---
title: "PayCo for API only"
description: "Add PayCo to your API-only integration."
url: "https://docs.adyen.com/payment-methods/payco/api-only"
source_url: "https://docs.adyen.com/payment-methods/payco/api-only.md"
canonical: "https://docs.adyen.com/payment-methods/payco/api-only"
last_modified: "2026-05-08T17:09:18+02:00"
language: "en"
---

# PayCo for API only

Add PayCo to your API-only integration.

You can add PayCo to your existing integration. The following instructions show only what you must add to your integration specifically for PayCo.

If an instruction on this page corresponds with a step in the main integration guide, it includes a link to corresponding step of the main integration guide.

## Requirements

| Requirement           | Description                                                                                                                                                                                                                |   |
| --------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | - |
| **Integration type**  | Make sure that you have an existing [API-only integration](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only).                                                                   |   |
| **Redirect handling** | Make sure that your existing integration is set up to [handle the redirect](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only#handle-the-redirect). `action.type`: **redirect**. |   |
| **Setup steps**       | Before you begin, [add PayCo in your Customer Area](/payment-methods/add-payment-methods).                                                                                                                                 |   |

## How it works

1. The shopper selects PayCo as the payment method.
2. The shopper enters their details in the [payment form that you build](#build-your-payment-form).
3. When you make the payment request, you [include additional information about the items that the shopper intends to purchase](#additional-parameters-payments).
4. Your existing integration setup will [handle the redirect](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only#handle-the-redirect).

## Build your payment form

Include PayCo in the list of available payment methods. There are no additional fields that you have to include in your form.

You can [download the logo for PayCo](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%2Bonly\&version=71#downloading-logos) to use in your form.

## Get PayCo as an available payment method

When you make the [/paymentMethods](https://docs.adyen.com/api-explorer/Checkout/latest/post/paymentMethods) to [get available payment methods](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only#get-available-payment-methods), specify the following so that PayCo is included in the response.

| Parameter                                                                                                          | Values  |
| ------------------------------------------------------------------------------------------------------------------ | ------- |
| [countryCode](https://docs.adyen.com/api-explorer/Checkout/latest/post/paymentMethods#request-countryCode)         | **KR**  |
| [amount.currency](https://docs.adyen.com/api-explorer/Checkout/latest/post/paymentMethods#request-amount-currency) | **KRW** |

**Example request for available payment methods**

#### curl

```bash
curl https://checkout-test.adyen.com/v72/paymentMethods \
-H 'x-api-key: ADYEN_API_KEY' \
-H 'idempotency-key: YOUR_IDEMPOTENCY_KEY' \
-H 'content-type: application/json' \
-X POST
-d '{
   "merchantAccount": "ADYEN_MERCHANT_ACCOUNT",
   "countryCode": "KR",
   "amount": {
      "currency": "KRW",
	  "value": 1000
   },
   "shopperLocale": "kr-KR"
}'
```

#### Java

```java
// Adyen Java API Library v40.0.0
import com.adyen.Client;
import com.adyen.enums.Environment;
import com.adyen.model.checkout.*;
import java.time.OffsetDateTime;
import java.util.*;
import com.adyen.model.RequestOptions;
import com.adyen.service.checkout.*;

// For the LIVE environment, also include your liveEndpointUrlPrefix.
Client client = new Client("ADYEN_API_KEY", Environment.TEST);

// Create the request object(s)
Amount amount = new Amount()
  .currency("KRW")
  .value(1000L);

PaymentMethodsRequest paymentMethodsRequest = new PaymentMethodsRequest()
  .amount(amount)
  .merchantAccount("ADYEN_MERCHANT_ACCOUNT")
  .countryCode("KR")
  .shopperLocale("kr-KR");

// Send the request
PaymentsApi service = new PaymentsApi(client);
PaymentMethodsResponse response = service.paymentMethods(paymentMethodsRequest, new RequestOptions().idempotencyKey("UUID"));
```

