AccountingType

Accounting4 EndpointsBilling / AccountingType

Returns a list of all AccountingType

GET/api/invoice/accountingtypes

Query parameters

`searchString`string	text to search for in the list
`orderFieldName`string	name of the order field
`orderFieldSort`string	sorting modeAllowed: `DESCASC`
`page`integer	page of the list
`pageSize`integer	number of entries for each page
`withMaxPageNumber`string	returns the number of pages available as a header if this is set

Responses

200Returns a list of all AccountingTypearray<AccountingType>

Show fields (6)

idinteger
Primary key of the accounting type. Internal ID.
namestringrequired
Name of the accounting type, for example course fee.
cancelled_namestring
Name used when an invoice of this type is canceled.
typestringrequired
Type of the accounting type, for example invoice or credit note.
deletedboolean
The accounting type is deleted.
default_expense_categoryExpenseCategory10
Standard-EÜR-Kategorie für diesen Rechnungstyp (für Einnahmen-Mapping)
Show fields (19)
- idinteger
  Primary key of the expense category. Internal ID.
- codestring
  Kurzbezeichnung/Code (z.B. "WAREN", "PERSONAL", "MIETE")
- eur_line_numberinteger
  Zeile in der Anlage EÜR (z.B. 23 für Wareneinkauf)
- eur_line_namestring
  Bezeichnung der EÜR-Zeile (z.B. "Waren, Rohstoffe und Hilfsstoffe")
- category_typestring
  Typ der Kategorie (expense, income, neutral, asset, private)
- default_taxTax
  Standard-Steuersatz für diese Kategorie
- cost_centerCostCenter
  Kostenstelle der Kategorie - bei Vereinen die steuerliche Sphäre. Ein Beleg trägt keine eigene Sphäre; über seine Kategorie bekommt er eine. Die EÜR des wirtschaftlichen Geschäftsbetriebs liest sie (billing_euer_commercial_sphere_only), die automatische Buchung setzt sie auf die Buchungszeilen (billing_accounting_cost_center_from_category).
- is_vat_deductibleboolean
  Ist Vorsteuerabzug möglich?
- is_immediate_deductionboolean
  Ist die Kategorie sofort abzugsfähig? (vs. Abschreibung über mehrere Jahre)
- depreciation_yearsinteger
  Abschreibungsdauer in Jahren (für Anlagevermögen)
- sort_orderinteger
  Sortierreihenfolge
- is_activeboolean
  Ist die Kategorie aktiv/sichtbar?
- colorstring
  Farbe für UI-Darstellung (Hex-Code)
- iconstring
  Icon-Name für UI-Darstellung
- is_systemboolean
  Ist dies eine System-Kategorie? (nicht löschbar)
- deletedboolean
  This property is used to mark an entity as deleted / archived
- namestring
  Name of the entity.
- createdstring (date-time)
  Point in time the entity was created.
- updatedstring (date-time)
  Point in time the entity was last updated.

Request

curl --request GET \
  --url https://your-instance.iw-erp.de/api/invoice/accountingtypes \
  --header 'x-iw-jwt-token: <TOKEN>'

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

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

import requests

url = "https://your-instance.iw-erp.de/api/invoice/accountingtypes"

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://your-instance.iw-erp.de/api/invoice/accountingtypes', [
  '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://your-instance.iw-erp.de/api/invoice/accountingtypes"),
  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://your-instance.iw-erp.de/api/invoice/accountingtypes")
  .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://your-instance.iw-erp.de/api/invoice/accountingtypes"

	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 with the iw_erp_api package

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

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

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

Response 200 application/json

[
  {
    "name": "Beispiel",
    "type": "string",
    "id": 42,
    "cancelled_name": "Beispiel",
    "deleted": true,
    "default_expense_category": {
      "id": 42,
      "eur_line_name": "Beispiel",
      "color": "#3f5efb",
      "name": "Beispiel",
      "code": "string",
      "eur_line_number": 1,
      "category_type": "string",
      "is_vat_deductible": true,
      "is_immediate_deduction": true,
      "depreciation_years": 1
    }
  }
]

