BillingDryRun

curl --request GET \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run \
  --header 'x-iw-jwt-token: <TOKEN>'

const options = {method: 'GET', headers: {'x-iw-jwt-token': '<TOKEN>'}};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run"

headers = {"x-iw-jwt-token": "<TOKEN>"}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run', [
  'headers' => [
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Get,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run")
  .get()
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run"

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")

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

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

	fmt.Println(string(body))

}

Dart mit dem Package iw_erp_api

import 'package:iw_erp_api/clients/billing_dry_run_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';

IwApiState().host = 'eure-instanz.iw-erp.de';
IwApiState().currentJwtApiToken = '<TOKEN>';

final result = await BillingDryRunController.getAll();
if (result.success) {
  print(result.data);
}

curl --request POST \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run \
  --header 'content-type: application/json' \
  --header 'x-iw-jwt-token: <TOKEN>' \
  --data '
{
  "data": {
    "billing_payment_profile": {
      "deleted": true
    },
    "billing_date": "2026-10-15T09:30:00+02:00",
    "deleted": true
  }
}
'

const options = {
  method: 'POST',
  headers: {'x-iw-jwt-token': '<TOKEN>', 'content-type': 'application/json'},
  body: JSON.stringify({
    data: {
      billing_payment_profile: {deleted: true},
      billing_date: '2026-10-15T09:30:00+02:00',
      deleted: true
    }
  })
};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run"

payload = { "data": {
    "billing_payment_profile": { "deleted": True },
    "billing_date": "2026-10-15T09:30:00+02:00",
    "deleted": True
  } }
headers = {
  "x-iw-jwt-token": "<TOKEN>",
  "content-type": "application/json"
}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run', [
  'body' => '{"data":{"billing_payment_profile":{"deleted":true},"billing_date":"2026-10-15T09:30:00+02:00","deleted":true}}',
  'headers' => [
    'content-type' => 'application/json',
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Post,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
  Content = new StringContent("{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}")
  {
    Headers =
    {
      ContentType = new MediaTypeHeaderValue("application/json")
    }
  }
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}");
Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run")
  .post(body)
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .addHeader("content-type", "application/json")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run"

	payload := strings.NewReader("{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}")

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")
	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))

}

Dart mit dem Package iw_erp_api

import 'package:iw_erp_api/clients/billing_dry_run_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';
import 'package:iw_erp_api/model/billing_dry_run.dart';

IwApiState().host = 'eure-instanz.iw-erp.de';
IwApiState().currentJwtApiToken = '<TOKEN>';

final result = await BillingDryRunController.post(BillingDryRun.fromJson({
  "billing_payment_profile": {
    "deleted": true
  },
  "billing_date": "2026-10-15T09:30:00+02:00",
  "deleted": true
}));
if (result.success) {
  print(result.data);
}

curl --request GET \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42 \
  --header 'x-iw-jwt-token: <TOKEN>'

const options = {method: 'GET', headers: {'x-iw-jwt-token': '<TOKEN>'}};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

headers = {"x-iw-jwt-token": "<TOKEN>"}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', [
  'headers' => [
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Get,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42")
  .get()
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")

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

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

	fmt.Println(string(body))

}

Dart mit dem Package iw_erp_api

import 'package:iw_erp_api/clients/billing_dry_run_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';

IwApiState().host = 'eure-instanz.iw-erp.de';
IwApiState().currentJwtApiToken = '<TOKEN>';

final result = await BillingDryRunController.get('42');
if (result.success) {
  print(result.data);
}

curl --request PUT \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42 \
  --header 'content-type: application/json' \
  --header 'x-iw-jwt-token: <TOKEN>' \
  --data '
{
  "data": {
    "billing_payment_profile": {
      "deleted": true
    },
    "billing_date": "2026-10-15T09:30:00+02:00",
    "deleted": true
  }
}
'

const options = {
  method: 'PUT',
  headers: {'x-iw-jwt-token': '<TOKEN>', 'content-type': 'application/json'},
  body: JSON.stringify({
    data: {
      billing_payment_profile: {deleted: true},
      billing_date: '2026-10-15T09:30:00+02:00',
      deleted: true
    }
  })
};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

payload = { "data": {
    "billing_payment_profile": { "deleted": True },
    "billing_date": "2026-10-15T09:30:00+02:00",
    "deleted": True
  } }
headers = {
  "x-iw-jwt-token": "<TOKEN>",
  "content-type": "application/json"
}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('PUT', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', [
  'body' => '{"data":{"billing_payment_profile":{"deleted":true},"billing_date":"2026-10-15T09:30:00+02:00","deleted":true}}',
  'headers' => [
    'content-type' => 'application/json',
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Put,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
  Content = new StringContent("{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}")
  {
    Headers =
    {
      ContentType = new MediaTypeHeaderValue("application/json")
    }
  }
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}");
Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42")
  .put(body)
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .addHeader("content-type", "application/json")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

	payload := strings.NewReader("{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}")

