curl --request GET \
  --url https://api.kraken.com/v0/insto/custody/vaults/{vault_id}/withdrawal-methods \
  --header 'api-key: <api-key>' \
  --header 'api-nonce: <api-key>' \
  --header 'api-otp: <api-key>' \
  --header 'api-sign: <api-key>'

import requests

url = "https://api.kraken.com/v0/insto/custody/vaults/{vault_id}/withdrawal-methods"

headers = {
    "api-key": "<api-key>",
    "api-sign": "<api-key>",
    "api-nonce": "<api-key>",
    "api-otp": "<api-key>"
}

response = requests.get(url, headers=headers)

print(response.text)

const options = {
  method: 'GET',
  headers: {
    'api-key': '<api-key>',
    'api-sign': '<api-key>',
    'api-nonce': '<api-key>',
    'api-otp': '<api-key>'
  }
};

fetch('https://api.kraken.com/v0/insto/custody/vaults/{vault_id}/withdrawal-methods', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.kraken.com/v0/insto/custody/vaults/{vault_id}/withdrawal-methods"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("api-key", "<api-key>")
	req.Header.Add("api-sign", "<api-key>")
	req.Header.Add("api-nonce", "<api-key>")
	req.Header.Add("api-otp", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

[
  {
    "name": "Bitcoin",
    "method_id": "11111111-1111-1111-1111-111111111111",
    "fee_amount": "0.00010000",
    "fee_asset": "BTC",
    "fee_asset_class": "currency",
    "minimum": "0.00100000",
    "is_disabled": false,
    "asset": "BTC",
    "asset_class": "currency",
    "network_info": {
      "network": "Bitcoin",
      "explorer": "https://www.blockchain.com/btc/tx/{tx_id}"
    }
  }
]

{
  "type": "tag:kraken.com,2025:BadRequest",
  "status": 400,
  "title": "Bad Request",
  "data": {
    "message": "asset_class is required when asset is supplied"
  },
  "detail": "asset supplied without asset_class",
  "instance": "https://debug.kraken.com/req/01HXYZABCDEF"
}

{
  "type": "tag:kraken.com,2025:PermissionDenied",
  "status": 403,
  "title": "Permission Denied",
  "data": {
    "message": "Caller lacks read access to vault VABCDEF234567A"
  },
  "detail": "The caller does not have access to the requested vault.",
  "instance": "https://debug.kraken.com/req/01HXYZABCDEF"
}

{
  "type": "tag:kraken.com,2025:AssetNotFound",
  "status": 404,
  "title": "Asset Not Found",
  "data": {
    "message": "Asset BTC with class currency was not found"
  },
  "detail": "No asset matched the supplied asset and asset_class.",
  "instance": "https://debug.kraken.com/req/01HXYZABCDEF"
}

{
  "type": "tag:kraken.com,2025:gateway/ReadUpstream",
  "status": 500,
  "title": "Internal Server Error",
  "data": "<unknown>",
  "detail": "Failed to read response from upstream custody service.",
  "instance": "https://debug.kraken.com/req/01HXYZABCDEF"
}

{
  "type": "tag:kraken.com,2025:gateway/Connect",
  "status": 503,
  "title": "Service Unavailable",
  "data": "<unknown>",
  "detail": "Downstream custody service is temporarily unreachable; retry with backoff.",
  "instance": "https://debug.kraken.com/req/01HXYZABCDEF"
}