curl --request GET \
  --url https://drb.coinbase.com/api/v2/private/simulate_portfolio \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 22222,
  "jsonrpc": "2.0",
  "method": "private/simulate_portfolio",
  "params": {
    "add_positions": true,
    "currency": "BTC",
    "simulated_positions": {
      "BTC-PERPETUAL": 1
    }
  }
}
'

import requests

url = "https://drb.coinbase.com/api/v2/private/simulate_portfolio"

payload = {
    "id": 22222,
    "jsonrpc": "2.0",
    "method": "private/simulate_portfolio",
    "params": {
        "add_positions": True,
        "currency": "BTC",
        "simulated_positions": { "BTC-PERPETUAL": 1 }
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    id: 22222,
    jsonrpc: '2.0',
    method: 'private/simulate_portfolio',
    params: {
      add_positions: true,
      currency: 'BTC',
      simulated_positions: {'BTC-PERPETUAL': 1}
    }
  })
};

fetch('https://drb.coinbase.com/api/v2/private/simulate_portfolio', 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://drb.coinbase.com/api/v2/private/simulate_portfolio",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_POSTFIELDS => json_encode([
    'id' => 22222,
    'jsonrpc' => '2.0',
    'method' => 'private/simulate_portfolio',
    'params' => [
        'add_positions' => true,
        'currency' => 'BTC',
        'simulated_positions' => [
                'BTC-PERPETUAL' => 1
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "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://drb.coinbase.com/api/v2/private/simulate_portfolio"

	payload := strings.NewReader("{\n  \"id\": 22222,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"private/simulate_portfolio\",\n  \"params\": {\n    \"add_positions\": true,\n    \"currency\": \"BTC\",\n    \"simulated_positions\": {\n      \"BTC-PERPETUAL\": 1\n    }\n  }\n}")

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

	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.get("https://drb.coinbase.com/api/v2/private/simulate_portfolio")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 22222,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"private/simulate_portfolio\",\n  \"params\": {\n    \"add_positions\": true,\n    \"currency\": \"BTC\",\n    \"simulated_positions\": {\n      \"BTC-PERPETUAL\": 1\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://drb.coinbase.com/api/v2/private/simulate_portfolio")

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

request = Net::HTTP::Get.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": 22222,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"private/simulate_portfolio\",\n  \"params\": {\n    \"add_positions\": true,\n    \"currency\": \"BTC\",\n    \"simulated_positions\": {\n      \"BTC-PERPETUAL\": 1\n    }\n  }\n}"

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

{
  "id": 2,
  "jsonrpc": "2.0",
  "result": {
    "additional_reserve": 0,
    "available_funds": 115871741.76065847,
    "available_subaccount_transfer_funds": 0,
    "available_withdrawal_funds": 115871741.76065847,
    "balance": 150076473.4995114,
    "cross_collateral_enabled": true,
    "currency": "BTC",
    "delta_total": 69080.932029,
    "delta_total_map": {
      "btc_usd": 68024.519462366
    },
    "equity": 150075253.91354558,
    "fee_balance": 0,
    "futures_pl": 39497.54616685,
    "futures_session_rpl": 1.309136,
    "futures_session_upl": -164.48253509,
    "initial_margin": 37662472.03416069,
    "locked_balance": 0,
    "maintenance_margin": 30129215.84817124,
    "margin_balance": 153534213.79481918,
    "margin_model": "cross_pm",
    "options_delta": 2883.38481,
    "options_gamma": -0.03907,
    "options_gamma_map": {
      "btc_usd": -0.03907
    },
    "options_pl": 921.55562578,
    "options_session_rpl": 0,
    "options_session_upl": -174.67960675,
    "options_theta": 142583.29246,
    "options_theta_map": {
      "btc_usd": 142583.29246
    },
    "options_value": -1056.41256672,
    "options_vega": -39322.23046,
    "options_vega_map": {
      "btc_usd": -39322.23046
    },
    "portfolio_margining_enabled": true,
    "projected_delta_total": 69080.932029,
    "projected_initial_margin": 37662472.03416069,
    "projected_maintenance_margin": 30129215.84817124,
    "session_rpl": 1.309136,
    "session_upl": -339.16214185,
    "spot_reserve": 0,
    "total_delta_total_usd": 6157454218.3753195,
    "total_equity_usd": 13075634611389.318,
    "total_initial_margin_usd": 3139528603778.822,
    "total_maintenance_margin_usd": 2511559381417.215,
    "total_margin_balance_usd": 12798550648250.61,
    "total_pl": 40419.10179263
  },
  "testnet": true,
  "usDiff": 13650,
  "usIn": 1742210019774525,
  "usOut": 1742210019788175
}