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")
	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))

}

Dart mit dem Package iw_erp_api

import 'package:iw_erp_api/clients/billing_dry_run_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';
import 'package:iw_erp_api/model/billing_dry_run.dart';

IwApiState().host = 'eure-instanz.iw-erp.de';
IwApiState().currentJwtApiToken = '<TOKEN>';

final result = await BillingDryRunController.put(BillingDryRun.fromJson({
  "billing_payment_profile": {
    "deleted": true
  },
  "billing_date": "2026-10-15T09:30:00+02:00",
  "deleted": true
}));
if (result.success) {
  print(result.data);
}

curl --request PATCH \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42 \
  --header 'content-type: application/json' \
  --header 'x-iw-jwt-token: <TOKEN>' \
  --data '
{
  "data": {
    "billing_payment_profile": {
      "deleted": true
    },
    "billing_date": "2026-10-15T09:30:00+02:00",
    "deleted": true
  }
}
'

const options = {
  method: 'PATCH',
  headers: {'x-iw-jwt-token': '<TOKEN>', 'content-type': 'application/json'},
  body: JSON.stringify({
    data: {
      billing_payment_profile: {deleted: true},
      billing_date: '2026-10-15T09:30:00+02:00',
      deleted: true
    }
  })
};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

payload = { "data": {
    "billing_payment_profile": { "deleted": True },
    "billing_date": "2026-10-15T09:30:00+02:00",
    "deleted": True
  } }
headers = {
  "x-iw-jwt-token": "<TOKEN>",
  "content-type": "application/json"
}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('PATCH', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', [
  'body' => '{"data":{"billing_payment_profile":{"deleted":true},"billing_date":"2026-10-15T09:30:00+02:00","deleted":true}}',
  'headers' => [
    'content-type' => 'application/json',
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Patch,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
  Content = new StringContent("{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}")
  {
    Headers =
    {
      ContentType = new MediaTypeHeaderValue("application/json")
    }
  }
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}");
Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42")
  .patch(body)
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .addHeader("content-type", "application/json")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

	payload := strings.NewReader("{\"data\":{\"billing_payment_profile\":{\"deleted\":true},\"billing_date\":\"2026-10-15T09:30:00+02:00\",\"deleted\":true}}")

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")
	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))

}

Dart mit package:http (kein Controller im Package iw_erp_api)

import 'dart:convert';
import 'package:http/http.dart' as http;

final response = await http.patch(
  Uri.parse('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42'),
  headers: {'x-iw-jwt-token': '<TOKEN>', 'content-type': 'application/json'},
  body: jsonEncode({
    "data": {
      "billing_payment_profile": {
        "deleted": true
      },
      "billing_date": "2026-10-15T09:30:00+02:00",
      "deleted": true
    }
  }),
);
print(response.body);

curl --request DELETE \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42 \
  --header 'x-iw-jwt-token: <TOKEN>'

const options = {method: 'DELETE', headers: {'x-iw-jwt-token': '<TOKEN>'}};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

headers = {"x-iw-jwt-token": "<TOKEN>"}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('DELETE', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42', [
  'headers' => [
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Delete,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42")
  .delete(null)
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42"

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")

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

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

	fmt.Println(string(body))

}

Dart mit dem Package iw_erp_api

import 'package:iw_erp_api/clients/billing_dry_run_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';

IwApiState().host = 'eure-instanz.iw-erp.de';
IwApiState().currentJwtApiToken = '<TOKEN>';

final result = await BillingDryRunController.delete('42');
if (result.success) {
  print(result.data);
}

curl --request GET \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log \
  --header 'x-iw-jwt-token: <TOKEN>'

const options = {method: 'GET', headers: {'x-iw-jwt-token': '<TOKEN>'}};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log"

headers = {"x-iw-jwt-token": "<TOKEN>"}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log', [
  'headers' => [
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Get,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log")
  .get()
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log"

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")

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

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

	fmt.Println(string(body))

}

Dart mit package:http (kein Controller im Package iw_erp_api)

import 'package:http/http.dart' as http;

final response = await http.get(
  Uri.parse('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run/42/log'),
  headers: {'x-iw-jwt-token': '<TOKEN>'},
);
print(response.body);

curl --request GET \
  --url https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item \
  --header 'x-iw-jwt-token: <TOKEN>'

const options = {method: 'GET', headers: {'x-iw-jwt-token': '<TOKEN>'}};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item"

headers = {"x-iw-jwt-token": "<TOKEN>"}

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

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item', [
  'headers' => [
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Get,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item")
  .get()
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billing_dry_run_item"

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

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")

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

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

	fmt.Println(string(body))

}

Dart mit dem Package iw_erp_api

import 'package:iw_erp_api/clients/billing_dry_run_item_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';

IwApiState().host = 'eure-instanz.iw-erp.de';
IwApiState().currentJwtApiToken = '<TOKEN>';

final result = await BillingDryRunItemController.getAll();
if (result.success) {
  print(result.data);
}