curl --request POST \
  --url https://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "action_data": {
    "reference": "<string>",
    "otp": "<string>"
  }
}
'

import requests

url = "https://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action"

payload = { "action_data": {
        "reference": "<string>",
        "otp": "<string>"
    } }
headers = {
    "Authorization": "<authorization>",
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    Authorization: '<authorization>',
    'X-Api-Key': '<x-api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({action_data: {reference: '<string>', otp: '<string>'}})
};

fetch('https://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action', 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://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action",
  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([
    'action_data' => [
        'reference' => '<string>',
        'otp' => '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <authorization>",
    "Content-Type: application/json",
    "X-Api-Key: <x-api-key>"
  ],
]);

$response = curl_exec($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://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action"

	payload := strings.NewReader("{\n  \"action_data\": {\n    \"reference\": \"<string>\",\n    \"otp\": \"<string>\"\n  }\n}")

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

	req.Header.Add("Authorization", "<authorization>")
	req.Header.Add("X-Api-Key", "<x-api-key>")
	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://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action")
  .header("Authorization", "<authorization>")
  .header("X-Api-Key", "<x-api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"action_data\": {\n    \"reference\": \"<string>\",\n    \"otp\": \"<string>\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://prod-api.pcxpay.com/v1/payments-init/{payment_id}/action")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<authorization>'
request["X-Api-Key"] = '<x-api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"action_data\": {\n    \"reference\": \"<string>\",\n    \"otp\": \"<string>\"\n  }\n}"

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

{
  "statusCode": 200,
  "response": {
    "success": true,
    "payment_id": "<string>",
    "transaction_id": "<string>",
    "status": "<string>",
    "next_action": "redirect",
    "redirect_url": "<string>",
    "provider": "<string>",
    "message": "<string>",
    "payment_data": {
      "amount": 123,
      "currency": "<string>",
      "target_amount": 123,
      "target_currency": "<string>",
      "metadata": {}
    }
  }
}

{
  "message": "<string>",
  "status": "error"
}

{
  "message": "<string>",
  "status": "error"
}

{
  "error": "<string>",
  "message": "Payment not found",
  "code": "PAYMENT_NOT_FOUND"
}

{
  "error": "<string>",
  "message": "Payment is not awaiting action",
  "code": "INVALID_STATE_TRANSITION"
}