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Most cost effective way to figure out a primary RIC from an ISIN (or other identifier)

What is the best way to figure out the primary RIC when I have some other identifier - like ISIN, etc? I found this article https://developers.thomsonreuters.com/article/isin%C2%A0-ric-conversion%C2%A0-dss-datascope-select-rest-api

and was able to get what I need by doing a terms and conditions on demand extraction. But from what I understand, my firm will be charged for these requests and I'm not 100% clear on how much.

I also found, through a different API, that there is a search that can be done, using SearchContext and EquitySearch. This API returns back quicker than the extraction, but it gives me a list of all RICs for the company - i.e. every exchange it trades on, and I'm not clear if there is a way to distinguish which RIC is the primary.

Is there a way to get the primary RIC using SearchContext, and does this also incur a charge on my account?

Is there any other way to accomplish what I need? I thought I remember hearing about some sort of open symbology for TR customers to use, but wasn't able to find anything about this.

Thanks..

dss-rest-apidssdatascope-selectrics
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@waynes

Equity search is most generic search available and scattered to multiple results. Unless you know the primary exchange code there is no way that you can primary trading ric.

I recommend you use Terms & Conditions web services and you can pass any instrument to identify primary trading RIC (field name on DSS/T&C is "Primary Trading RIC").

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Thank you for the reply. What about using the OpenPerm API? It seems if I pass in a ticker and a MIC, I can get a RIC back. Is this method also reliable? Is there anything to beware of when using this?

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@waynes

Yes, OpenPermID is also reliable and you can explore more mix and match to identify the Prumary Trading RIC

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