@ganeden said:
Hi i have a 401 error
{status_code: 7, status_message: 'Invalid API key: You must be granted a valid key.', success: false}

Take a Test

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.

this is what i got

{"adult":false,"backdrop_path":"/hZkgoQYus5vegHoetLkCJzb17zJ.jpg","belongs_to_collection":null,"budget":63000000,"genres":[{"id":18,"name":"Drama"},{"id":53,"name":"Thriller"},{"id":35,"name":"Comedy"}],"homepage":"http://www.foxmovies.com/movies/fight-club","id":550,"imdb_id":"tt0137523","original_language":"en","original_title":"Fight Club","overview":"A ticking-time-bomb insomniac and a slippery soap salesman channel primal male aggression into a shocking new form of therapy. Their concept catches on, with underground \"fight clubs\" forming in every town, until an eccentric gets in the way and ignites an out-of-control spiral toward oblivion.","popularity":67.677,"poster_path":"/pB8BM7pdSp6B6Ih7QZ4DrQ3PmJK.jpg","production_companies":[{"id":508,"logo_path":"/7cxRWzi4LsVm4Utfpr1hfARNurT.png","name":"Regency Enterprises","origin_country":"US"},{"id":711,"logo_path":"/tEiIH5QesdheJmDAqQwvtN60727.png","name":"Fox 2000 Pictures","origin_country":"US"},{"id":20555,"logo_path":"/hD8yEGUBlHOcfHYbujp71vD8gZp.png","name":"Taurus Film","origin_country":"DE"},{"id":54051,"logo_path":null,"name":"Atman Entertainment","origin_country":""},{"id":54052,"logo_path":null,"name":"Knickerbocker Films","origin_country":"US"},{"id":4700,"logo_path":"/A32wmjrs9Psf4zw0uaixF0GXfxq.png","name":"The Linson Company","origin_country":"US"},{"id":25,"logo_path":"/qZCc1lty5FzX30aOCVRBLzaVmcp.png","name":"20th Century Fox","origin_country":"US"}],"production_countries":[{"iso_3166_1":"US","name":"United States of America"}],"release_date":"1999-10-15","revenue":100853753,"runtime":139,"spoken_languages":[{"english_name":"English","iso_639_1":"en","name":"English"}],"status":"Released","tagline":"Mischief. Mayhem. Soap.","title":"Fight Club","video":false,"vote_average":8.435,"vote_count":26720}

You have received the correct answer.
Your API Key is valid and without problems.
That error response, Invalid API key, did you get using some programming code you're developing?