Close one position on an account

curl --request POST \
  --url https://api.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "reason": "Risk review",
  "quantity": 1
}
'

import requests

url = "https://api.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close"

payload = {
    "reason": "Risk review",
    "quantity": 1
}
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({reason: 'Risk review', quantity: 1})
};

fetch('https://api.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close', 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.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close",
  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([
    'reason' => 'Risk review',
    'quantity' => 1
  ]),
  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.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close"

	payload := strings.NewReader("{\n  \"reason\": \"Risk review\",\n  \"quantity\": 1\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.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"reason\": \"Risk review\",\n  \"quantity\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hyperprop.com/platform/v1/organization/trading-accounts/{accountId}/positions/{contract}/close")

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  \"reason\": \"Risk review\",\n  \"quantity\": 1\n}"

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

{
  "success": true,
  "data": {
    "accountId": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
    "accountNumber": "ACC-50K-000123",
    "contract": "MNQZ6",
    "side": "long",
    "requestedQuantity": 1,
    "remainingQuantity": 1,
    "closed": false,
    "ordersCancelled": 0,
    "orders": [
      {
        "orderId": "<string>",
        "contract": "MNQZ6",
        "side": "sell",
        "type": "market",
        "quantity": 1,
        "filledQuantity": 1,
        "status": "filled",
        "avgFillPrice": 20010.5,
        "filledAt": "2026-10-30T14:41:07.312Z",
        "rejectReason": null,
        "reason": "Admin flatten: API key — Risk review"
      }
    ],
    "reason": "Admin flatten: API key — Risk review"
  }
}

{
  "success": false,
  "statusCode": 400,
  "error": "Bad Request",
  "message": "Cannot close 3 of MNQZ6: only 2 is open",
  "code": "QUANTITY_EXCEEDS_POSITION"
}

{
  "success": false,
  "statusCode": 401,
  "error": "Unauthorized",
  "message": "Authentication required",
  "code": "UNAUTHORIZED"
}

{
  "statusCode": 403,
  "error": "Forbidden",
  "message": "Your role does not have write access to \"Traders & accounts\"",
  "code": "INSUFFICIENT_PERMISSIONS"
}

{
  "success": false,
  "statusCode": 404,
  "error": "Not Found",
  "message": "No open position in MNQZ6",
  "code": "NO_POSITION"
}

{
  "success": false,
  "statusCode": 409,
  "error": "Conflict",
  "message": "Market is closed. Trading resumes at session open.",
  "code": "MARKET_CLOSED"
}

{
  "success": false,
  "statusCode": 500,
  "error": "Internal Server Error",
  "message": "An unexpected error occurred",
  "code": "INTERNAL_ERROR"
}

{
  "success": false,
  "statusCode": 502,
  "error": "Error",
  "message": "The trading engine could not be reached; nothing was closed",
  "code": "ENGINE_UNAVAILABLE"
}

{
  "success": false,
  "statusCode": 504,
  "error": "Error",
  "message": "The trading engine did not answer in time; the position may or may not have been closed. Read the account's positions before retrying.",
  "code": "CLOSE_OUTCOME_UNKNOWN"
}