
  "userMessage": "Ogiltig API-nyckel",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2"
}

{
  "code": "INSUFFICIENT_SCOPE",
  "message": "Insufficient OAuth scope: requires documents:read",
  "userMessage": "Applikationen saknar behörighet (scope) för denna åtgärd.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2",
  "requiredScopes": [
    "documents:read"
  ],
  "grantedScopes": [
    "profile:read"
  ]
}

{
  "code": "NOT_FOUND",
  "message": "Custom field not found",
  "userMessage": "Resursen hittades inte.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2",
  "resource": "custom_field"
}

{
  "code": "INVALID_STATE",
  "message": "The resource's current state doesn't allow the operation, such as editing a document that was already sent or downloading a file that isn't produced yet.",
  "userMessage": "Åtgärden är inte möjlig i resursens nuvarande status.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2"
}

{
  "code": "RATE_LIMITED",
  "message": "API rate limit exceeded",
  "userMessage": "För många förfrågningar. Försök igen om en stund.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2"
}

{
  "code": "INTERNAL_ERROR",
  "message": "Internal server error",
  "userMessage": "Något gick fel.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2"
}

{
  "code": "UPSTREAM_UNAVAILABLE",
  "message": "A service the operation depends on, such as an eID provider or a connected integration, failed or is unavailable. Retry with exponential backoff.",
  "userMessage": "En extern tjänst svarar inte just nu. Försök igen om en stund.",
  "requestId": "req_V1StGXR8Z5jdHi6BmyT2"
}