curl --location --request DELETE 'https://uatoneapi.payu.in/payment-links/{{invoice_number}}' \
  --header 'Authorization: Bearer {{access_token}}' \
  --header 'merchantId: {{merchantId}}' \
  --header 'Accept: application/json'

using var client = new HttpClient();

var request = new HttpRequestMessage(
    HttpMethod.Delete,
    "https://uatoneapi.payu.in/payment-links/{{invoice_number}}"
);

request.Headers.Add("Authorization", "Bearer {{access_token}}");
request.Headers.Add("merchantId", "{{merchantId}}");
request.Headers.Add("Accept", "application/json");

var response = await client.SendAsync(request);
var responseBody = await response.Content.ReadAsStringAsync();

Console.WriteLine(responseBody);

import requests

url = "https://uatoneapi.payu.in/payment-links/{{invoice_number}}"

headers = {
    "Authorization": "Bearer {{access_token}}",
    "merchantId": "{{merchantId}}",
    "Accept": "application/json"
}

response = requests.delete(url, headers=headers)

print(response.text)

const response = await fetch(
  "https://uatoneapi.payu.in/payment-links/{{invoice_number}}",
  {
    method: "DELETE",
    headers: {
      "Authorization": "Bearer {{access_token}}",
      "merchantId": "{{merchantId}}",
      "Accept": "application/json"
    }
  }
);

const responseBody = await response.text();

console.log(responseBody);

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

HttpClient client = HttpClient.newHttpClient();

HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create(
        "https://uatoneapi.payu.in/payment-links/{{invoice_number}}"
    ))
    .header("Authorization", "Bearer {{access_token}}")
    .header("merchantId", "{{merchantId}}")
    .header("Accept", "application/json")
    .DELETE()
    .build();

HttpResponse<String> response = client.send(
    request,
    HttpResponse.BodyHandlers.ofString()
);

System.out.println(response.body());

<?php

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => 'https://uatoneapi.payu.in/payment-links/{{invoice_number}}',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'DELETE',
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer {{access_token}}',
        'merchantId: {{merchantId}}',
        'Accept: application/json'
    ]
]);

$response = curl_exec($curl);

curl_close($curl);

echo $response;

{
  "status": 0,
  "message": "string",
  "result": {},
  "errorCode": 170,
  "guid": "f529e375-739f-4c8a-b5f5-0e67fa3f533f"
}

{
  "status": -1,
  "message": "expiry cannot be less than the current date",
  "result": null,
  "errorCode": null,
  "guid": null
}