Add a new AccountingType

POST/api/invoice/accountingtypes

Request body application/json

dataAccountingType
Show fields (6)
- idinteger
  Primary key of the accounting type. Internal ID.
- namestringrequired
  Name of the accounting type, for example course fee.
- cancelled_namestring
  Name used when an invoice of this type is canceled.
- typestringrequired
  Type of the accounting type, for example invoice or credit note.
- deletedboolean
  The accounting type is deleted.
- default_expense_categoryExpenseCategory10
  Standard-EÜR-Kategorie für diesen Rechnungstyp (für Einnahmen-Mapping)

Responses

200Add a new AccountingTypeAccountingType

Show fields (6)

idinteger
Primary key of the accounting type. Internal ID.
namestringrequired
Name of the accounting type, for example course fee.
cancelled_namestring
Name used when an invoice of this type is canceled.
typestringrequired
Type of the accounting type, for example invoice or credit note.
deletedboolean
The accounting type is deleted.
default_expense_categoryExpenseCategory10
Standard-EÜR-Kategorie für diesen Rechnungstyp (für Einnahmen-Mapping)
Show fields (19)
- idinteger
  Primary key of the expense category. Internal ID.
- codestring
  Kurzbezeichnung/Code (z.B. "WAREN", "PERSONAL", "MIETE")
- eur_line_numberinteger
  Zeile in der Anlage EÜR (z.B. 23 für Wareneinkauf)
- eur_line_namestring
  Bezeichnung der EÜR-Zeile (z.B. "Waren, Rohstoffe und Hilfsstoffe")
- category_typestring
  Typ der Kategorie (expense, income, neutral, asset, private)
- default_taxTax
  Standard-Steuersatz für diese Kategorie
- cost_centerCostCenter
  Kostenstelle der Kategorie - bei Vereinen die steuerliche Sphäre. Ein Beleg trägt keine eigene Sphäre; über seine Kategorie bekommt er eine. Die EÜR des wirtschaftlichen Geschäftsbetriebs liest sie (billing_euer_commercial_sphere_only), die automatische Buchung setzt sie auf die Buchungszeilen (billing_accounting_cost_center_from_category).
- is_vat_deductibleboolean
  Ist Vorsteuerabzug möglich?
- is_immediate_deductionboolean
  Ist die Kategorie sofort abzugsfähig? (vs. Abschreibung über mehrere Jahre)
- depreciation_yearsinteger
  Abschreibungsdauer in Jahren (für Anlagevermögen)
- sort_orderinteger
  Sortierreihenfolge
- is_activeboolean
  Ist die Kategorie aktiv/sichtbar?
- colorstring
  Farbe für UI-Darstellung (Hex-Code)
- iconstring
  Icon-Name für UI-Darstellung
- is_systemboolean
  Ist dies eine System-Kategorie? (nicht löschbar)
- deletedboolean
  This property is used to mark an entity as deleted / archived
- namestring
  Name of the entity.
- createdstring (date-time)
  Point in time the entity was created.
- updatedstring (date-time)
  Point in time the entity was last updated.

Request

curl --request POST \
  --url https://your-instance.iw-erp.de/api/invoice/accountingtypes \
  --header 'content-type: application/json' \
  --header 'x-iw-jwt-token: <TOKEN>' \
  --data '
{
  "data": {
    "name": "Beispiel",
    "type": "string",
    "id": 42,
    "cancelled_name": "Beispiel",
    "deleted": true,
    "default_expense_category": {
      "id": 42,
      "eur_line_name": "Beispiel",
      "color": "#3f5efb",
      "name": "Beispiel",
      "code": "string",
      "eur_line_number": 1
    }
  }
}
'

const options = {
  method: 'POST',
  headers: {'x-iw-jwt-token': '<TOKEN>', 'content-type': 'application/json'},
  body: JSON.stringify({
    data: {
      name: 'Beispiel',
      type: 'string',
      id: 42,
      cancelled_name: 'Beispiel',
      deleted: true,
      default_expense_category: {
        id: 42,
        eur_line_name: 'Beispiel',
        color: '#3f5efb',
        name: 'Beispiel',
        code: 'string',
        eur_line_number: 1
      }
    }
  })
};