#### PHP

```php
<?php
// Adyen PHP API Library v28.3.0
use Adyen\Client;
use Adyen\Environment;
use Adyen\Model\Checkout\Amount;
use Adyen\Model\Checkout\PaymentMethodsRequest;
use Adyen\Service\Checkout\PaymentsApi;

$client = new Client();
$client->setXApiKey("ADYEN_API_KEY");
// For the LIVE environment, also include your liveEndpointUrlPrefix.
$client->setEnvironment(Environment::TEST);


// Create the request object(s)
$amount = new Amount();
$amount
  ->setCurrency("KRW")
  ->setValue(1000);

$paymentMethodsRequest = new PaymentMethodsRequest();
$paymentMethodsRequest
  ->setAmount($amount)
  ->setMerchantAccount("ADYEN_MERCHANT_ACCOUNT")
  ->setCountryCode("KR")
  ->setShopperLocale("kr-KR");

$requestOptions['idempotencyKey'] = 'UUID';

// Send the request
$service = new PaymentsApi($client);
$response = $service->paymentMethods($paymentMethodsRequest, $requestOptions);
```

#### C\#

```cs
// Adyen .NET API Library v32.2.1
using Adyen;
using Environment = Adyen.Model.Environment;
using Adyen.Model;
using Adyen.Model.Checkout;
using Adyen.Service.Checkout;

// For the LIVE environment, also include your liveEndpointUrlPrefix.
var config = new Config()
{
    XApiKey = "ADYEN_API_KEY",
    Environment = Environment.Test
};
var client = new Client(config);

// Create the request object(s)
Amount amount = new Amount
{
  Currency = "KRW",
  Value = 1000
};

PaymentMethodsRequest paymentMethodsRequest = new PaymentMethodsRequest
{
  Amount = amount,
  MerchantAccount = "ADYEN_MERCHANT_ACCOUNT",
  CountryCode = "KR",
  ShopperLocale = "kr-KR"
};

// Send the request
var service = new PaymentsService(client);
var response = service.PaymentMethods(paymentMethodsRequest, requestOptions: new RequestOptions { IdempotencyKey = "UUID"});
```

#### NodeJS (JavaScript)

```js
// Adyen Node API Library v30.0.0
const { Client, CheckoutAPI } = require('@adyen/api-library');

// For the LIVE environment, also include your liveEndpointUrlPrefix.
const config = new Config({
  apiKey: "ADYEN_API_KEY",
  environment: EnvironmentEnum.TEST
});

const client = new Client(config);

// Create the request object(s)
const paymentMethodsRequest = {
  merchantAccount: "ADYEN_MERCHANT_ACCOUNT",
  countryCode: "KR",
  amount: {
    currency: "KRW",
    value: 1000
  },
  shopperLocale: "kr-KR"
}

// Send the request
const checkoutAPI = new CheckoutAPI(client);
const response = checkoutAPI.PaymentsApi.paymentMethods(paymentMethodsRequest, { idempotencyKey: "UUID" });
```

#### Go

```go
// Adyen Go API Library v21.1.0
import (
  "context"
  "github.com/adyen/adyen-go-api-library/v21/src/common"
  "github.com/adyen/adyen-go-api-library/v21/src/adyen"
  "github.com/adyen/adyen-go-api-library/v21/src/checkout"
)
// For the LIVE environment, also include your liveEndpointUrlPrefix.
client := adyen.NewClient(&common.Config{
  ApiKey:      "ADYEN_API_KEY",
  Environment: common.TestEnv,
})

// Create the request object(s)
amount := checkout.Amount{
  Currency: "KRW",
  Value: 1000,
}

paymentMethodsRequest := checkout.PaymentMethodsRequest{
  Amount: &amount,
  MerchantAccount: "ADYEN_MERCHANT_ACCOUNT",
  CountryCode: common.PtrString("KR"),
  ShopperLocale: common.PtrString("kr-KR"),
}

// Send the request
service := client.Checkout()
req := service.PaymentsApi.PaymentMethodsInput().IdempotencyKey("UUID").PaymentMethodsRequest(paymentMethodsRequest)
res, httpRes, err := service.PaymentsApi.PaymentMethods(context.Background(), req)
```

#### Python

```py
# Adyen Python API Library v14.0.0
import Adyen

adyen = Adyen.Adyen()
adyen.client.xapikey = "ADYEN_API_KEY"
# For the LIVE environment, also include your liveEndpointUrlPrefix.
adyen.client.platform = "test" # The environment to use library in.

# Create the request object(s)
json_request = {
  "merchantAccount": "ADYEN_MERCHANT_ACCOUNT",
  "countryCode": "KR",
  "amount": {
    "currency": "KRW",
    "value": 1000
  },
  "shopperLocale": "kr-KR"
}

# Send the request
result = adyen.checkout.payments_api.payment_methods(request=json_request, idempotency_key="UUID")
```

