@FaisalDev said:

I have using trending api for tmdb its sending me a list of 20 movies but the data shows there are 20,000 movies in top trending list.
I get the page number as 1 always I am not sure how to get page 2,3,4 ..... and so on upto page 1000 to get a list of all trending movies.
I am using node js "node-themoviedb" wrapper library for this, my code is below.

const pathParams = {
        pathParameters: {
            media_type:'all',
            time_window: 'day' 
        },
    }

    let trending = await mdb.trending.getTrending(pathParams);
    return trending.data

If your API Request does not specify the page, by default you will receive page 1.
So for the next pages you must specify the page number you want.
For example:

https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=1  
https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=2  
https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=3  
...  
https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=494  
https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=495  
...  
https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=996  
https://api.themoviedb.org/3/trending/all/day?api_key=THE_KEY&page=997  

That is, make an API Request for each page.

@FaisalDev said:

I have using trending api for tmdb its sending me a list of 20 movies but the data shows there are 20,000 movies in top trending list. I get the page number as 1 always I am not sure how to get page 2,3,4 ..... and so on upto page 1000 to get a list of all trending movies. I am using node js "node-themoviedb" wrapper library for this, my code is below.

const pathParams = {
        pathParameters: {
            media_type:'all',
            time_window: 'day' 
        },
    }

    let trending = await mdb.trending.getTrending(pathParams);
    return trending.data