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

import requests

url = "https://your-instance.iw-erp.de/api/invoice/accountingtypes"

payload = { "data": {
    "name": "Beispiel",
    "type": "string",
    "id": 42,
    "cancelled_name": "Beispiel",
    "deleted": True,
    "default_expense_category": {
      "id": 42,
      "eur_line_name": "Beispiel",
      "color": "#3f5efb",
      "name": "Beispiel",
      "code": "string",
      "eur_line_number": 1
    }
  } }
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://your-instance.iw-erp.de/api/invoice/accountingtypes', [
  'body' => '{"data":{"name":"Beispiel","type":"string","id":42,"cancelled_name":"Beispiel","deleted":true,"default_expense_category":{"id":42,"eur_line_name":"Beispiel","color":"#3f5efb","name":"Beispiel","code":"string","eur_line_number":1}}}',
  '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://your-instance.iw-erp.de/api/invoice/accountingtypes"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
  Content = new StringContent("{\"data\":{\"name\":\"Beispiel\",\"type\":\"string\",\"id\":42,\"cancelled_name\":\"Beispiel\",\"deleted\":true,\"default_expense_category\":{\"id\":42,\"eur_line_name\":\"Beispiel\",\"color\":\"#3f5efb\",\"name\":\"Beispiel\",\"code\":\"string\",\"eur_line_number\":1}}}")
  {
    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\":{\"name\":\"Beispiel\",\"type\":\"string\",\"id\":42,\"cancelled_name\":\"Beispiel\",\"deleted\":true,\"default_expense_category\":{\"id\":42,\"eur_line_name\":\"Beispiel\",\"color\":\"#3f5efb\",\"name\":\"Beispiel\",\"code\":\"string\",\"eur_line_number\":1}}}");
Request request = new Request.Builder()
  .url("https://your-instance.iw-erp.de/api/invoice/accountingtypes")
  .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://your-instance.iw-erp.de/api/invoice/accountingtypes"

	payload := strings.NewReader("{\"data\":{\"name\":\"Beispiel\",\"type\":\"string\",\"id\":42,\"cancelled_name\":\"Beispiel\",\"deleted\":true,\"default_expense_category\":{\"id\":42,\"eur_line_name\":\"Beispiel\",\"color\":\"#3f5efb\",\"name\":\"Beispiel\",\"code\":\"string\",\"eur_line_number\":1}}}")

	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 with the iw_erp_api package

import 'package:iw_erp_api/clients/invoice_accounting_type_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';
import 'package:iw_erp_api/model/invoice_accounting_type.dart';

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

final result = await InvoiceAccountingTypeController.post(InvoiceAccountingType.fromJson({
  "name": "Beispiel",
  "type": "string",
  "id": 42,
  "cancelled_name": "Beispiel",
  "deleted": true,
  "default_expense_category": {
    "id": 42,
    "eur_line_name": "Beispiel",
    "color": "#3f5efb",
    "name": "Beispiel",
    "code": "string",
    "eur_line_number": 1
  }
}));
if (result.success) {
  print(result.data);
}

Response 200 application/json

{
  "name": "Beispiel",
  "type": "string",
  "id": 42,
  "cancelled_name": "Beispiel",
  "deleted": true,
  "default_expense_category": {
    "id": 42,
    "eur_line_name": "Beispiel",
    "color": "#3f5efb",
    "name": "Beispiel",
    "code": "string",
    "eur_line_number": 1,
    "category_type": "string",
    "default_tax": {
      "name": "Beispiel",
      "id": 42,
      "value": 1.5,
      "deleted": true,
      "global_default": true,
      "datev_tax_key": 1
    },
    "cost_center": {
      "display_name": "Beispiel",
      "id": 42,
      "name": "Beispiel",
      "number": "string",
      "sphere": "string",
      "is_system": true,
      "is_active": true,
      "deleted": true,
      "created": "2026-10-15T09:30:00+02:00",
      "updated": "2026-10-15T09:30:00+02:00"
    },
    "is_vat_deductible": true
  }
}