#### Ruby

```rb
# Adyen Ruby API Library v11.0.0
require "adyen-ruby-api-library"

adyen = Adyen::Client.new
adyen.api_key = 'ADYEN_API_KEY'
# For the LIVE environment, also include your liveEndpointUrlPrefix.
adyen.env = :test # Set to "live" for live environment

# Create the request object(s)
request_body = {
  :merchantAccount => 'ADYEN_MERCHANT_ACCOUNT',
  :countryCode => 'KR',
  :amount => {
    :currency => 'KRW',
    :value => 1000
  },
  :shopperLocale => 'kr-KR'
}

# Send the request
result = adyen.checkout.payments_api.payment_methods(request_body, headers: { 'Idempotency-Key' => 'UUID' })
```

#### NodeJS (TypeScript)

```ts
// Adyen Node API Library v30.0.0
import { Client, CheckoutAPI, Types } from "@adyen/api-library";

// For the LIVE environment, also include your liveEndpointUrlPrefix.
const config = new Config({
  apiKey: "ADYEN_API_KEY",
  environment: EnvironmentEnum.TEST
});

const client = new Client(config);

// Create the request object(s)
const amount: Types.checkout.Amount = {
  currency: "KRW",
  value: 1000
};

const paymentMethodsRequest: Types.checkout.PaymentMethodsRequest = {
  amount: amount,
  merchantAccount: "ADYEN_MERCHANT_ACCOUNT",
  countryCode: "KR",
  shopperLocale: "kr-KR"
};

// Send the request
const checkoutAPI = new CheckoutAPI(client);
const response = checkoutAPI.PaymentsApi.paymentMethods(paymentMethodsRequest, { idempotencyKey: "UUID" });
```

**Example response with PayCo available**

```json
{
    "paymentMethods": [
        {
            "name": "PayCo",
            "type": "kcp_payco"
        }
    ]
}
```

## Add additional parameters to your /payments request

You do not need to add any additional parameters when you [make a payment](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only#make-a-payment).

**Example payment request for PayCo**

#### curl

```bash
curl https://checkout-test.adyen.com/v72/payments \
-H 'x-API-key: ADYEN_API_KEY' \
-H 'idempotency-key: YOUR_IDEMPOTENCY_KEY' \
-H 'content-type: application/json' \
-X POST
-d '{
  "amount":{
    "currency":"KRW",
    "value":10000
  },
  "paymentMethod": {
      "type": "kcp_payco"
  },
  "reference":"YOUR_ORDER_NUMBER",
  "returnUrl":"https://your-company.com/checkout?shopperOrder=12xy..",
  "merchantAccount":"ADYEN_MERCHANT_ACCOUNT"
}'
```

#### Java

```java
// Adyen Java API Library v40.0.0
import com.adyen.Client;
import com.adyen.enums.Environment;
import com.adyen.model.checkout.*;
import java.time.OffsetDateTime;
import java.util.*;
import com.adyen.model.RequestOptions;
import com.adyen.service.checkout.*;

// For the LIVE environment, also include your liveEndpointUrlPrefix.
Client client = new Client("ADYEN_API_KEY", Environment.TEST);

// Create the request object(s)
Amount amount = new Amount()
  .currency("KRW")
  .value(10000L);

PaymentDetails paymentDetails = new PaymentDetails()
  .type(PaymentDetails.TypeEnum.KCP_PAYCO);

PaymentRequest paymentRequest = new PaymentRequest()
  .reference("YOUR_ORDER_NUMBER")
  .amount(amount)
  .merchantAccount("ADYEN_MERCHANT_ACCOUNT")
  .paymentMethod(new CheckoutPaymentMethod(paymentDetails))
  .returnUrl("https://your-company.com/checkout?shopperOrder=12xy..");

// Send the request
PaymentsApi service = new PaymentsApi(client);
PaymentResponse response = service.payments(paymentRequest, new RequestOptions().idempotencyKey("UUID"));
```

