To use Zyte Smart Proxy Manager(formerly Crawlera) , we need to authenticate the Smart Proxy Manager user. This authentication is done using Smart Proxy Manager API key. This is different than the Zyte API key. 

Smart Proxy Manager API key can be found in the Set up instruction page

The API key will be given in the Set up page as below. In cases where there is suspicion of API keys being compromised, you can create new Smart Proxy Manager key by pressing "Generate New Smart Proxy Manager Key".

If you are facing issues even after using correct API key, feel free to contact our Support team.