Hyperliquid
Build the typed data for a Hyperliquid withdrawal (step 1 of 2)
Builds the EIP-712 withdraw3 payload for a USDC withdrawal from Hyperliquid to an Arbitrum address. Kairos never signs a withdrawal — your main wallet does, and this endpoint only hands you the bytes.
This call is pure. It writes nothing, reserves nothing, and has no side effects. Never calling POST /exchanges/hyperliquid/withdraw afterwards has zero consequence.
destination defaults to wallet_address. Omit it and you withdraw to yourself. If you set it, be certain: Kairos validates only the amount, never the destination address, and a signed withdrawal to a wrong address is irreversible.
No server-side binding between prepare and submit. The submit endpoint accepts any well-formed {amount, time, destination, signature} — correctness rests entirely on Hyperliquid re-verifying your signature. Prepare is a convenience, not a control.
Auth & scope. Requires trade:execute for hyperliquid, wallet ownership, and the mutation gate. Not rate limited.
POST
/
exchanges
/
hyperliquid
/
withdraw
/
prepare
Build the typed data for a Hyperliquid withdrawal (step 1 of 2)
curl --request POST \
--url https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare \
--header 'Content-Type: application/json' \
--header 'X-Api-Key: <api-key>' \
--header 'X-Api-Secret: <api-key>' \
--header 'X-Client-Id: <api-key>' \
--data '
{
"wallet_address": "<string>",
"amount": "<string>",
"destination": "<string>"
}
'import requests
url = "https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare"
payload = {
"wallet_address": "<string>",
"amount": "<string>",
"destination": "<string>"
}
headers = {
"X-Client-Id": "<api-key>",
"X-Api-Key": "<api-key>",
"X-Api-Secret": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'X-Client-Id': '<api-key>',
'X-Api-Key': '<api-key>',
'X-Api-Secret': '<api-key>',
'Content-Type': 'application/json'
},
body: JSON.stringify({wallet_address: '<string>', amount: '<string>', destination: '<string>'})
};
fetch('https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare', 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://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare",
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([
'wallet_address' => '<string>',
'amount' => '<string>',
'destination' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-Api-Key: <api-key>",
"X-Api-Secret: <api-key>",
"X-Client-Id: <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://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare"
payload := strings.NewReader("{\n \"wallet_address\": \"<string>\",\n \"amount\": \"<string>\",\n \"destination\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-Client-Id", "<api-key>")
req.Header.Add("X-Api-Key", "<api-key>")
req.Header.Add("X-Api-Secret", "<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://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare")
.header("X-Client-Id", "<api-key>")
.header("X-Api-Key", "<api-key>")
.header("X-Api-Secret", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"wallet_address\": \"<string>\",\n \"amount\": \"<string>\",\n \"destination\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-Client-Id"] = '<api-key>'
request["X-Api-Key"] = '<api-key>'
request["X-Api-Secret"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"wallet_address\": \"<string>\",\n \"amount\": \"<string>\",\n \"destination\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"typed_data": {},
"time": 123,
"destination": "<string>",
"amount": "<string>"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}{
"error": "Unauthorized"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}Authorizations
Credential client id (kairos_ck_...). Must be sent together with X-Api-Key and X-Api-Secret.
64-char hex API key.
64-char hex API secret.
Body
application/json
Body for POST /exchanges/hyperliquid/withdraw/prepare. This call is PURE — it writes nothing and has no side effects; it only builds the typed data for you to sign.
The Hyperliquid main wallet. Must be owned by the authenticated caller.
USDC amount as a plain decimal string. Only ASCII digits and a single . not in first position are accepted, and it must parse to a finite value > 0 — 1e5, .5, -1, inf and NaN are all rejected. Kairos enforces NO minimum and NO maximum; Hyperliquid's own withdrawal minimum and flat fee are applied venue-side.
Arbitrum destination address. Defaults to wallet_address (withdraw to self) when omitted. Kairos does NOT validate this address — see the endpoint description.
Response
Typed data to sign, plus the time nonce to echo back.
The EIP-712 typed data for Hyperliquid's withdraw3 action. Sign this with the main wallet.
Millisecond timestamp that is ALSO the action's nonce. Pass it back unchanged to POST /exchanges/hyperliquid/withdraw.
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Build the typed data for a Hyperliquid withdrawal (step 1 of 2)
curl --request POST \
--url https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare \
--header 'Content-Type: application/json' \
--header 'X-Api-Key: <api-key>' \
--header 'X-Api-Secret: <api-key>' \
--header 'X-Client-Id: <api-key>' \
--data '
{
"wallet_address": "<string>",
"amount": "<string>",
"destination": "<string>"
}
'import requests
url = "https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare"
payload = {
"wallet_address": "<string>",
"amount": "<string>",
"destination": "<string>"
}
headers = {
"X-Client-Id": "<api-key>",
"X-Api-Key": "<api-key>",
"X-Api-Secret": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'X-Client-Id': '<api-key>',
'X-Api-Key': '<api-key>',
'X-Api-Secret': '<api-key>',
'Content-Type': 'application/json'
},
body: JSON.stringify({wallet_address: '<string>', amount: '<string>', destination: '<string>'})
};
fetch('https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare', 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://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare",
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([
'wallet_address' => '<string>',
'amount' => '<string>',
'destination' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-Api-Key: <api-key>",
"X-Api-Secret: <api-key>",
"X-Client-Id: <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://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare"
payload := strings.NewReader("{\n \"wallet_address\": \"<string>\",\n \"amount\": \"<string>\",\n \"destination\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-Client-Id", "<api-key>")
req.Header.Add("X-Api-Key", "<api-key>")
req.Header.Add("X-Api-Secret", "<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://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare")
.header("X-Client-Id", "<api-key>")
.header("X-Api-Key", "<api-key>")
.header("X-Api-Secret", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"wallet_address\": \"<string>\",\n \"amount\": \"<string>\",\n \"destination\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://execution.kairos.trade/exchanges/hyperliquid/withdraw/prepare")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-Client-Id"] = '<api-key>'
request["X-Api-Key"] = '<api-key>'
request["X-Api-Secret"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"wallet_address\": \"<string>\",\n \"amount\": \"<string>\",\n \"destination\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"typed_data": {},
"time": 123,
"destination": "<string>",
"amount": "<string>"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}{
"error": "Unauthorized"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}{
"error": "<string>",
"error_details": {
"code": "FUNDS_INSUFFICIENT_USDC",
"message": "<string>",
"actions": [
{
"action": "enable_trading",
"label": "Add Funds",
"primary": true,
"url": "<string>"
}
],
"details": "<string>",
"metadata": {}
},
"code": "<string>"
}