#### PHP

```php
<?php
// Adyen PHP API Library v28.3.0
use Adyen\Client;
use Adyen\Environment;
use Adyen\Model\Checkout\Amount;
use Adyen\Model\Checkout\CheckoutPaymentMethod;
use Adyen\Model\Checkout\PaymentRequest;
use Adyen\Service\Checkout\PaymentsApi;

$client = new Client();
$client->setXApiKey("ADYEN_API_KEY");
// For the LIVE environment, also include your liveEndpointUrlPrefix.
$client->setEnvironment(Environment::TEST);


// Create the request object(s)
$amount = new Amount();
$amount
  ->setCurrency("KRW")
  ->setValue(10000);

$checkoutPaymentMethod = new CheckoutPaymentMethod();
$checkoutPaymentMethod
  ->setType("kcp_payco");

$paymentRequest = new PaymentRequest();
$paymentRequest
  ->setReference("YOUR_ORDER_NUMBER")
  ->setAmount($amount)
  ->setMerchantAccount("ADYEN_MERCHANT_ACCOUNT")
  ->setPaymentMethod($checkoutPaymentMethod)
  ->setReturnUrl("https://your-company.com/checkout?shopperOrder=12xy..");

$requestOptions['idempotencyKey'] = 'UUID';

// Send the request
$service = new PaymentsApi($client);
$response = $service->payments($paymentRequest, $requestOptions);
```

#### C\#

```cs
// Adyen .NET API Library v32.2.1
using Adyen;
using Environment = Adyen.Model.Environment;
using Adyen.Model;
using Adyen.Model.Checkout;
using Adyen.Service.Checkout;

// For the LIVE environment, also include your liveEndpointUrlPrefix.
var config = new Config()
{
    XApiKey = "ADYEN_API_KEY",
    Environment = Environment.Test
};
var client = new Client(config);

// Create the request object(s)
Amount amount = new Amount
{
  Currency = "KRW",
  Value = 10000
};

PaymentDetails paymentDetails = new PaymentDetails
{
  Type = PaymentDetails.TypeEnum.KcpPayco
};

PaymentRequest paymentRequest = new PaymentRequest
{
  Reference = "YOUR_ORDER_NUMBER",
  Amount = amount,
  MerchantAccount = "ADYEN_MERCHANT_ACCOUNT",
  PaymentMethod = new CheckoutPaymentMethod(paymentDetails),
  ReturnUrl = "https://your-company.com/checkout?shopperOrder=12xy.."
};

// Send the request
var service = new PaymentsService(client);
var response = service.Payments(paymentRequest, requestOptions: new RequestOptions { IdempotencyKey = "UUID"});
```

#### NodeJS (JavaScript)

```js
// Adyen Node API Library v30.0.0
const { Client, CheckoutAPI } = require('@adyen/api-library');

// For the LIVE environment, also include your liveEndpointUrlPrefix.
const config = new Config({
  apiKey: "ADYEN_API_KEY",
  environment: EnvironmentEnum.TEST
});

const client = new Client(config);

// Create the request object(s)
const paymentRequest = {
  amount: {
    currency: "KRW",
    value: 10000
  },
  paymentMethod: {
    type: "kcp_payco"
  },
  reference: "YOUR_ORDER_NUMBER",
  returnUrl: "https://your-company.com/checkout?shopperOrder=12xy..",
  merchantAccount: "ADYEN_MERCHANT_ACCOUNT"
}

// Send the request
const checkoutAPI = new CheckoutAPI(client);
const response = checkoutAPI.PaymentsApi.payments(paymentRequest, { idempotencyKey: "UUID" });
```

#### Go

```go
// Adyen Go API Library v21.1.0
import (
  "context"
  "github.com/adyen/adyen-go-api-library/v21/src/common"
  "github.com/adyen/adyen-go-api-library/v21/src/adyen"
  "github.com/adyen/adyen-go-api-library/v21/src/checkout"
)
// For the LIVE environment, also include your liveEndpointUrlPrefix.
client := adyen.NewClient(&common.Config{
  ApiKey:      "ADYEN_API_KEY",
  Environment: common.TestEnv,
})

// Create the request object(s)
amount := checkout.Amount{
  Currency: "KRW",
  Value: 10000,
}

paymentDetails := checkout.PaymentDetails{
  Type: common.PtrString("kcp_payco"),
}

paymentRequest := checkout.PaymentRequest{
  Reference: "YOUR_ORDER_NUMBER",
  Amount: amount,
  MerchantAccount: "ADYEN_MERCHANT_ACCOUNT",
  PaymentMethod: checkout.PaymentDetailsAsCheckoutPaymentMethod(&paymentDetails),
  ReturnUrl: "https://your-company.com/checkout?shopperOrder=12xy..",
}

// Send the request
service := client.Checkout()
req := service.PaymentsApi.PaymentsInput().IdempotencyKey("UUID").PaymentRequest(paymentRequest)
res, httpRes, err := service.PaymentsApi.Payments(context.Background(), req)
```