Get a single AccountingType

GET/api/invoice/accountingtypes/{identifier}

Path parameters

identifierrequiredstring

Responses

200Get a single AccountingTypeAccountingType

Show fields (6)

idinteger
Primary key of the accounting type. Internal ID.
namestringrequired
Name of the accounting type, for example course fee.
cancelled_namestring
Name used when an invoice of this type is canceled.
typestringrequired
Type of the accounting type, for example invoice or credit note.
deletedboolean
The accounting type is deleted.
default_expense_categoryExpenseCategory10
Standard-EÜR-Kategorie für diesen Rechnungstyp (für Einnahmen-Mapping)
Show fields (19)
- idinteger
  Primary key of the expense category. Internal ID.
- codestring
  Kurzbezeichnung/Code (z.B. "WAREN", "PERSONAL", "MIETE")
- eur_line_numberinteger
  Zeile in der Anlage EÜR (z.B. 23 für Wareneinkauf)
- eur_line_namestring
  Bezeichnung der EÜR-Zeile (z.B. "Waren, Rohstoffe und Hilfsstoffe")
- category_typestring
  Typ der Kategorie (expense, income, neutral, asset, private)
- default_taxTax
  Standard-Steuersatz für diese Kategorie
- cost_centerCostCenter
  Kostenstelle der Kategorie - bei Vereinen die steuerliche Sphäre. Ein Beleg trägt keine eigene Sphäre; über seine Kategorie bekommt er eine. Die EÜR des wirtschaftlichen Geschäftsbetriebs liest sie (billing_euer_commercial_sphere_only), die automatische Buchung setzt sie auf die Buchungszeilen (billing_accounting_cost_center_from_category).
- is_vat_deductibleboolean
  Ist Vorsteuerabzug möglich?
- is_immediate_deductionboolean
  Ist die Kategorie sofort abzugsfähig? (vs. Abschreibung über mehrere Jahre)
- depreciation_yearsinteger
  Abschreibungsdauer in Jahren (für Anlagevermögen)
- sort_orderinteger
  Sortierreihenfolge
- is_activeboolean
  Ist die Kategorie aktiv/sichtbar?
- colorstring
  Farbe für UI-Darstellung (Hex-Code)
- iconstring
  Icon-Name für UI-Darstellung
- is_systemboolean
  Ist dies eine System-Kategorie? (nicht löschbar)
- deletedboolean
  This property is used to mark an entity as deleted / archived
- namestring
  Name of the entity.
- createdstring (date-time)
  Point in time the entity was created.
- updatedstring (date-time)
  Point in time the entity was last updated.

Request

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

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

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

import requests

url = "https://your-instance.iw-erp.de/api/invoice/accountingtypes/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://your-instance.iw-erp.de/api/invoice/accountingtypes/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://your-instance.iw-erp.de/api/invoice/accountingtypes/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://your-instance.iw-erp.de/api/invoice/accountingtypes/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://your-instance.iw-erp.de/api/invoice/accountingtypes/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 with the iw_erp_api package

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

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

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

Response 200 application/json

{
  "name": "Beispiel",
  "type": "string",
  "id": 42,
  "cancelled_name": "Beispiel",
  "deleted": true,
  "default_expense_category": {
    "id": 42,
    "eur_line_name": "Beispiel",
    "color": "#3f5efb",
    "name": "Beispiel",
    "code": "string",
    "eur_line_number": 1,
    "category_type": "string",
    "default_tax": {
      "name": "Beispiel",
      "id": 42,
      "value": 1.5,
      "deleted": true,
      "global_default": true,
      "datev_tax_key": 1
    },
    "cost_center": {
      "display_name": "Beispiel",
      "id": 42,
      "name": "Beispiel",
      "number": "string",
      "sphere": "string",
      "is_system": true,
      "is_active": true,
      "deleted": true,
      "created": "2026-10-15T09:30:00+02:00",
      "updated": "2026-10-15T09:30:00+02:00"
    },
    "is_vat_deductible": true
  }
}

