Master Wallet Sign-Only

curl --request POST \
  --url https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "assets": [
    {
      "address": "0xRecipient1Address",
      "amount": "10.5",
      "id": "{{assetId1}}",
      "reference": "sign-001"
    },
    {
      "address": "0xRecipient2Address",
      "amount": "25.0",
      "id": "{{assetId2}}",
      "reference": "sign-002"
    }
  ]
}
'

import requests

url = "https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign"

payload = { "assets": [
        {
            "address": "0xRecipient1Address",
            "amount": "10.5",
            "id": "{{assetId1}}",
            "reference": "sign-001"
        },
        {
            "address": "0xRecipient2Address",
            "amount": "25.0",
            "id": "{{assetId2}}",
            "reference": "sign-002"
        }
    ] }
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    assets: [
      {
        address: '0xRecipient1Address',
        amount: '10.5',
        id: '{{assetId1}}',
        reference: 'sign-001'
      },
      {
        address: '0xRecipient2Address',
        amount: '25.0',
        id: '{{assetId2}}',
        reference: 'sign-002'
      }
    ]
  })
};

fetch('https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign', 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.blockradar.co/v1/wallets/{walletId}/withdraw/sign",
  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([
    'assets' => [
        [
                'address' => '0xRecipient1Address',
                'amount' => '10.5',
                'id' => '{{assetId1}}',
                'reference' => 'sign-001'
        ],
        [
                'address' => '0xRecipient2Address',
                'amount' => '25.0',
                'id' => '{{assetId2}}',
                'reference' => 'sign-002'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-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.blockradar.co/v1/wallets/{walletId}/withdraw/sign"

	payload := strings.NewReader("{\n  \"assets\": [\n    {\n      \"address\": \"0xRecipient1Address\",\n      \"amount\": \"10.5\",\n      \"id\": \"{{assetId1}}\",\n      \"reference\": \"sign-001\"\n    },\n    {\n      \"address\": \"0xRecipient2Address\",\n      \"amount\": \"25.0\",\n      \"id\": \"{{assetId2}}\",\n      \"reference\": \"sign-002\"\n    }\n  ]\n}")

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

	req.Header.Add("x-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.blockradar.co/v1/wallets/{walletId}/withdraw/sign")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"assets\": [\n    {\n      \"address\": \"0xRecipient1Address\",\n      \"amount\": \"10.5\",\n      \"id\": \"{{assetId1}}\",\n      \"reference\": \"sign-001\"\n    },\n    {\n      \"address\": \"0xRecipient2Address\",\n      \"amount\": \"25.0\",\n      \"id\": \"{{assetId2}}\",\n      \"reference\": \"sign-002\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"assets\": [\n    {\n      \"address\": \"0xRecipient1Address\",\n      \"amount\": \"10.5\",\n      \"id\": \"{{assetId1}}\",\n      \"reference\": \"sign-001\"\n    },\n    {\n      \"address\": \"0xRecipient2Address\",\n      \"amount\": \"25.0\",\n      \"id\": \"{{assetId2}}\",\n      \"reference\": \"sign-002\"\n    }\n  ]\n}"

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

{
  "data": {
    "errors": [],
    "success": [
      {
        "hash": "0xsignedhash1...",
        "id": "tx-uuid-1",
        "signedTransaction": "0xf86c..."
      },
      {
        "hash": "0xsignedhash2...",
        "id": "tx-uuid-2",
        "signedTransaction": "0xf86d..."
      }
    ]
  },
  "message": "Batch withdrawal signed (2/2 successful)",
  "statusCode": 200
}

Withdraw

Master Wallet Sign-Only

This endpoint allows you to sign a withdrawal from a specific wallet without broadcasting

Body Parameters

Key	Required	Type	Description
assetId	true*	string (UUID)	The ID of the asset to withdraw. Required if `assets` array is not provided.
address	true*	string	The destination wallet address for the withdrawal. Required if `assets` array is not provided.
amount	true*	string	The withdrawal amount. Must be greater than 0. Required if `assets` array is not provided.
reference	false	string	An optional reference note for the withdrawal.
note	false	string	A short message or internal remark to associate with this withdrawal. Not visible on-chain, except on Stellar, where it is attached as the transaction memo.
metadata	false	object	Optional metadata (key-value pairs) for additional transaction details.
assets	false	array of `Asset`	Used for batch withdrawals. Required if `assetId`, `amount`, and `address` are not provided.

Asset (for Batch Withdrawals)

Key	Required	Type	Description
id	true	string (UUID)	The ID of the asset to withdraw.
amount	true	string	The withdrawal amount. Must be greater than 0.
address	true	string	The destination wallet address for the withdrawal.
reference	false	string	Optional reference note for this asset withdrawal.
note	false	string	A short message or internal remark for this asset withdrawal. Not visible on-chain, except on Stellar, where it is attached as the transaction memo.
metadata	false	object	Optional metadata (key-value pairs) for this asset withdrawal.

Notes

Single withdrawal: Provide assetId, amount, and address at the top level.
Batch withdrawal: Omit top-level assetId, amount, and address, and instead provide an array of assets (each following Asset).

