curl --request POST \
  --url https://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "owner": "0x76f8fc6667e239f83a547d4e16225d6a34f6fa22",
  "receiver": "0x76f8fc6667e239f83a547d4e16225d6a34f6fa22",
  "shares": "1000000000000000000",
  "minAssetsOut": "990000"
}
'

import requests

url = "https://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview"

payload = {
    "owner": "0x76f8fc6667e239f83a547d4e16225d6a34f6fa22",
    "receiver": "0x76f8fc6667e239f83a547d4e16225d6a34f6fa22",
    "shares": "1000000000000000000",
    "minAssetsOut": "990000"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    owner: '0x76f8fc6667e239f83a547d4e16225d6a34f6fa22',
    receiver: '0x76f8fc6667e239f83a547d4e16225d6a34f6fa22',
    shares: '1000000000000000000',
    minAssetsOut: '990000'
  })
};

fetch('https://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview', 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://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview",
  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([
    'owner' => '0x76f8fc6667e239f83a547d4e16225d6a34f6fa22',
    'receiver' => '0x76f8fc6667e239f83a547d4e16225d6a34f6fa22',
    'shares' => '1000000000000000000',
    'minAssetsOut' => '990000'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview"

	payload := strings.NewReader("{\n  \"owner\": \"0x76f8fc6667e239f83a547d4e16225d6a34f6fa22\",\n  \"receiver\": \"0x76f8fc6667e239f83a547d4e16225d6a34f6fa22\",\n  \"shares\": \"1000000000000000000\",\n  \"minAssetsOut\": \"990000\"\n}")

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

	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://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"owner\": \"0x76f8fc6667e239f83a547d4e16225d6a34f6fa22\",\n  \"receiver\": \"0x76f8fc6667e239f83a547d4e16225d6a34f6fa22\",\n  \"shares\": \"1000000000000000000\",\n  \"minAssetsOut\": \"990000\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox.groundtech.co/v2/microvaults/vaults/{vaultId}/redemptions/preview")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"owner\": \"0x76f8fc6667e239f83a547d4e16225d6a34f6fa22\",\n  \"receiver\": \"0x76f8fc6667e239f83a547d4e16225d6a34f6fa22\",\n  \"shares\": \"1000000000000000000\",\n  \"minAssetsOut\": \"990000\"\n}"

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

{
  "plan": {
    "mode": "requested",
    "action": "request_redeem",
    "parameters": {
      "owner": "0x76f8fc6667E239f83a547d4e16225d6a34f6FA22",
      "receiver": "0x76f8fc6667E239f83a547d4e16225d6a34f6FA22",
      "shares": "5000000000000000000"
    },
    "reason": "insufficient_synchronous_liquidity",
    "asyncLegs": [
      {
        "sourceId": "0x1111111111111111111111111111111111111111111111111111111111111111",
        "sourceName": "Invesco USTB",
        "expectedAssets": "4998100",
        "expectedProcessingSeconds": 86400,
        "maxProcessingSeconds": 259200
      }
    ],
    "timing": {
      "expectedSeconds": 86400,
      "maximumSeconds": 259200
    },
    "directTransaction": {
      "executionMode": "end_user_direct_transaction",
      "relayable": false,
      "from": "0x76f8fc6667E239f83a547d4e16225d6a34f6FA22",
      "to": "0x848837d997f0ce3f753d4644ee51b837ab8b386e",
      "data": "0xabcdef01",
      "value": "0",
      "chainId": 11155111
    }
  }
}

{
  "error": "invalid_request",
  "message": "allocation targets and idleTargetBps must total 10000"
}

{
  "error": "Unauthenticated request",
  "message": "Missing or invalid bearer token"
}