curl --request POST \
  --url https://api.onswitch.xyz/swap/initiate \
  --header 'Content-Type: application/json' \
  --header 'x-service-key: <api-key>' \
  --data '
{
  "amount": 100,
  "from_asset": "base:usdc",
  "to_asset": "solana:usdt",
  "beneficiary": {
    "wallet_address": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a"
  },
  "exact_output": false,
  "callback_url": "https://your-app.com/webhook",
  "reference": "a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90",
  "developer_fee": 0.5,
  "developer_recipient": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a",
  "refund_address": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a"
}
'

import requests

url = "https://api.onswitch.xyz/swap/initiate"

payload = {
    "amount": 100,
    "from_asset": "base:usdc",
    "to_asset": "solana:usdt",
    "beneficiary": { "wallet_address": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a" },
    "exact_output": False,
    "callback_url": "https://your-app.com/webhook",
    "reference": "a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90",
    "developer_fee": 0.5,
    "developer_recipient": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a",
    "refund_address": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a"
}
headers = {
    "x-service-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-service-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    amount: 100,
    from_asset: 'base:usdc',
    to_asset: 'solana:usdt',
    beneficiary: {wallet_address: '0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a'},
    exact_output: false,
    callback_url: 'https://your-app.com/webhook',
    reference: 'a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90',
    developer_fee: 0.5,
    developer_recipient: '0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a',
    refund_address: '0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a'
  })
};

fetch('https://api.onswitch.xyz/swap/initiate', 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.onswitch.xyz/swap/initiate",
  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([
    'amount' => 100,
    'from_asset' => 'base:usdc',
    'to_asset' => 'solana:usdt',
    'beneficiary' => [
        'wallet_address' => '0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a'
    ],
    'exact_output' => false,
    'callback_url' => 'https://your-app.com/webhook',
    'reference' => 'a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90',
    'developer_fee' => 0.5,
    'developer_recipient' => '0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a',
    'refund_address' => '0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-service-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.onswitch.xyz/swap/initiate"

	payload := strings.NewReader("{\n  \"amount\": 100,\n  \"from_asset\": \"base:usdc\",\n  \"to_asset\": \"solana:usdt\",\n  \"beneficiary\": {\n    \"wallet_address\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\"\n  },\n  \"exact_output\": false,\n  \"callback_url\": \"https://your-app.com/webhook\",\n  \"reference\": \"a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90\",\n  \"developer_fee\": 0.5,\n  \"developer_recipient\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\",\n  \"refund_address\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\"\n}")

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

	req.Header.Add("x-service-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.onswitch.xyz/swap/initiate")
  .header("x-service-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount\": 100,\n  \"from_asset\": \"base:usdc\",\n  \"to_asset\": \"solana:usdt\",\n  \"beneficiary\": {\n    \"wallet_address\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\"\n  },\n  \"exact_output\": false,\n  \"callback_url\": \"https://your-app.com/webhook\",\n  \"reference\": \"a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90\",\n  \"developer_fee\": 0.5,\n  \"developer_recipient\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\",\n  \"refund_address\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.onswitch.xyz/swap/initiate")

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

request = Net::HTTP::Post.new(url)
request["x-service-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount\": 100,\n  \"from_asset\": \"base:usdc\",\n  \"to_asset\": \"solana:usdt\",\n  \"beneficiary\": {\n    \"wallet_address\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\"\n  },\n  \"exact_output\": false,\n  \"callback_url\": \"https://your-app.com/webhook\",\n  \"reference\": \"a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90\",\n  \"developer_fee\": 0.5,\n  \"developer_recipient\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\",\n  \"refund_address\": \"0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a\"\n}"

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

{
  "success": true,
  "message": "Swap initiated successfully",
  "timestamp": "2026-04-18T14:22:08.631Z",
  "data": {
    "status": "AWAITING_DEPOSIT",
    "type": "SWAP",
    "reference": "a3f9c2e1-7b4d-4a8e-9c62-1d8f4e6b2a90",
    "rate": 1,
    "fee": {
      "total": 0.5,
      "platform": 0.45,
      "developer": 0.05,
      "currency": "USDC"
    },
    "source": {
      "amount": 100,
      "currency": "USDC"
    },
    "destination": {
      "amount": 99.5,
      "currency": "USDT"
    },
    "deposit": {
      "amount": 100,
      "address": "0x8F3aC91d2B741E59f064E9053a4d2E8F1c0b6D93a",
      "asset": "base:usdc",
      "note": [
        "Kindly send the exact amount to the wallet address to complete the transaction.",
        "This dynamic wallet address has a 30 minutes expiry window and can only be used once."
      ]
    }
  }
}

{
  "success": false,
  "message": "amount must be greater than 0 for the selected corridor",
  "timestamp": "2026-04-18T14:22:08.631Z",
  "data": null
}