I have also try this https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&with_watch_providers=Netflix and https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&with_watch_providers=8

in output am getting a movie id = 616037

but when i try to search this movie on net flix ist not available

@Doloreste said:
Is their any api to search movie based on watch provider
I have also try this
https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&with_watch_providers=Netflix

You should always use the ID and not the provider name. In the case ID 8 and not Netflix.

and
https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&with_watch_providers=8

I believe you need to add the &watch_region=US parameter. or any other country.
See the difference:

https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&with_watch_providers=8
https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&with_watch_providers=8&watch_region=US

Discover api not support page number more that 500 https://prnt.sc/tM3Wc1zRAI_w

@Doloreste said:
Discover api not support page number more that 500
https://prnt.sc/tM3Wc1zRAI_w

The limit is 500 pages with 20 items per page.
What I can suggest is to make the Discover API Request decreasing the searched universe.
For this I use the primary_release_date.gte and primary_release_date.lte parameters.
So you can limit it to 5 years for example.

https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&sort_by=primary_release_date.desc&page=1&release_date.gte=2018-01-01&release_date.lte=2022-12-31&with_watch_providers=8&watch_providers US   

Decrease the time frame until you receive less than 500 pages in the response.

But I tested the example request I posted and in the response I only had 121 pages.

https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&region=US&sort_by=primary_release_date.desc&page=1&with_watch_providers=8&watch_region=US  
total_pages 121  
total_results   2419