You can visit this website.
And fill in the form to request for trial.
You will be able to know how long the trail will be given out to you.
Edit: I do not know the answer, so I am redirecting you to the team who handles trial request. You can ask account related questions to the team.
The use of Eikon Data APIs is predicated on having an active Eikon account subscribing to a variant of Eikon that includes access to Eikon Data APIs.
I suppose you're considering starting an Eikon trial or already have one, and you're enquiring if you'll be able to use Eikon Data APIs with your trial account. The answer is yes, as long as your Eikon trial account is active and as long as the variant of Eikon you're trialing includes Eikon Data APIs.
The data entitlements are identical whether you view data in Eikon application, retrieve it into Excel or using Eikon Data APIs. However not all data assets available through Eikon have been exposed through Eikon Data APIs.
This forum is dedicated to software developers using Refinitiv APIs. The moderators on this forum have neither the expertise nor the authority to answer sales related questions such as "what's the price of this or that service", "do you offer discounts" or "how long will my free trial last". As @chavalit.jintamalit correctly pointed out, the best resource to get answers to sales related questions is the Refinitv Sales team, which you can reach following the link provided by @chavalit.jintamalit.