curl --request POST \
  --url https://sandbox-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance \
  --header 'Api-Key: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "chainIds": [
    123
  ],
  "networks": [
    "<string>"
  ],
  "accountAddress": "<string>",
  "omitPrices": true
}
'

import requests

url = "https://sandbox-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance"

payload = {
    "chainIds": [123],
    "networks": ["<string>"],
    "accountAddress": "<string>",
    "omitPrices": True
}
headers = {
    "Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    chainIds: [123],
    networks: ['<string>'],
    accountAddress: '<string>',
    omitPrices: true
  })
};

fetch('https://sandbox-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance', 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-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance",
  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([
    'chainIds' => [
        123
    ],
    'networks' => [
        '<string>'
    ],
    'accountAddress' => '<string>',
    'omitPrices' => true
  ]),
  CURLOPT_HTTPHEADER => [
    "Api-Key: <api-key>",
    "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-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance"

	payload := strings.NewReader("{\n  \"chainIds\": [\n    123\n  ],\n  \"networks\": [\n    \"<string>\"\n  ],\n  \"accountAddress\": \"<string>\",\n  \"omitPrices\": true\n}")

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

	req.Header.Add("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://sandbox-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance")
  .header("Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"chainIds\": [\n    123\n  ],\n  \"networks\": [\n    \"<string>\"\n  ],\n  \"accountAddress\": \"<string>\",\n  \"omitPrices\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox-api.polygon.technology/v1/IndexerGateway/GetNativeTokenBalance")

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

request = Net::HTTP::Post.new(url)
request["Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"chainIds\": [\n    123\n  ],\n  \"networks\": [\n    \"<string>\"\n  ],\n  \"accountAddress\": \"<string>\",\n  \"omitPrices\": true\n}"

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

{
  "balances": [
    {
      "chainId": 123,
      "result": {
        "accountAddress": "<string>",
        "chainId": 123,
        "name": "<string>",
        "symbol": "<string>",
        "balance": "<string>",
        "balanceUSD": "<string>",
        "priceUSD": "<string>",
        "priceUpdatedAt": "<string>",
        "errorReason": "<string>"
      },
      "errorReason": "<string>"
    }
  ]
}

{
  "error": "WebrpcEndpoint",
  "code": 0,
  "msg": "endpoint error",
  "status": 400,
  "cause": "<string>"
}

{
  "error": "WebrpcBadResponse",
  "code": -5,
  "msg": "bad response",
  "status": 500,
  "cause": "<string>"
}