Update an AccountingType

PUT/api/invoice/accountingtypes/{identifier}

Path parameters

identifierrequiredstring

Request body application/json

dataAccountingType
Show fields (6)
- idinteger
  Primary key of the accounting type. Internal ID.
- namestringrequired
  Name of the accounting type, for example course fee.
- cancelled_namestring
  Name used when an invoice of this type is canceled.
- typestringrequired
  Type of the accounting type, for example invoice or credit note.
- deletedboolean
  The accounting type is deleted.
- default_expense_categoryExpenseCategory10
  Standard-EÜR-Kategorie für diesen Rechnungstyp (für Einnahmen-Mapping)

Responses

200Update an AccountingTypeAccountingType

Show fields (6)

idinteger
Primary key of the accounting type. Internal ID.
namestringrequired
Name of the accounting type, for example course fee.
cancelled_namestring
Name used when an invoice of this type is canceled.
typestringrequired
Type of the accounting type, for example invoice or credit note.
deletedboolean
The accounting type is deleted.
default_expense_categoryExpenseCategory10
Standard-EÜR-Kategorie für diesen Rechnungstyp (für Einnahmen-Mapping)
Show fields (19)
- idinteger
  Primary key of the expense category. Internal ID.
- codestring
  Kurzbezeichnung/Code (z.B. "WAREN", "PERSONAL", "MIETE")
- eur_line_numberinteger
  Zeile in der Anlage EÜR (z.B. 23 für Wareneinkauf)
- eur_line_namestring
  Bezeichnung der EÜR-Zeile (z.B. "Waren, Rohstoffe und Hilfsstoffe")
- category_typestring
  Typ der Kategorie (expense, income, neutral, asset, private)
- default_taxTax
  Standard-Steuersatz für diese Kategorie
- cost_centerCostCenter
  Kostenstelle der Kategorie - bei Vereinen die steuerliche Sphäre. Ein Beleg trägt keine eigene Sphäre; über seine Kategorie bekommt er eine. Die EÜR des wirtschaftlichen Geschäftsbetriebs liest sie (billing_euer_commercial_sphere_only), die automatische Buchung setzt sie auf die Buchungszeilen (billing_accounting_cost_center_from_category).
- is_vat_deductibleboolean
  Ist Vorsteuerabzug möglich?
- is_immediate_deductionboolean
  Ist die Kategorie sofort abzugsfähig? (vs. Abschreibung über mehrere Jahre)
- depreciation_yearsinteger
  Abschreibungsdauer in Jahren (für Anlagevermögen)
- sort_orderinteger
  Sortierreihenfolge
- is_activeboolean
  Ist die Kategorie aktiv/sichtbar?
- colorstring
  Farbe für UI-Darstellung (Hex-Code)
- iconstring
  Icon-Name für UI-Darstellung
- is_systemboolean
  Ist dies eine System-Kategorie? (nicht löschbar)
- deletedboolean
  This property is used to mark an entity as deleted / archived
- namestring
  Name of the entity.
- createdstring (date-time)
  Point in time the entity was created.
- updatedstring (date-time)
  Point in time the entity was last updated.

Request

curl --request PUT \
  --url https://your-instance.iw-erp.de/api/invoice/accountingtypes/42 \
  --header 'content-type: application/json' \
  --header 'x-iw-jwt-token: <TOKEN>' \
  --data '
{
  "data": {
    "name": "Beispiel",
    "type": "string",
    "id": 42,
    "cancelled_name": "Beispiel",
    "deleted": true,
    "default_expense_category": {
      "id": 42,
      "eur_line_name": "Beispiel",
      "color": "#3f5efb",
      "name": "Beispiel",
      "code": "string",
      "eur_line_number": 1
    }
  }
}
'

const options = {
  method: 'PUT',
  headers: {'x-iw-jwt-token': '<TOKEN>', 'content-type': 'application/json'},
  body: JSON.stringify({
    data: {
      name: 'Beispiel',
      type: 'string',
      id: 42,
      cancelled_name: 'Beispiel',
      deleted: true,
      default_expense_category: {
        id: 42,
        eur_line_name: 'Beispiel',
        color: '#3f5efb',
        name: 'Beispiel',
        code: 'string',
        eur_line_number: 1
      }
    }
  })
};

