View as Markdown

llms.txt

The API reference isn't available right now

This instance couldn't load its API specification. The reference returns as soon as the specification is readable again.

Back to the API reference

No such operation

This instance documents no operation under that identifier. It may have been renamed, or it may belong to a feature this installation hasn't enabled.

Back to the API reference

This reference may be out of date

This instance couldn't reach its API specification on the last attempt, so this page shows the copy fetched before that. Anything added or changed since then is missing here, and the reference updates itself as soon as the specification is readable again. Last fetched 2026-10-01 06:25 UTC.

API reference Invoicing

Products: Creates a new invoice product.

POST /api/invoicing/products deprecated

Requires: Invoicing.Products, Invoicing.Products.Create, merchant scope.

A `productCode` another of the biller's products already holds (compared case-insensitively) is refused as a validation error on that field, so no two products of one biller share a SKU.

Example request

Every block below sends the same request. Replace {{BASE_URL}} with the address of the API you are calling and {{API_KEY}} with your own key.

The request body is a InvoiceProductCreateDto. See the Request body section below for its fields.

Code sample language

cURL
curl -X POST "{{BASE_URL}}/api/invoicing/products" \
  -H "api-key: {{API_KEY}}" \
  -H "Content-Type: application/json" \
  -d '{
  "name": "",
  "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
}'

PowerShell
$headers = @{
    'api-key' = '{{API_KEY}}'
}

$body = @'
{
  "name": "",
  "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
}
'@

$response = Invoke-RestMethod -Method POST -Uri '{{BASE_URL}}/api/invoicing/products' `
    -Headers $headers -ContentType 'application/json' -Body $body

npm install @winkpg/winkpg-api

TypeScript (SDK)
import { Configuration, InvoicingApi } from '@winkpg/winkpg-api';

const api = new InvoicingApi(new Configuration({
  basePath: '{{BASE_URL}}',
  apiKey: '{{API_KEY}}',
}));

const { data } = await api.invoiceProductCreate({
  "name": "",
  "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
});

TypeScript (raw HTTP)
const response = await fetch('{{BASE_URL}}/api/invoicing/products', {
  method: 'POST',
  headers: {
    "api-key": "{{API_KEY}}",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "name": "",
    "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
  }),
});

const data = await response.json();

dotnet add package WinkPg.Api.Client

C# (SDK)
using WinkPg.Api.Client.Api;
using WinkPg.Api.Client.Client;
using System.Text.Json;

var config = new Configuration { BasePath = "{{BASE_URL}}" };
config.AddApiKey("api-key", "{{API_KEY}}");

var api = new InvoicingApi(config);
var body = JsonSerializer.Deserialize<InvoiceProductCreateDto>("""
    {
      "name": "",
      "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    }
    """);

var result = await api.InvoiceProductCreateAsync(body);

C# (raw HTTP)
using System.Text;

using var http = new HttpClient { BaseAddress = new Uri("{{BASE_URL}}") };

var request = new HttpRequestMessage(new HttpMethod("POST"), "/api/invoicing/products");
request.Headers.Add("api-key", "{{API_KEY}}");

request.Content = new StringContent("""
    {
      "name": "",
      "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    }
    """, Encoding.UTF8, "application/json");

var response = await http.SendAsync(request);
response.EnsureSuccessStatusCode();
var json = await response.Content.ReadAsStringAsync();

pip install winkpg-api

Python (SDK)
import winkpg_api

configuration = winkpg_api.Configuration(host="{{BASE_URL}}")
configuration.api_key["ApiKey"] = "{{API_KEY}}"

with winkpg_api.ApiClient(configuration) as client:
    api = winkpg_api.InvoicingApi(client)
    body = winkpg_api.InvoiceProductCreateDto.from_dict({
      "name": "",
      "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    })
    result = api.invoice_product_create(body)

pip install requests

Python (raw HTTP)
import requests

headers = {
    "api-key": "{{API_KEY}}",
    "Content-Type": "application/json",
}

body = {
  "name": "",
  "billerId": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
}

response = requests.request(
    "POST",
    "{{BASE_URL}}/api/invoicing/products",
    headers=headers,
    json=body,
)
response.raise_for_status()
data = response.json()

Parameters

Name In Type Description
suppressNulls required query boolean If true, omit properties with null values.

