Column uses basic auth to authenticate the API. You can create sandbox and production keys in the developer dashboard. Live production keys are prefixed with live_ and test sandbox keys are prefixed with test_.

Use your API key as the basic auth password. The username should be left blank (notice the colon sign before api-key that must be included). All requests must be made over https.

curl -u :<YOUR API KEY>

We do have the ability to whitelist access to the API from specific IP ranges. If this is of interest to you, we're happy to chat.