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

import requests

url = "https://your-instance.iw-erp.de/api/invoice/accountingtypes/42"

payload = { "data": {
    "name": "Beispiel",
    "type": "string",
    "id": 42,
    "cancelled_name": "Beispiel",
    "deleted": True,
    "default_expense_category": {
      "id": 42,
      "eur_line_name": "Beispiel",
      "color": "#3f5efb",
      "name": "Beispiel",
      "code": "string",
      "eur_line_number": 1
    }
  } }
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://your-instance.iw-erp.de/api/invoice/accountingtypes/42', [
  'body' => '{"data":{"name":"Beispiel","type":"string","id":42,"cancelled_name":"Beispiel","deleted":true,"default_expense_category":{"id":42,"eur_line_name":"Beispiel","color":"#3f5efb","name":"Beispiel","code":"string","eur_line_number":1}}}',
  '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://your-instance.iw-erp.de/api/invoice/accountingtypes/42"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
  Content = new StringContent("{\"data\":{\"name\":\"Beispiel\",\"type\":\"string\",\"id\":42,\"cancelled_name\":\"Beispiel\",\"deleted\":true,\"default_expense_category\":{\"id\":42,\"eur_line_name\":\"Beispiel\",\"color\":\"#3f5efb\",\"name\":\"Beispiel\",\"code\":\"string\",\"eur_line_number\":1}}}")
  {
    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\":{\"name\":\"Beispiel\",\"type\":\"string\",\"id\":42,\"cancelled_name\":\"Beispiel\",\"deleted\":true,\"default_expense_category\":{\"id\":42,\"eur_line_name\":\"Beispiel\",\"color\":\"#3f5efb\",\"name\":\"Beispiel\",\"code\":\"string\",\"eur_line_number\":1}}}");
Request request = new Request.Builder()
  .url("https://your-instance.iw-erp.de/api/invoice/accountingtypes/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://your-instance.iw-erp.de/api/invoice/accountingtypes/42"

	payload := strings.NewReader("{\"data\":{\"name\":\"Beispiel\",\"type\":\"string\",\"id\":42,\"cancelled_name\":\"Beispiel\",\"deleted\":true,\"default_expense_category\":{\"id\":42,\"eur_line_name\":\"Beispiel\",\"color\":\"#3f5efb\",\"name\":\"Beispiel\",\"code\":\"string\",\"eur_line_number\":1}}}")

	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 with the iw_erp_api package

import 'package:iw_erp_api/clients/invoice_accounting_type_controller.dart';
import 'package:iw_erp_api/logic/iw_api_state.dart';
import 'package:iw_erp_api/model/invoice_accounting_type.dart';

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

final result = await InvoiceAccountingTypeController.put(InvoiceAccountingType.fromJson({
  "name": "Beispiel",
  "type": "string",
  "id": 42,
  "cancelled_name": "Beispiel",
  "deleted": true,
  "default_expense_category": {
    "id": 42,
    "eur_line_name": "Beispiel",
    "color": "#3f5efb",
    "name": "Beispiel",
    "code": "string",
    "eur_line_number": 1
  }
}));
if (result.success) {
  print(result.data);
}

Response 200 application/json

{
  "name": "Beispiel",
  "type": "string",
  "id": 42,
  "cancelled_name": "Beispiel",
  "deleted": true,
  "default_expense_category": {
    "id": 42,
    "eur_line_name": "Beispiel",
    "color": "#3f5efb",
    "name": "Beispiel",
    "code": "string",
    "eur_line_number": 1,
    "category_type": "string",
    "default_tax": {
      "name": "Beispiel",
      "id": 42,
      "value": 1.5,
      "deleted": true,
      "global_default": true,
      "datev_tax_key": 1
    },
    "cost_center": {
      "display_name": "Beispiel",
      "id": 42,
      "name": "Beispiel",
      "number": "string",
      "sphere": "string",
      "is_system": true,
      "is_active": true,
      "deleted": true,
      "created": "2026-10-15T09:30:00+02:00",
      "updated": "2026-10-15T09:30:00+02:00"
    },
    "is_vat_deductible": true
  }
}