Tradier supports a couple different response formats. The way you should request a specific format is using the standard HTTP header Accept
.
application/xml
application/json
All Tradier APIs, except for OAuth endpoints, support CORS requests. That means you can make requests directly from a web browser without requiring a backend service. For more information about CORS and how you can use it in your applications, see the links below:
Tradier Inc. and its corresponding technology services (including API services) are distinct and separate from the services provided by Tradier Brokerage Inc. For more information regarding the services of Tradier, Inc., please contact techsupport@tradier.com. For more information regarding the services of Tradier Brokerage, Inc. please contact service@tradierbrokerage.com. Tradier Brokerage Inc. Member FINRA/SIPC