curl --request POST \
  --url https://api.augustus.com/v1/returns \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "deposit_id": "550e8400-e29b-41d4-a716-446655440004",
  "metadata": {
    "invoice_id": "INV-2026-0042"
  }
}
'

import requests

url = "https://api.augustus.com/v1/returns"

payload = {
    "deposit_id": "550e8400-e29b-41d4-a716-446655440004",
    "metadata": { "invoice_id": "INV-2026-0042" }
}
headers = {
    "Idempotency-Key": "<idempotency-key>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': '<idempotency-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    deposit_id: '550e8400-e29b-41d4-a716-446655440004',
    metadata: {invoice_id: 'INV-2026-0042'}
  })
};

fetch('https://api.augustus.com/v1/returns', 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.augustus.com/v1/returns",
  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([
    'deposit_id' => '550e8400-e29b-41d4-a716-446655440004',
    'metadata' => [
        'invoice_id' => 'INV-2026-0042'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Idempotency-Key: <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.augustus.com/v1/returns"

	payload := strings.NewReader("{\n  \"deposit_id\": \"550e8400-e29b-41d4-a716-446655440004\",\n  \"metadata\": {\n    \"invoice_id\": \"INV-2026-0042\"\n  }\n}")

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

	req.Header.Add("Idempotency-Key", "<idempotency-key>")
	req.Header.Add("Authorization", "Bearer <token>")
	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.augustus.com/v1/returns")
  .header("Idempotency-Key", "<idempotency-key>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"deposit_id\": \"550e8400-e29b-41d4-a716-446655440004\",\n  \"metadata\": {\n    \"invoice_id\": \"INV-2026-0042\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.augustus.com/v1/returns")

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

request = Net::HTTP::Post.new(url)
request["Idempotency-Key"] = '<idempotency-key>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"deposit_id\": \"550e8400-e29b-41d4-a716-446655440004\",\n  \"metadata\": {\n    \"invoice_id\": \"INV-2026-0042\"\n  }\n}"

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

{
  "id": "550e8400-e29b-41d4-a716-446655440005",
  "type": "return",
  "status": "initiated",
  "deposit_id": "550e8400-e29b-41d4-a716-446655440004",
  "amount": "100.50",
  "currency": "EUR",
  "failure": null,
  "initiated_at": "2026-01-15T10:30:00Z",
  "sent_at": "2026-01-15T10:35:00Z",
  "tx_hash": null,
  "rail": "sepa",
  "metadata": {
    "invoice_id": "INV-2026-0042"
  }
}