Create a Connection

Creates a connection in ACTIVE status from credentials and configuration you fill in based on the provider’s catalog.

POST /connections

Create a Connection

cURL

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

201

{
  "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"
}

Creates a connection in ACTIVE status from credentials and configuration you fill in based on the provider’s catalog. The response includes the connection_id you’ll use to reference this connection from routing rules.

Headers

X-Idempotency-Key · string · required

UUID, 24-hour scope. Re-sending the same key + body returns the cached response; same key with a different body returns a 409.

Body

account_id · string · required

UUID of the account under which this connection will be created.

merchant_connection_id · string · required

Your label for this connection. Must be unique within the account. Free-form (e.g., "adyen-us-prod-001", "stripe-eu-test").

provider_id · string · required

Yuno provider identifier (e.g., "STRIPE", "ADYEN"). Must exist in the catalog.

flow_type · enum · required

Must be "PAYIN".

payment_methods · string[] · required

Subset of the provider’s payment_method_type[] (from the catalog).

params · object[] · required

One {param_id, value} pair per parameter you’re supplying. Flat array — even nested catalog params are submitted at the top level; Yuno resolves the hierarchy from the catalog tree.

Required params (where the catalog has optional: false) must be present and non-empty. Activating a boolean parent ("value": true) makes its optional: false children required.

Show item

param_id · string · required

The exact param_id from the catalog. Casing matters.

value · string | boolean | number | array · required

Match the field_type from the catalog. Numerics are submitted as JSON numbers (or strings if the catalog says field_type: "string"). For field_type: "array", submit a JSON array.

costs · object[] · required

Per-connection cost configuration. currency must be one supported by the provider.

Show item

sort_number · integer

Order of priority for the cost entry.

cost_name · string

Label for the cost entry.

currency · string

ISO 4217 currency code.

cost_values · object

Show successful | unsuccessful

fixed_fee · number

Fixed fee amount.

percentage · number

Percentage fee.

Response

connection_id · string

Unique identifier for the connection. Save this value to reference it from routing rules.

merchant_connection_id · string

Your internal label for this connection.

provider_id · string

The provider this connection belongs to (e.g., ADYEN).

status · string

Current status (always ACTIVE on create).

flow_type · string

Always PAYIN.

payment_methods · string[]

List of supported payment methods.

params · object[]

Echoed parameters. Sensitive values are masked as ***.

costs · object[]

Cost configuration for the connection.

created_at · string

ISO 8601 timestamp.

updated_at · string

ISO 8601 timestamp.

cURL

curl -X POST 'https://api.y.uno/v1/connections' \
  -H 'public-api-key: <YOUR_PUBLIC_KEY>' \
  -H 'private-secret-key: <YOUR_SECRET_KEY>' \
  -H 'Content-Type: application/json' \
  -H 'X-Idempotency-Key: <UUID>' \
  -d '{
    "account_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "merchant_connection_id": "stripe-us-prod-001",
    "provider_id": "STRIPE",
    "flow_type": "PAYIN",
    "payment_methods": ["CARD", "GOOGLE_PAY", "APPLE_PAY"],
    "params": [
      { "param_id": "API_KEY",           "value": "sk_live_..." },
      { "param_id": "PUBLISHABLE_KEY",   "value": "pk_live_..." },
      { "param_id": "INTEGRATION_TYPE",  "value": "PAYMENT_INTENTS" },
      { "param_id": "3DS_ENABLED",       "value": true },
      { "param_id": "ORIGIN_URL",        "value": "https://checkout.acme.com" }
    ],
    "costs": [
      {
        "sort_number": 1,
        "cost_name": "Transaction Fee",
        "currency": "USD",
        "cost_values": {
          "successful":   { "fixed_fee": 0.30, "percentage": 2.9 },
          "unsuccessful": { "fixed_fee": 0.0,  "percentage": 0.0 }
        }
      }
    ]
  }'

{
  "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": [
    { "param_id": "API_KEY",             "value": "***" },
    { "param_id": "PUBLISHABLE_KEY",     "value": "pk_live_..." },
    { "param_id": "INTEGRATION_TYPE",    "value": "PAYMENT_INTENTS" },
    { "param_id": "3DS_ENABLED",         "value": true },
    { "param_id": "ORIGIN_URL",          "value": "https://checkout.acme.com" }
  ],
  "costs": [
    {
      "sort_number": 1,
      "cost_name": "Transaction Fee",
      "currency": "USD",
      "cost_values": {
        "successful":   { "fixed_fee": 0.30, "percentage": 2.9 },
        "unsuccessful": { "fixed_fee": 0.0,  "percentage": 0.0 }
      }
    }
  ],
  "created_at": "2026-05-12T10:24:00Z",
  "updated_at": "2026-05-12T10:24:00Z"
}

