API Keys allow you to perform search API requests and also have privileges to perform management API requests. Remember to keep them private and always include a valid key for all the HTTP API requests made from your servers.
📌 Note: Only the API key of the OWNER account is valid for API operations.
To access your API Keys, go to your Admin Panel > Account > User > API Tokens.
You can create a new API key by clicking on the ‘+ New API Key’ button. A pop-up window will emerge for you to complete.
Note that the same API token can be used for all your search engines, within the same account.
You can find more information on API in these articles Search API and Management API.