Hi Randy,
Thanks for the question and welcome to BCDA! Please try the requests again with the backslash "\" character removed from the URLs. For example, please use "
https://sandbox.bcda.cms.gov/api/v2/Group/all/$export".
That character "\" is only included in the sample curl requests to ensure compatibility across operating systems and command line interfaces and should be removed from requests made with Postman.
If you continue to see 404 errors after making these changes, please send us screenshots of the request and headers you are making in Postman and we can continue working to identify the issue.
Thanks,
The BCDA Team