{
  "connection_id": "b2c4d5e6-1a2b-3c4d-5e6f-7a8b9c0d1e2f",
  "merchant_connection_id": "adyen-eu-prod-001",
  "provider_id": "ADYEN",
  "status": "ACTIVE",
  "flow_type": "PAYIN",
  "payment_methods": ["CARD", "GOOGLE_PAY", "IDEAL"],
  "params": [
    { "param_id": "merchantAccount",        "value": "ACME_LIVE" },
    { "param_id": "x-api-key",              "value": "***" },
    { "param_id": "HMAC_KEY",               "value": "***" },
    { "param_id": "url-prefix",             "value": "acme-live" },
    { "param_id": "transaction-identifier", "value": "MERCHANT_REFERENCE" },
    { "param_id": "MERCHANT_NAME",          "value": "ACME Inc." },
    { "param_id": "CAPTURE_DELAY_HOURS",    "value": "24" },
    { "param_id": "recurring-model",        "value": "CardOnFile" },
    { "param_id": "3DS_ENABLED",            "value": true },
    { "param_id": "ORIGIN_URL",             "value": "https://checkout.acme.com" }
  ],
  "costs": [
    {
      "sort_number": 1,
      "cost_name": "Transaction Fee",
      "currency": "EUR",
      "cost_values": {
        "successful":   { "fixed_fee": 0.12, "percentage": 1.2 },
        "unsuccessful": { "fixed_fee": 0.0,  "percentage": 0.0 }
      }
    }
  ],
  "created_at": "2026-05-12T10:31:42Z",
  "updated_at": "2026-05-12T10:31:42Z"
}

{
  "type": "validation_error",
  "code": "MISSING_REQUIRED_PARAM",
  "message": "Required param 'API_KEY' is missing for provider 'STRIPE'",
  "details": { "provider_id": "STRIPE", "param_id": "API_KEY" }
}

{
  "type": "conflict",
  "code": "CONNECTION_MERCHANT_ID_CONFLICT",
  "message": "A connection with merchant_connection_id 'stripe-us-prod-001' already exists in this account",
  "details": { "merchant_connection_id": "stripe-us-prod-001" }
}

Secret handling: any param marked secret: true in the catalog is returned as "value": "***". Your submitted secret is stored encrypted and never echoed back.

Errors

HTTP	code	When
400	PROVIDER_NOT_FOUND	Unknown provider_id.
400	MISSING_REQUIRED_PARAM	A required param is missing. details.param_id names which one.
400	UNSUPPORTED_PAYMENT_METHOD	payment_methods contains a method the provider doesn’t support.
400	UNSUPPORTED_CURRENCY	A costs[].currency isn’t in the provider’s supported list.
400	INVALID_PROVIDER_CREDENTIALS	The credentials failed Yuno’s pre-flight check against the provider. details.provider_message echoes the provider’s reason.
409	CONNECTION_MERCHANT_ID_CONFLICT	merchant_connection_id already exists in this account.
403	INSUFFICIENT_SCOPE	API key missing connections:write.

Authorizations

PUBLIC-API-KEY · string · header · default: <Your PUBLIC-API-KEY> · required

PRIVATE-SECRET-KEY · string · header · default: <Your PRIVATE-SECRET-KEY> · required

Headers

X-Idempotency-Key · string<uuid> · required

Body

application/json

account_id · string<uuid> · required

Example:

"a1b2c3d4-e5f6-7890-abcd-ef1234567890"

merchant_connection_id · string · required

Example:

"adyen-us-prod-001"

provider_id · string · required

Example:

"ADYEN"

flow_type · string · required

Example:

"PAYIN"

payment_methods · string[] · required

Example:

["CARD", "GOOGLE_PAY"]

params · object[] · required

Show child attributes

Response

201

application/json

Created

connection_id · string

Example:

"f1a3c4d5-7b8e-4a2c-9d1e-3f4a5b6c7d8e"

merchant_connection_id · string

Example:

"stripe-us-prod-001"

provider_id · string

Example:

"STRIPE"

status · string

Example:

"ACTIVE"

flow_type · string

Example:

"PAYIN"

payment_methods · string[]

Example:

["CARD", "GOOGLE_PAY", "APPLE_PAY"]

params · object[]

costs · object[]

created_at · string<date-time>

Example:

"2026-05-12T10:24:00Z"

updated_at · string<date-time>

Example:

"2026-05-12T10:24:00Z"