curl --request PATCH \
  --url https://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session} \
  --header 'Content-Type: application/json' \
  --header 'private-secret-key: <api-key>' \
  --header 'public-api-key: <api-key>' \
  --data '
{
  "country": "BR",
  "amount": {
    "currency": "ARS"
  },
  "alternative_amount": {
    "currency": "ARS"
  },
  "merchant_order_id": "007",
  "payment_description": "Payment Test",
  "account_id": "{{account_id}}"
}
'

import requests

url = "https://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session}"

payload = {
    "country": "BR",
    "amount": { "currency": "ARS" },
    "alternative_amount": { "currency": "ARS" },
    "merchant_order_id": "007",
    "payment_description": "Payment Test",
    "account_id": "{{account_id}}"
}
headers = {
    "public-api-key": "<api-key>",
    "private-secret-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {
    'public-api-key': '<api-key>',
    'private-secret-key': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    country: 'BR',
    amount: {currency: 'ARS'},
    alternative_amount: {currency: 'ARS'},
    merchant_order_id: '007',
    payment_description: 'Payment Test',
    account_id: '{{account_id}}'
  })
};

fetch('https://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session}', 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://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'country' => 'BR',
    'amount' => [
        'currency' => 'ARS'
    ],
    'alternative_amount' => [
        'currency' => 'ARS'
    ],
    'merchant_order_id' => '007',
    'payment_description' => 'Payment Test',
    'account_id' => '{{account_id}}'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "private-secret-key: <api-key>",
    "public-api-key: <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://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session}"

	payload := strings.NewReader("{\n  \"country\": \"BR\",\n  \"amount\": {\n    \"currency\": \"ARS\"\n  },\n  \"alternative_amount\": {\n    \"currency\": \"ARS\"\n  },\n  \"merchant_order_id\": \"007\",\n  \"payment_description\": \"Payment Test\",\n  \"account_id\": \"{{account_id}}\"\n}")

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

	req.Header.Add("public-api-key", "<api-key>")
	req.Header.Add("private-secret-key", "<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.patch("https://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session}")
  .header("public-api-key", "<api-key>")
  .header("private-secret-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"country\": \"BR\",\n  \"amount\": {\n    \"currency\": \"ARS\"\n  },\n  \"alternative_amount\": {\n    \"currency\": \"ARS\"\n  },\n  \"merchant_order_id\": \"007\",\n  \"payment_description\": \"Payment Test\",\n  \"account_id\": \"{{account_id}}\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.y.uno/v1/checkout/sessions/{checkout_session}")

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

request = Net::HTTP::Patch.new(url)
request["public-api-key"] = '<api-key>'
request["private-secret-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"country\": \"BR\",\n  \"amount\": {\n    \"currency\": \"ARS\"\n  },\n  \"alternative_amount\": {\n    \"currency\": \"ARS\"\n  },\n  \"merchant_order_id\": \"007\",\n  \"payment_description\": \"Payment Test\",\n  \"account_id\": \"{{account_id}}\"\n}"

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

{
  "merchant_order_id": "007",
  "checkout_session": "c67ce158-6053-4661-a1de-aed5c945b935",
  "country": "BR",
  "payment_description": "Payment Test",
  "callback_url": null,
  "amount": {
    "currency": "ARS",
    "value": 100
  },
  "created_at": "2025-11-14T00:43:22.719648Z",
  "metadata": null,
  "workflow": "SDK_CHECKOUT",
  "installments": {
    "plan_id": null,
    "plan": null
  },
  "used": false
}

{
  "code": "INVALID_REQUEST",
  "messages": [
    "Invalid request"
  ]
}

{
  "code": "INVALID_CREDENTIALS",
  "messages": [
    "Invalid credentials"
  ]
}

{
  "code": "AUTHORIZATION_REQUIRED",
  "messages": [
    "The merchant has no authorization to use this API."
  ]
}