curl --request GET \
  --url https://api.exchange.coinbase.com/loans/loan-preview \
  --header 'cb-access-key: <api-key>' \
  --header 'cb-access-passphrase: <api-key>' \
  --header 'cb-access-sign: <api-key>' \
  --header 'cb-access-timestamp: <api-key>'

import requests

url = "https://api.exchange.coinbase.com/loans/loan-preview"

headers = {
    "cb-access-key": "<api-key>",
    "cb-access-passphrase": "<api-key>",
    "cb-access-sign": "<api-key>",
    "cb-access-timestamp": "<api-key>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {
    'cb-access-key': '<api-key>',
    'cb-access-passphrase': '<api-key>',
    'cb-access-sign': '<api-key>',
    'cb-access-timestamp': '<api-key>'
  }
};

fetch('https://api.exchange.coinbase.com/loans/loan-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://api.exchange.coinbase.com/loans/loan-preview",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "cb-access-key: <api-key>",
    "cb-access-passphrase: <api-key>",
    "cb-access-sign: <api-key>",
    "cb-access-timestamp: <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"
	"net/http"
	"io"
)

func main() {

	url := "https://api.exchange.coinbase.com/loans/loan-preview"

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

	req.Header.Add("cb-access-key", "<api-key>")
	req.Header.Add("cb-access-passphrase", "<api-key>")
	req.Header.Add("cb-access-sign", "<api-key>")
	req.Header.Add("cb-access-timestamp", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.exchange.coinbase.com/loans/loan-preview")
  .header("cb-access-key", "<api-key>")
  .header("cb-access-passphrase", "<api-key>")
  .header("cb-access-sign", "<api-key>")
  .header("cb-access-timestamp", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.exchange.coinbase.com/loans/loan-preview")

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

request = Net::HTTP::Get.new(url)
request["cb-access-key"] = '<api-key>'
request["cb-access-passphrase"] = '<api-key>'
request["cb-access-sign"] = '<api-key>'
request["cb-access-timestamp"] = '<api-key>'

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

{
  "before": {
    "open_loan_value": "<string>",
    "collateral_value": "<string>",
    "collateralization_percentage": "<string>",
    "available_to_borrow": "<string>",
    "available_per_asset": {},
    "withdrawal_restricted": true,
    "credit_limit_value": "<string>",
    "available_credit_value": "<string>",
    "collateralization_percentage_open_only": "<string>",
    "pending_loan_value": "<string>",
    "initial_margin_percentage": "<string>",
    "minimum_margin_percentage": "<string>",
    "unlock_margin_percentage": "<string>"
  },
  "after": {
    "open_loan_value": "<string>",
    "collateral_value": "<string>",
    "collateralization_percentage": "<string>",
    "available_to_borrow": "<string>",
    "available_per_asset": {},
    "withdrawal_restricted": true,
    "credit_limit_value": "<string>",
    "available_credit_value": "<string>",
    "collateralization_percentage_open_only": "<string>",
    "pending_loan_value": "<string>",
    "initial_margin_percentage": "<string>",
    "minimum_margin_percentage": "<string>",
    "unlock_margin_percentage": "<string>"
  }
}

{
  "message": "<string>"
}