curl -X POST \
  -H "Content-Type: application/json" \
  -H "X-Access-Key: AQAAAAAAAF_JvPALhBthL7VGn6jV0YDqaFY" \
  https://indexer.sequence.app/rpc/IndexerGateway/GetNativeTokenBalance \
  -d '{
    "accountAddress": "0x8e3E38fe7367dd3b52D1e281E4e8400447C8d8B9"
  }'

import { SequenceIndexerGateway } from '@0xsequence/indexer'

const INDEXER_TOKEN = 'AQAAAAAAAF_JvPALhBthL7VGn6jV0YDqaFY';
const ACCOUNT_ADDRESS = '0x8e3E38fe7367dd3b52D1e281E4e8400447C8d8B9';

const indexerGateway = new SequenceIndexerGateway(
  'https://indexer.sequence.app',
  INDEXER_TOKEN
)

const res = await indexerGateway.getNativeTokenBalance({
  accountAddress: ACCOUNT_ADDRESS
})

res.balances.forEach(({ chainId, error, result }) => {
  if (error) {
    console.error(`Error fetching balance for chainId ${chainId}: ${error}`);
    return;
  }

  console.log(`chainId: ${chainId} → native balance: ${result.balance}`);
});

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"

	"github.com/0xsequence/go-sequence/indexer"
)

const indexerToken = "AQAAAAAAAF_JvPALhBthL7VGn6jV0YDqaFY"

func main() {
	ctx := context.TODO()

	seqIndexerGW := indexer.NewIndexerGatewayClient(
		"https://indexer.sequence.app",
		http.DefaultClient,
	)

	authCtx, err := indexer.WithHTTPRequestHeaders(ctx, http.Header{
		"X-Access-Key": []string{indexerToken},
	})
	if err != nil {
		log.Fatal(err)
	}

	accountAddress := "0x8e3E38fe7367dd3b52D1e281E4e8400447C8d8B9"

	nativeTokenBalances, err := seqIndexerGW.GetNativeTokenBalance(
		authCtx,
		nil, // No chainId filter
		nil, // No network filter
		&accountAddress,
	)
	if err != nil {
		log.Fatal(err)
	}

	for _, tb := range nativeTokenBalances {
		fmt.Printf(
			"ChainID: %d → Balance: %s\n",
			tb.ChainID,
			tb.Result.Balance,
		)
	}
}