In order for someone to help you with API Request questions, it is critical that you post here the API Request you are using.
Remember to replace your Key with [THE_KEY] , or something like that.

If possible, post the Initial Requisition, which had a response of 20 films,
And the first Requisition, which had a response of 2 films
And the second Requisition, which had an answer of 8 films

EDIT

Is there a limit on the number of similar movies that I can get for each request?

I do not think so.

@oscaralvarado said:

Although, I am getting different numbers in each of the requests: 2 movies for the first one, 8 for the second, 3, 9, and 10 movies for each the rest. Why is this happening? Is there a limit on the number of similar movies that I can get for each request? Am I doing something wrong making 5 requests to the API?

The /similar methods are trying to build a map related to keywords and genres, so the results you get will be based on the data that has been entered for those fields and will vary quite greatly across all of the items. I believe the only check related to this is to only return items that have at least 3 items to return. So the results will be anywhere from 3 to .

Thank you very much both of you! I managed to solve the problem. Indeed it seems to be something related to what Travis has mentioned, so I just implemented a workaround and now it is working nicely.

Thanks a lot, both @ticao2 and @travisbell