All endpoints must be include an authorization header. We use the standard HTTP
Authorization header to pass authentication information.
These can be found under on the Settings page. Choose the Developer tab from the menu panel and take note of the API Key and API Secret provided.
API keys by environment
The API keys are different in each environment.You need to use your Sandbox keys in the Sandbox environment and your Production keys in the Production environment. Click on the GO TO SANDBOX button to switch to the Sandbox environment and get the API keys.