I'd like this too. I have previously requested "Link" in games downloaded via the web interface, and someone was going to pass that request on. (Sorry, I forget who.)
I would like to have the timing information for live games too.
StartTime should be consistent, and it looks like there is a bug if it is the same as EndTime when a game has been played.
PGN data from the API Endpoint is different from the Chess.com web "Download PGN" option.
The archive api and web based download return different fields and differ in the in the information provided in moves. It would be best to merge these and have all the data accessible, instead of different data for each view.
Here is a summary of the differences I see:
API Endpoint provides the following additional information not found in Web "export/download":
Web provides the following additional information not found in API:
Example:
https://www.chess.com/live/game/2103285046
Via player api under the archive
https://api.chess.com/pub/player/tryingtolearn1234/games/2017/05
[Event "Live Chess"]
[Site "Chess.com"]
[Date "2017.05.16"]
[Round "-"]
[White "tryingtolearn1234"]
[Black "111roger"]
[Result "1-0"]
[ECO "C47"]
[ECOUrl "https://www.chess.com/openings/C47-Four-Knights-Game-Italian-Variation"]
[WhiteElo "1118"]
[BlackElo "1048"]
[TimeControl "600"]
[Termination "tryingtolearn1234 won by checkmate"]
[StartTime "02:48:20"]
[EndDate "2017.05.16"]
[EndTime "02:48:20"]
[Link "https://www.chess.com/live/game/2103285046"]
1. e4 e5 2. Nf3...(game continues)
Via the Download Feature
[Event "Live Chess"]
[Site "Chess.com"]
[Date "2017.05.15"]
[White "tryingtolearn1234"]
[Black "111roger"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1003"]
[BlackElo "974"]
[TimeControl "600"]
[EndTime "19:48:20 PDT"]
[Termination "tryingtolearn1234 won by checkmate"]
[CurrentPosition "2bk1b1r/3pqpp1/1Q1N3p/2p5/2B5/8/PPP3PP/1K1R4 b - - 0 18"]
1.e4 {[%clk 0:10:00]} e5 {[%clk 0:09:59]}....