@Sunmovies said:
Invalid API key
Hi Team,
I am getting a error code 401 , with invalid API key for user name "Sunmovies".
Can you please check and let me know the issue for the API key.
Thank you !

Only the admin, Travis Bell, and you can access your API Key.
So I suggest you

Take a Test
Using a computer, desktop or notebook.
On some mobile devices this test may not work correctly.
In the URL below, change THE_KEY to your API Key.
https://api.themoviedb.org/3/movie/550?api_key=THE_KEY
Use this example to do a search using a new tab or window in your browser.
You will receive the basic data of the Movie Fight Club (1999)
https://www.themoviedb.org/movie/550-fight-club
If it works, your Key is OK.

When there is a problem, the TMDb Server sends a message.
Can you tell which message the server sent?
Here is a list of possible messages:
https://developer.themoviedb.org/docs/errors

If it does not work, let us know right here.

I am getting the below error when trying on the API reference page, API reference Authentication. error code 401 { "status_code": 7, "status_message": "Invalid API key: You must be granted a valid key.", "success": false }

Accessing through the browser works fine but does not work on the hosted site and API reference page.

@Sunmovies said:
I am getting the below error when trying on the API reference page, API reference Authentication.
error code 401
{
"status_code": 7,
"status_message": "Invalid API key: You must be granted a valid key.",
"success": false
}
Accessing through the browser works fine

Excellent

but does not work on the hosted site

What do you mean by "hosted site" ?
Your website or the TMDb DOCs ?

and API reference page.

I assume you are testing/using "Try it!" in the documentation.

The "Try it!" option in DOCs it only works with the "Access Token Auth" option.
It doesn't work if you select the "API Key Auth" option.
Your API Key validation test is done using your Token.
https://developer.themoviedb.org/reference/authentication-validate-key
If your Token works then your API Key must also work.
If you want to test your API Key directly, follow the instructions below.

Take a Test
Using a computer, desktop or notebook.
On some mobile devices this test may not work correctly.
In the URL below, change THE_KEY to your API Key.
https://api.themoviedb.org/3/movie/550?api_key=THE_KEY
Use this example to do a search using a new tab or window in your browser.
You will receive the basic data of the Movie Fight Club (1999)
https://www.themoviedb.org/movie/550-fight-club
If it works, your Key is OK.