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APIs, Automation, Algos & Code
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Hello @Hardik

From what I understand, the Option Chain API is limited to one call every three seconds. That makes sense given that components like open interest are updated less frequently by the exchange. If I only need LTP or market depth for specific option strikes, I agree that the Market Quote APIs are the better fit.

One clarification I’m still unsure about: does the “one call per three seconds” limit apply per API key across the entire Option Chain endpoint, or per symbol/instrument?

My use case is to check option chains for 15 different symbols. Can you confirm whether:

  1. These can be queried sequentially (one after another) under the same three-second global throttle for the Option Chain endpoint, or
  2. The three-second restriction is enforced per symbol, allowing multiple different symbols to be queried within the same three-second window?
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