API Key
Multiple API keys with various levels of access and authorization can be created from within the Upmarket platform. You can create new tokens on the Settings Page under API Keys section.
API Reference
Authenticate
Overview of authenticating requests with Upmarket
Upmarket uses api key based authentication. You must provide the header with a api key in order to properly make a call to the API. Here is an illustration of how the header might seem if a valid api key were substituted for it.