Apologies for the late reply.
One can make max 3 request in 1 sec, 100 request in 1 min and max 6000 in 1 hour as per Truedata doc link13.
TrueData Websocket API Documentation & Sample Code
In this Dropbox folder, along with detailed documentation, they have:-
1) Sample codes for Python (with library)
2) Sample codes for Python (without using our Library)
3) Sample code for nodejs (with automatic reconnect)
4) Sample code for C#.NET