curl --request POST \
  --url https://api-sandbox.endl.io/api/v0/webhooks/subscriptions \
  --header 'API-KEY: <api-key>' \
  --header 'Api-Version: <api-version>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "target": "https://api.acme.com/webhooks/endl",
  "eventFilter": [
    "payout.completed",
    "payout.failed"
  ]
}
'

import requests

url = "https://api-sandbox.endl.io/api/v0/webhooks/subscriptions"

payload = {
    "target": "https://api.acme.com/webhooks/endl",
    "eventFilter": ["payout.completed", "payout.failed"]
}
headers = {
    "Api-Version": "<api-version>",
    "API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'Api-Version': '<api-version>',
    'API-KEY': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    target: 'https://api.acme.com/webhooks/endl',
    eventFilter: ['payout.completed', 'payout.failed']
  })
};

fetch('https://api-sandbox.endl.io/api/v0/webhooks/subscriptions', 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.endl.io/api/v0/webhooks/subscriptions",
  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([
    'target' => 'https://api.acme.com/webhooks/endl',
    'eventFilter' => [
        'payout.completed',
        'payout.failed'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "API-KEY: <api-key>",
    "Api-Version: <api-version>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.endl.io/api/v0/webhooks/subscriptions"

	payload := strings.NewReader("{\n  \"target\": \"https://api.acme.com/webhooks/endl\",\n  \"eventFilter\": [\n    \"payout.completed\",\n    \"payout.failed\"\n  ]\n}")

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

	req.Header.Add("Api-Version", "<api-version>")
	req.Header.Add("API-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.endl.io/api/v0/webhooks/subscriptions")
  .header("Api-Version", "<api-version>")
  .header("API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"target\": \"https://api.acme.com/webhooks/endl\",\n  \"eventFilter\": [\n    \"payout.completed\",\n    \"payout.failed\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.endl.io/api/v0/webhooks/subscriptions")

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

request = Net::HTTP::Post.new(url)
request["Api-Version"] = '<api-version>'
request["API-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"target\": \"https://api.acme.com/webhooks/endl\",\n  \"eventFilter\": [\n    \"payout.completed\",\n    \"payout.failed\"\n  ]\n}"

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

{
  "code": 201,
  "message": "Subscription created",
  "status": "SUCCESS",
  "data": {
    "id": "2b1e8f40-3c9a-4d21-9f7e-6a1c0b5d2e34",
    "deliveryMode": "PUSH",
    "target": "https://api.acme.com/webhooks/endl",
    "eventFilter": [
      "payout.completed",
      "payout.failed"
    ],
    "schemaVersion": "2026-09.1",
    "status": "ACTIVE",
    "secretHint": "whsec_…5RtBw",
    "webhook_secret": "whsec_k2p9Fa7QxVn3Jh05RtBw",
    "createdOn": "2026-09-02T12:34:56.789Z"
  },
  "errors": []
}

{
  "code": 400,
  "message": "target resolves to a non-public address",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRWHK_1309",
      "message": "target resolves to a non-public address",
      "field": null
    }
  ]
}

{
  "code": 401,
  "message": "Authentication failed",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCORE_1004",
      "message": "Authentication failed",
      "field": null
    }
  ]
}

{
  "code": 403,
  "message": "Access denied",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCORE_1005",
      "message": "Access denied",
      "field": null
    }
  ]
}

{
  "code": 409,
  "message": "a subscription for this target already exists",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRWHK_1001",
      "message": "a subscription for this target already exists",
      "field": null
    }
  ]
}

{
  "code": 422,
  "message": "delivery mode SQS is not available yet",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRWHK_1008",
      "message": "delivery mode SQS is not available yet",
      "field": null
    }
  ]
}

{
  "code": 429,
  "message": "Rate limit exceeded",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCORE_1006",
      "message": "Rate limit exceeded",
      "field": null
    }
  ]
}

{
  "code": 502,
  "message": "Upstream webhook service error",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRWHK_1900",
      "message": "Upstream webhook service error",
      "field": null
    }
  ]
}