All requests to the API require authentication. You can authenticate your requests by adding an Authorization header with a Bearer token type as shown below, replacing the random string with your sandbox or live API key.
Authorization: Bearer 75230addbf8462cd7fd2383e8fc7b895f84a0a7g
Check supports configuring IP restrictions on generated API keys for a layer of extra security. Please reach out to your Technical Account Manager to learn more.