#### Python

```py
# Adyen Python API Library v14.0.0
import Adyen

adyen = Adyen.Adyen()
adyen.client.xapikey = "ADYEN_API_KEY"
# For the LIVE environment, also include your liveEndpointUrlPrefix.
adyen.client.platform = "test" # The environment to use library in.

# Create the request object(s)
json_request = {
  "amount": {
    "currency": "KRW",
    "value": 10000
  },
  "paymentMethod": {
    "type": "kcp_payco"
  },
  "reference": "YOUR_ORDER_NUMBER",
  "returnUrl": "https://your-company.com/checkout?shopperOrder=12xy..",
  "merchantAccount": "ADYEN_MERCHANT_ACCOUNT"
}

# Send the request
result = adyen.checkout.payments_api.payments(request=json_request, idempotency_key="UUID")
```

#### Ruby

```rb
# Adyen Ruby API Library v11.0.0
require "adyen-ruby-api-library"

adyen = Adyen::Client.new
adyen.api_key = 'ADYEN_API_KEY'
# For the LIVE environment, also include your liveEndpointUrlPrefix.
adyen.env = :test # Set to "live" for live environment

# Create the request object(s)
request_body = {
  :amount => {
    :currency => 'KRW',
    :value => 10000
  },
  :paymentMethod => {
    :type => 'kcp_payco'
  },
  :reference => 'YOUR_ORDER_NUMBER',
  :returnUrl => 'https://your-company.com/checkout?shopperOrder=12xy..',
  :merchantAccount => 'ADYEN_MERCHANT_ACCOUNT'
}

# Send the request
result = adyen.checkout.payments_api.payments(request_body, headers: { 'Idempotency-Key' => 'UUID' })
```

#### NodeJS (TypeScript)

```ts
// Adyen Node API Library v30.0.0
import { Client, CheckoutAPI, Types } from "@adyen/api-library";

// For the LIVE environment, also include your liveEndpointUrlPrefix.
const config = new Config({
  apiKey: "ADYEN_API_KEY",
  environment: EnvironmentEnum.TEST
});

const client = new Client(config);

// Create the request object(s)
const amount: Types.checkout.Amount = {
  currency: "KRW",
  value: 10000
};

const paymentDetails: Types.checkout.PaymentDetails = {
  type: Types.checkout.PaymentDetails.TypeEnum.KcpPayco
};

const paymentRequest: Types.checkout.PaymentRequest = {
  reference: "YOUR_ORDER_NUMBER",
  amount: amount,
  merchantAccount: "ADYEN_MERCHANT_ACCOUNT",
  paymentMethod: paymentDetails,
  returnUrl: "https://your-company.com/checkout?shopperOrder=12xy.."
};

// Send the request
const checkoutAPI = new CheckoutAPI(client);
const response = checkoutAPI.PaymentsApi.payments(paymentRequest, { idempotencyKey: "UUID" });
```

The response includes the `action.type`: **redirect**.

**Example response with an additional action**

```json
{
   "resultCode":"RedirectShopper",
   "action": {
       "paymentMethodType": "kcp_payco",
       "method": "GET",
       "url": "https://checkoutshopper-test.adyen.com/checkoutshopper/checkoutPaymentRedirect?redirectData=...",
       "type": "redirect"
   }
}
```

Your existing integration setup will [handle the redirect](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only#handle-the-redirect).

## Test and go live

There are no specific test credentials for PayCo.

For assistance in testing PayCo, contact our [Support Team](https://ca-test.adyen.com/ca/ca/contactUs/support.shtml?form=other).

## See also

* [API-only integration guide](/online-payments/build-your-integration/advanced-flow/?platform=Web\&integration=API%20only)