curl --request POST \
  --url https://api-sandbox.y.uno/v1/connections \
  --header 'Content-Type: application/json' \
  --header 'PRIVATE-SECRET-KEY: <api-key>' \
  --header 'PUBLIC-API-KEY: <api-key>' \
  --header 'X-Idempotency-Key: <x-idempotency-key>' \
  --data '
{
  "account_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "merchant_connection_id": "adyen-us-prod-001",
  "provider_id": "ADYEN",
  "flow_type": "PAYIN",
  "payment_methods": [
    "CARD",
    "GOOGLE_PAY"
  ],
  "params": [
    {
      "param_id": "<string>",
      "value": "<string>"
    }
  ]
}
'

import requests

url = "https://api-sandbox.y.uno/v1/connections"

payload = {
    "account_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "merchant_connection_id": "adyen-us-prod-001",
    "provider_id": "ADYEN",
    "flow_type": "PAYIN",
    "payment_methods": ["CARD", "GOOGLE_PAY"],
    "params": [
        {
            "param_id": "<string>",
            "value": "<string>"
        }
    ]
}
headers = {
    "X-Idempotency-Key": "<x-idempotency-key>",
    "PUBLIC-API-KEY": "<api-key>",
    "PRIVATE-SECRET-KEY": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-Idempotency-Key': '<x-idempotency-key>',
    'PUBLIC-API-KEY': '<api-key>',
    'PRIVATE-SECRET-KEY': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    account_id: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
    merchant_connection_id: 'adyen-us-prod-001',
    provider_id: 'ADYEN',
    flow_type: 'PAYIN',
    payment_methods: ['CARD', 'GOOGLE_PAY'],
    params: [{param_id: '<string>', value: '<string>'}]
  })
};

fetch('https://api-sandbox.y.uno/v1/connections', 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/connections",
  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([
    'account_id' => 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
    'merchant_connection_id' => 'adyen-us-prod-001',
    'provider_id' => 'ADYEN',
    'flow_type' => 'PAYIN',
    'payment_methods' => [
        'CARD',
        'GOOGLE_PAY'
    ],
    'params' => [
        [
                'param_id' => '<string>',
                'value' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "PRIVATE-SECRET-KEY: <api-key>",
    "PUBLIC-API-KEY: <api-key>",
    "X-Idempotency-Key: <x-idempotency-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/connections"

	payload := strings.NewReader("{\n  \"account_id\": \"a1b2c3d4-e5f6-7890-abcd-ef1234567890\",\n  \"merchant_connection_id\": \"adyen-us-prod-001\",\n  \"provider_id\": \"ADYEN\",\n  \"flow_type\": \"PAYIN\",\n  \"payment_methods\": [\n    \"CARD\",\n    \"GOOGLE_PAY\"\n  ],\n  \"params\": [\n    {\n      \"param_id\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}")

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

	req.Header.Add("X-Idempotency-Key", "<x-idempotency-key>")
	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.post("https://api-sandbox.y.uno/v1/connections")
  .header("X-Idempotency-Key", "<x-idempotency-key>")
  .header("PUBLIC-API-KEY", "<api-key>")
  .header("PRIVATE-SECRET-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"account_id\": \"a1b2c3d4-e5f6-7890-abcd-ef1234567890\",\n  \"merchant_connection_id\": \"adyen-us-prod-001\",\n  \"provider_id\": \"ADYEN\",\n  \"flow_type\": \"PAYIN\",\n  \"payment_methods\": [\n    \"CARD\",\n    \"GOOGLE_PAY\"\n  ],\n  \"params\": [\n    {\n      \"param_id\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.y.uno/v1/connections")

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

request = Net::HTTP::Post.new(url)
request["X-Idempotency-Key"] = '<x-idempotency-key>'
request["PUBLIC-API-KEY"] = '<api-key>'
request["PRIVATE-SECRET-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"account_id\": \"a1b2c3d4-e5f6-7890-abcd-ef1234567890\",\n  \"merchant_connection_id\": \"adyen-us-prod-001\",\n  \"provider_id\": \"ADYEN\",\n  \"flow_type\": \"PAYIN\",\n  \"payment_methods\": [\n    \"CARD\",\n    \"GOOGLE_PAY\"\n  ],\n  \"params\": [\n    {\n      \"param_id\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}"

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

{
  "connection_id": "f1a3c4d5-7b8e-4a2c-9d1e-3f4a5b6c7d8e",
  "merchant_connection_id": "stripe-us-prod-001",
  "provider_id": "STRIPE",
  "status": "ACTIVE",
  "flow_type": "PAYIN",
  "payment_methods": [
    "CARD",
    "GOOGLE_PAY",
    "APPLE_PAY"
  ],
  "params": [
    {}
  ],
  "costs": [
    {}
  ],
  "created_at": "2026-05-12T10:24:00Z",
  "updated_at": "2026-05-12T10:24:00Z"
}

{
  "type": "validation_error",
  "code": "MISSING_REQUIRED_PARAM",
  "message": "Required param 'API_KEY' is missing",
  "details": {}
}

{
  "type": "conflict",
  "code": "CONNECTION_MERCHANT_ID_CONFLICT",
  "message": "A connection with this merchant_connection_id already exists"
}