Error of 429 while fetching option chain

Developer API
1

Hello, I am fetching option chain of bank nifty, nifty. I am facing problem of 429 error code it seems like too many request quickly .
while I am not requesting much please guide me and help me to solve the issue and please answer or reply in required time . I have to to wait for your replies . because I have created 2 topics still not any response received me

2

use websocket for that

3
4

Hi, I am facing the same issue for getting stock data; my code looks like this. can you help how to solve this problem and it’s writing on dart: {
class UpstoxService {
final String accessToken = “token”
final JsonService jsonService;

UpstoxService(this.jsonService);

Future<String?> getInstrumentKey(String tradingSymbol) async {
try {
  final List<dynamic> data = await jsonService.loadJsonData();
  for (var item in data) {
    if (item['trading_symbol'] == tradingSymbol) {
      return item['instrument_key'];
    }
  }
  return 'null'; // Return null if no match is found
} catch (e) {
  print("Error finding instrument key: $e");
  return 'null';
}

}

Future<Map<String, String>> fetchStockData(String instrumentKey,String symbol) async {
final url = Uri.parse(‘https://api.upstox.com/v2/market-quote/quotes?instrument_key=$instrumentKey’);
final headers = {
‘Accept’: ‘application/json’,
‘Authorization’: ‘Bearer $accessToken’,
};

final response = await http.get(url, headers: headers);
print(response.statusCode);
if (response.statusCode == 200) {
  var data = jsonDecode(response.body);
  Map<String,String> extractData =  formatData(data['data']["NSE_EQ:$symbol"]);
  return extractData;
} else {
  throw Exception('No data available');
}

}

Map<String, String> formatData(var data) {
double open = data[‘ohlc’]![‘open’];
String close = data[‘ohlc’]![‘close’].toString();
double netChange = data[‘net_change’];
String percentageChange = ((netChange/open)*100).toStringAsFixed(2);

return  {
  "currentPrice":close,
  "percentageChange":"$percentageChange%",
  "amountChange":netChange.toString(),
};

}
}

}

Status code show as: {
429
}

5

Instead of fetching multiple Instruments keys try single and debug at console.log if data ia received, then try websocket.
Trying websocket worked for me

6

Please use websocket for this use case.

To access option chain data, it’s crucial to adhere to the guidelines provided on this page: Upstox API Documentation - Market Data Feed . Familiarizing yourself with the Market Data documentation section is advised for seamless integration.

Thank you.

7

can you know how to replace my code with websocket code?

8

If you know how to using WebSocketChannel in flutter.