Request body

application/json , required

Field Type Description
name required string nullablemax length 200
description required string Conditional: When Description is not empty. Max length: 1000. nullable
productCode required string Optional SKU or product code. Stored trimmed, with its letter case kept. Unique within the biller, compared case-insensitively: a code another of the biller's products already holds is rejected with a validation error naming this field. Leave it empty (or send whitespace, which is stored as no code) for a product without a code; any number of those may exist. Conditional: When ProductCode is not empty. Max length: 50. nullable
imageBlobName required string Bare blob filename of the product image, as returned by the hosted-page image upload endpoint (`POST /api/hostedpaymentpages/images/upload`). Omit or send null to leave the product without an image; an empty string also clears it. Never a URL, a path, or inline image data. nullable
defaultPrice required number (double) min 0
taxCategoryId required string (uuid) Superseded by `defaultTaxRateId`; retained for compatibility, not read. Accepted and stored as sent, and never applied to a line item. nullable
defaultTaxRateId required string (uuid) Optional. The id of one of the biller's active tax rates, applied to an invoice line when this product is picked. Must belong to the same biller as the product; a rate that does not exist, belongs to another biller, or has been deactivated is rejected with a validation error naming this field. Omit or send null for no default. nullable
isActive required boolean nullable
sortOrder required integer (int32) nullable
currency required string Conditional: When Currency is not empty. Max length: 3. nullable
pricingModel required all of PricingModel nullable
allowCustomPrice required boolean nullable
productType required all of ProductType nullable
isTaxable required boolean nullable
taxCode required string Conditional: When TaxCode is not empty. Max length: 50. nullable
unitOfMeasure required string Conditional: When UnitOfMeasure is not empty. Max length: 50. nullable
allowFractionalQuantity required boolean nullable
minimumQuantity required number (double) Conditional: When MinimumQuantity is not null. Must be >= 0. nullable
maximumQuantity required number (double) Conditional: When MaximumQuantity is not null. Must be >= 0. nullable
requiresShipping required boolean nullable
weight required number (double) nullablemin 0max 999999.9999
weightUnit required all of ShippingWeightUnit Required: When Weight is not null. nullable
length required number (double) nullablemin 0max 99999.9999
width required number (double) nullablemin 0max 99999.9999
height required number (double) nullablemin 0max 99999.9999
dimensionUnit required all of ShippingDimensionUnit Required: When Length is not null or Width is not null or Height is not null. nullable
revenueAccount required string Conditional: When RevenueAccount is not empty. Max length: 100. nullable
deferredRevenue required boolean nullable
recognitionRuleId required string (uuid) nullable
tags required array of EntityTag nullable
billerId required string (uuid)
billerType required InvoicePartyType Identifies the type of entity acting as the biller or recipient on an invoice. one of: GatewayOwner, Reseller, Merchant, Customer

This request body has no documented fields.

Responses

200 OK

Body: InvoiceProductDto Each item has these fields.

Field Type Description
id required string (uuid)
creationTime required string (date-time) The date and time when this entity was created.
creatorId required string (uuid) The ID of the user who created this entity. nullable
lastModificationTime required string (date-time) The date and time when this entity was last modified. nullable
lastModifierId required string (uuid) The ID of the user who last modified this entity. nullable
billerId required string (uuid)
billerType required InvoicePartyType Identifies the type of entity acting as the biller or recipient on an invoice. one of: GatewayOwner, Reseller, Merchant, Customer
name required string nullable
description required string nullable
productCode required string nullable
imageBlobName required string Bare blob filename of the product image in the hosted-page image container, or null when the product has no image. Rendered at `{cdn}/hosted-page-imgs/host/{name}`. nullable
defaultPrice required number (double)
taxCategoryId required string (uuid) Superseded by `defaultTaxRateId`; retained for compatibility, not read. nullable
defaultTaxRateId required string (uuid) The biller's tax rate applied to an invoice line when this product is picked, or null when the product carries no default. nullable
isActive required boolean nullable
sortOrder required integer (int32) nullable
currency required string nullable
pricingModel required all of PricingModel nullable
allowCustomPrice required boolean nullable
productType required all of ProductType nullable
isTaxable required boolean nullable
taxCode required string nullable
unitOfMeasure required string nullable
allowFractionalQuantity required boolean nullable
minimumQuantity required number (double) nullable
maximumQuantity required number (double) nullable
requiresShipping required boolean nullable
weight required number (double) nullable
weightUnit required all of ShippingWeightUnit nullable
length required number (double) nullable
width required number (double) nullable
height required number (double) nullable
dimensionUnit required all of ShippingDimensionUnit nullable
revenueAccount required string nullable
deferredRevenue required boolean nullable
recognitionRuleId required string (uuid) nullable
tags required array of EntityTag nullable
archivedAt required string (date-time) nullable
concurrencyStamp required string nullable

This response has no documented body fields.

403 Forbidden

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

401 Unauthorized

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

400 The request is invalid, including a `productCode` already held by another product of the same biller.

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

404 Not Found

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

501 Not Implemented

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

500 Internal Server Error

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

default The request failed. The body carries the standard error envelope: a machine-readable `error.code`, a human-readable `error.message`, and `error.validationErrors` when the failure was a validation rejection. See the error-code reference in this document's description for the values `error.code` can take.

Body: RemoteServiceErrorResponse Each item has these fields.

Field Type Description
error required RemoteServiceErrorInfo

This response has no documented body fields.

429 The request was refused because a rate limit was exceeded. Wait at least the interval `Retry-After` names before retrying, then back off. Limits are tuned per deployment, so read the allowance from the response headers rather than assuming a fixed ceiling.

Body: RateLimitProblemDetails Each item has these fields.

Field Type Description
type required string The problem type identifier. Always the same value: the failure is the status code itself, so there is no sub-type for a caller to branch on. nullable
title required string A short, human-readable summary of the problem type. nullable
status required integer (int32) The HTTP status code, repeated in the body as the problem-details format defines.
detail required string A human-readable explanation of this occurrence of the problem. nullable
retryAfterSeconds required integer (int32) How long to wait before retrying, in whole seconds, carrying the same figure as the `Retry-After` header. Always at least one: a value of zero would invite an immediate retry that is certain to be rejected again.

This response has no documented body fields.

Errors

A failed request returns the platform error envelope. The error reference lists every value error.code can carry and shows the four response shapes.

Codes declared by Invoicing

Authentication

    Reconnecting to the server

    Could not reconnect

    This session has ended

    Attempt 1

    Your work on this page is still here. Retrying keeps it; reloading starts the page again.

    The server no longer holds this page's state, so it has to be loaded again.