What Is an API Key?
If you want to use Sendlane’s API then you need to get your API Key. The API Key will let the other program know that it has access to the calls.
To access your API Key you need to login to your Sendlane account and click your name in the top right, then select “Account Settings.” Once there you will see a section titled “Your Security Credentials.”
Here you will see the API & Hash keys. You can copy and paste your API key into the appropriate field of the alternate program.