POST

wallets

{walletId}

withdraw

sign

Master Wallet Sign-Only

curl --request POST \
  --url https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "assets": [
    {
      "address": "0xRecipient1Address",
      "amount": "10.5",
      "id": "{{assetId1}}",
      "reference": "sign-001"
    },
    {
      "address": "0xRecipient2Address",
      "amount": "25.0",
      "id": "{{assetId2}}",
      "reference": "sign-002"
    }
  ]
}
'

import requests

url = "https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign"

payload = { "assets": [
        {
            "address": "0xRecipient1Address",
            "amount": "10.5",
            "id": "{{assetId1}}",
            "reference": "sign-001"
        },
        {
            "address": "0xRecipient2Address",
            "amount": "25.0",
            "id": "{{assetId2}}",
            "reference": "sign-002"
        }
    ] }
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    assets: [
      {
        address: '0xRecipient1Address',
        amount: '10.5',
        id: '{{assetId1}}',
        reference: 'sign-001'
      },
      {
        address: '0xRecipient2Address',
        amount: '25.0',
        id: '{{assetId2}}',
        reference: 'sign-002'
      }
    ]
  })
};

fetch('https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign', 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.blockradar.co/v1/wallets/{walletId}/withdraw/sign",
  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([
    'assets' => [
        [
                'address' => '0xRecipient1Address',
                'amount' => '10.5',
                'id' => '{{assetId1}}',
                'reference' => 'sign-001'
        ],
        [
                'address' => '0xRecipient2Address',
                'amount' => '25.0',
                'id' => '{{assetId2}}',
                'reference' => 'sign-002'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-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.blockradar.co/v1/wallets/{walletId}/withdraw/sign"

	payload := strings.NewReader("{\n  \"assets\": [\n    {\n      \"address\": \"0xRecipient1Address\",\n      \"amount\": \"10.5\",\n      \"id\": \"{{assetId1}}\",\n      \"reference\": \"sign-001\"\n    },\n    {\n      \"address\": \"0xRecipient2Address\",\n      \"amount\": \"25.0\",\n      \"id\": \"{{assetId2}}\",\n      \"reference\": \"sign-002\"\n    }\n  ]\n}")

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

	req.Header.Add("x-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.blockradar.co/v1/wallets/{walletId}/withdraw/sign")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"assets\": [\n    {\n      \"address\": \"0xRecipient1Address\",\n      \"amount\": \"10.5\",\n      \"id\": \"{{assetId1}}\",\n      \"reference\": \"sign-001\"\n    },\n    {\n      \"address\": \"0xRecipient2Address\",\n      \"amount\": \"25.0\",\n      \"id\": \"{{assetId2}}\",\n      \"reference\": \"sign-002\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.blockradar.co/v1/wallets/{walletId}/withdraw/sign")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"assets\": [\n    {\n      \"address\": \"0xRecipient1Address\",\n      \"amount\": \"10.5\",\n      \"id\": \"{{assetId1}}\",\n      \"reference\": \"sign-001\"\n    },\n    {\n      \"address\": \"0xRecipient2Address\",\n      \"amount\": \"25.0\",\n      \"id\": \"{{assetId2}}\",\n      \"reference\": \"sign-002\"\n    }\n  ]\n}"

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

{
  "data": {
    "errors": [],
    "success": [
      {
        "hash": "0xsignedhash1...",
        "id": "tx-uuid-1",
        "signedTransaction": "0xf86c..."
      },
      {
        "hash": "0xsignedhash2...",
        "id": "tx-uuid-2",
        "signedTransaction": "0xf86d..."
      }
    ]
  },
  "message": "Batch withdrawal signed (2/2 successful)",
  "statusCode": 200
}

Authorizations

x-api-key

string

header

required

Path Parameters

walletId

string

required

Example:

"YOUR_WALLET_ID"

Body

application/json

address

string

The destination wallet address. Stellar accepts classic (G...), muxed (M...), and Soroban contract (C...) recipients. Contract recipients are valid for token assets only, not native XLM.

assets

object[]

Show child attributes

Example:

[
  {
    "address": "0xRecipient1Address",
    "amount": "10.5",
    "id": "{{assetId1}}",
    "reference": "sign-001"
  },
  {
    "address": "0xRecipient2Address",
    "amount": "25.0",
    "id": "{{assetId2}}",
    "reference": "sign-002"
  }
]

Response

200 - application/json

Withdrawa (Batch)

data

object

Show child attributes

message

string

Example:

"Batch withdrawal signed (2/2 successful)"

statusCode

number

Example:

200

API Documentation

Wallet

Addresses

Customer

Asset

Transactions

Withdraw

Withdraw Fiat

Signing

Swap

Liquidity Pool

Virtual Accounts

Deposit Fiat

Auto Settlements

Smart Contract

Gateway

Payment Links

AML

Asset Recovery

Miscellaneous

Rewards

Master Wallet Sign-Only

Body Parameters

Asset (for Batch Withdrawals)

Notes

Authorizations

Path Parameters

Body

Response