curl --request POST \
  --url https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amountCents": 2500,
  "paidAt": "2026-08-30"
}
'

import requests

url = "https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment"

payload = {
    "amountCents": 2500,
    "paidAt": "2026-08-30"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({amountCents: 2500, paidAt: '2026-08-30'})
};

fetch('https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'amountCents' => 2500,
    'paidAt' => '2026-08-30'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment"

	payload := strings.NewReader("{\n  \"amountCents\": 2500,\n  \"paidAt\": \"2026-08-30\"\n}")

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

	req.Header.Add("Authorization", "Bearer <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))

}

HttpResponse<String> response = Unirest.post("https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amountCents\": 2500,\n  \"paidAt\": \"2026-08-30\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://rest.staging.nickel.com/paymentLink/{paymentLinkId}/externalPayment")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amountCents\": 2500,\n  \"paidAt\": \"2026-08-30\"\n}"

response = http.request(request)
puts response.read_body

{
  "externalPayment": {
    "id": "cmr9zx1bq000gsf02h1d5w4t8",
    "amountCents": 2500,
    "paidAt": "2026-08-30",
    "voided": false
  },
  "paymentLink": {
    "id": "clkqzo2y1000cx9tfohoiodq1",
    "requestedAmountCents": 12055,
    "name": "INV-123",
    "status": "ACTIVE",
    "payments": [
      {
        "id": "<string>",
        "status": "SUCCEEDED",
        "fees": [
          {
            "type": "CREDIT_CARD_FEE",
            "amountInCents": 290
          }
        ],
        "amountInCents": 10000,
        "chargedAmountInCents": 10290,
        "platformFeeInCents": 290,
        "paymentLinkId": "<string>",
        "paymentMethod": {
          "id": "<string>",
          "type": "ACH",
          "achDetails": {
            "bankName": "JP Morgan Chase",
            "routingNumber": "<string>",
            "accountNumberLastFour": "<string>"
          },
          "cardDetails": {
            "brand": "visa",
            "last4": "<string>",
            "holderName": "<string>",
            "expMonth": "2",
            "expYear": "2030"
          },
          "billingDetails": {
            "name": "<string>",
            "companyName": "<string>",
            "street": "<string>",
            "city": "<string>",
            "state": "<string>",
            "zip": "<string>",
            "email": "<string>"
          }
        },
        "disbursement": {
          "id": "<string>",
          "status": "PENDING",
          "amountInCents": 10000,
          "bankName": "JP Morgan Chase",
          "accountNumberLastFour": "<string>",
          "paymentIds": [
            "clkqzo2y1000cx9tfohoiodq1"
          ],
          "createdAt": "2023-12-25",
          "paidAt": "2023-12-25"
        },
        "refunds": [
          {
            "id": "<string>",
            "amountCents": 515,
            "refundDate": "2023-11-07T05:31:56Z",
            "voided": true
          }
        ],
        "createdAt": 123,
        "estimatedDisbursementDate": "<string>"
      }
    ],
    "externalPayments": [
      {
        "id": "cmr9zx1bq000gsf02h1d5w4t8",
        "amountCents": 2500,
        "paidAt": "2026-08-30",
        "voided": false
      }
    ],
    "url": "https://nickel.nickelpayments.com/pay/Ahndhz",
    "completedAmountCents": 123,
    "dueDate": "2023-12-25",
    "customerId": "<string>",
    "feePassthroughPercent": 100,
    "creditCardEnabled": true,
    "achEnabled": true,
    "amountEditable": false
  }
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}