I have developed a simple algo to test Notify.Web method:

# region imports

from AlgorithmImports import *

# endregion



import json



class SwimmingFluorescentPinkHornet(QCAlgorithm):



    def Initialize(self):

        self.SetStartDate(2022, 1, 1)

        self.SetStartDate(2022, 1, 4)

        self.SetCash(100000)

        self.symbol = self.AddForex("EURUSD", Resolution.Hour).Symbol

        self.url = "https://hftwebapi.azurewebsites.net/minmax/"

        self.headers = {

            'Content-Type': 'application/json'

            }



    def OnData(self, data: Slice):

                

        if not self.Portfolio.Invested:

            self.SetHoldings(self.symbol, 1)

            payload = json.dumps({"sign": 1})

            self.Notify.Web(self.url, payload=payload, headers=self.headers)

        elif self.Portfolio.Invested:

            self.Liquidate()

            payload = json.dumps({"sign": 0})

            self.Notify.Web(self.url, payload=payload, headers=self.headers)

When I deploy it to paper trading I get an error:

Runtime Error: Trying to dynamically access a method that does not exist throws a TypeError exception. To prevent the exception, ensure each parameter type matches those required by the 'str'>) method. Please checkout the API documentation.