curl --location 'https://uat-accounts.payu.in/oauth/revoke' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  -d 'client_id={{client_id}}' \
  -d 'client_secret={{client_secret}}' \
  -d 'token={{access_token}}'

import requests

url = "https://uat-accounts.payu.in/oauth/revoke"

payload = {
    "client_id":     "{{client_id}}",
    "client_secret": "{{client_secret}}",
    "token":         "{{access_token}}"
}

response = requests.post(url, data=payload)
# A 200 with an empty body means the token was successfully revoked
print(response.status_code)

const axios = require('axios');
const qs = require('querystring');

const response = await axios.post(
  'https://uat-accounts.payu.in/oauth/revoke',
  qs.stringify({
    client_id:     '{{client_id}}',
    client_secret: '{{client_secret}}',
    token:         '{{access_token}}'
  }),
  { headers: { 'Content-Type': 'application/x-www-form-urlencoded' } }
);

// 200 with empty body = success
console.log(response.status);

using var client = new HttpClient();

var request = new HttpRequestMessage(
    HttpMethod.Post,
    "https://uat-accounts.payu.in/oauth/revoke"
);

request.Content = new FormUrlEncodedContent(new[]
{
    new KeyValuePair<string, string>("client_id", "{{client_id}}"),
    new KeyValuePair<string, string>("client_secret", "{{client_secret}}"),
    new KeyValuePair<string, string>("token", "{{access_token}}")
});

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

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

HttpClient client = HttpClient.newHttpClient();

String formData =
    "client_id={{client_id}}" +
    "&client_secret={{client_secret}}" +
    "&token={{access_token}}";

HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://uat-accounts.payu.in/oauth/revoke"))
    .header("Content-Type", "application/x-www-form-urlencoded")
    .POST(HttpRequest.BodyPublishers.ofString(formData))
    .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://uat-accounts.payu.in/oauth/revoke',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Content-Type: application/x-www-form-urlencoded'
    ],
    CURLOPT_POSTFIELDS => [
        'client_id' => '{{client_id}}',
        'client_secret' => '{{client_secret}}',
        'token' => '{{access_token}}'
    ]
]);

$response = curl_exec($curl);

curl_close($curl);

echo $response;

HTTP/1.1 200 OK
Content-Length: 0

{
  "error": "invalid_client",
  "error_description": "Client authentication failed due to unknown client, no client authentication included, or unsupported authentication method."
}