API (Application Programming Interface) is a channel that allows the copier to communicate with the trading platform. Heron Copier (and most other copier apps) use the API to copy trades. When the API is blocked, the copier (and all other copier apps) will not be able to connect to the trading platform. Here is a list of prop firms that are known to block API access:
  • FTMO (only blocks DXtrade accounts)
  • MFFX (DXtrade and MatchTrader aren’t working)
  • Maven
  • Alpha Capital Group
  • FundingPips (all platforms except TradeLocker)
  • Top One Trader
  • The Funded Trader (MatchTrader)
The list may not be exhaustive and there are probably more prop firms that block API access. To work around this issue, you can use the non-API mode of the copier which is available on MatchTrader and DXtrade slave copier apps using the local version of Heron Copier.
Due to the fact that the non-API mode is not using the official API, the non-API mode may not have the same features as the normal API mode.