how to perform a query on the appwrite database when consuming a rest api?

How should I set the header to send a filtering attribute and a specific value?

It wouldn't be a header. It would be a query string. See https://appwrite.io/docs/rest#query

In case, should I send my query string in the url of the consumer api? Is this?

Yes, Exactly as so

https://cloud.appwrite.io/v1/databases/{databaseId}/collections/{collectionId}/documents?queries[]="equal("attribute", [value])"&queries[]="greaterThan("attribute", [value])"

I tried to use the indicated parameter, however I got the following error:

Mm maybe remove the " before and after the query

hum, ok.

It worked. Thank you very much, @Binyamin!

Yes my bad

I tried to fetch my attribute data, according to the query sent, but I got an error stating that the attribute is not valid.

{ message: 'Index not found: id_auth', code: 400, type: 'general_argument_invalid', version: '1.2.0' }

OK, guy. I managed to resolve. I forgot to add the index in the database console.