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This reference may be out of date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 06:30 UTC.

API reference Merchant Billing

Payment Methods: Gets the merchant's active stored payment method.

GET /api/merchants/{id}/billing/payment-method deprecated

Requires: MerchantBilling.PaymentMethods, merchant scope.

Answers null when none is configured.

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 . See the Request body section below for its fields.

Code sample language

cURL
curl -X GET "{{BASE_URL}}/api/merchants/{id}/billing/payment-method" \
  -H "api-key: {{API_KEY}}"

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

$response = Invoke-RestMethod -Method GET -Uri '{{BASE_URL}}/api/merchants/{id}/billing/payment-method' `
    -Headers $headers

npm install @winkpg/winkpg-api

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

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

const { data } = await api.merchantBillingPaymentMethodGetForMerchant("3fa85f64-5717-4562-b3fc-2c963f66afa6");

TypeScript (raw HTTP)
const response = await fetch('{{BASE_URL}}/api/merchants/{id}/billing/payment-method', {
  method: 'GET',
  headers: {
    "api-key": "{{API_KEY}}",
  },
});

const data = await response.json();

dotnet add package WinkPg.Api.Client

C# (SDK)
using WinkPg.Api.Client.Api;
using WinkPg.Api.Client.Client;

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

var api = new MerchantBillingApi(config);
var result = await api.MerchantBillingPaymentMethodGetForMerchantAsync(Guid.Parse("3fa85f64-5717-4562-b3fc-2c963f66afa6"));

C# (raw HTTP)
using var http = new HttpClient { BaseAddress = new Uri("{{BASE_URL}}") };

var request = new HttpRequestMessage(new HttpMethod("GET"), "/api/merchants/{id}/billing/payment-method");
request.Headers.Add("api-key", "{{API_KEY}}");

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.MerchantBillingApi(client)
    result = api.merchant_billing_payment_method_get_for_merchant("3fa85f64-5717-4562-b3fc-2c963f66afa6")

pip install requests

Python (raw HTTP)
import requests

headers = {
    "api-key": "{{API_KEY}}",
}

response = requests.request(
    "GET",
    "{{BASE_URL}}/api/merchants/{id}/billing/payment-method",
    headers=headers,
)
response.raise_for_status()
data = response.json()

Parameters

Name In Type Description
id required path string (uuid) The billed merchant whose active stored method is requested.
suppressNulls required query boolean If true, omit properties with null values.

Request body

application/json , required

Field Type Description

This request body has no documented fields.

Responses

200 OK

Body: MerchantBillingPaymentMethodDto Each item has these fields.

Field Type Description
id required string (uuid) Stable id for the payment-method row.
resellerId required string (uuid) The reseller that owns the (billed-merchant → token) pairing. nullable
merchantId required string (uuid) The merchant being billed. nullable
collectionMerchantId required string (uuid) The collection merchant under whose vault the token lives. nullable
kind required all of MerchantBillingPaymentMethodKind Funding instrument family. nullable
brand required string Card brand display string (e.g., "Visa"). Null when `kind` is ACH. nullable
last4 required string Last 4 digits of PAN / ACH account number, for display only. nullable
expMonth required integer (int32) Card expiration month (1-12). Null when `kind` is ACH. nullable
expYear required integer (int32) Card expiration year (4-digit). Null when `kind` is ACH. nullable
achAccountType required all of MerchantBillingAchAccountType ACH account type. Null when `kind` is Card. nullable
isActive required boolean True while this is the active payment method for the (reseller, merchant) pair. nullable
deactivatedAt required string (date-time) When the row was deactivated. Null while `isActive` is true. nullable
creationTime required string (date-time) Creation timestamp from `FullAuditedAggregateRoot`.
concurrencyStamp required string Concurrency stamp for optimistic concurrency. 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 Bad Request

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 Merchant Billing

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.